TY  - CONF
AU  - Janićijević, Aleksandra
AU  - Pavlović, Vladimir B.
AU  - Sknepnek, A.
AU  - Mirković, M.
AU  - Kovačević, D.
AU  - Đorđević, Nataša
AU  - Filipović, Suzana
PY  - 2021
UR  - https://dais.sanu.ac.rs/123456789/11905
AB  - Cellulose is a biopolymer with a wide range of properties like biocompatibility, hydrophilicity, porosity, good mechanical properties, biodegradability and non-toxicity. The properties and application of cellulose based materials are related to the source of the cellulose production. Despite the fact that the plant cellulose is playing a leading role in obtaining cellulose fibers, it has been found that ecologically and economically, a better source for obtaining cellulose is by fermenting a particular strain of bacteria. Although bacterial nano cellulose (BCN) based materials can be used in numerous industries, from the paper and food industries to biomedicine, their application in electronics is limited because bacterial cellulose does not have conductive and ferromagnetic properties. Having this in mind in this research, the results of the development of nanocomposite materials based on BCN modified with Fe3O4 has been presented. The differences in the interaction of Fe3O4 nanoparticles and BCN obtained by varying precipitation parameters were investigated and the effect of reaction time was followed by SEM-EDS, XRD, and FTIR analysis. It has been found that this type of modifications of the initial BCN, enables development of new composite materials with superior properties, which can be used in various fields of electronics.
PB  - Belgrade : Serbian Ceramic Society
C3  - Program and the Book of abstracts / Serbian Ceramic Society Conference Advanced Ceramics and Application IX : New Frontiers in Multifunctional Material Science and Processing, Serbia, Belgrade, 20-21. September 2021
T1  - Effect of prolonged precipitation on morphology and crystal struture of the bacterial nanocelulose/Fe3O4 composite
SP  - 55
EP  - 56
UR  - https://hdl.handle.net/21.15107/rcub_dais_11905
ER  - 

@conference{
author = "Janićijević, Aleksandra and Pavlović, Vladimir B. and Sknepnek, A. and Mirković, M. and Kovačević, D. and Đorđević, Nataša and Filipović, Suzana",
year = "2021",
abstract = "Cellulose is a biopolymer with a wide range of properties like biocompatibility, hydrophilicity, porosity, good mechanical properties, biodegradability and non-toxicity. The properties and application of cellulose based materials are related to the source of the cellulose production. Despite the fact that the plant cellulose is playing a leading role in obtaining cellulose fibers, it has been found that ecologically and economically, a better source for obtaining cellulose is by fermenting a particular strain of bacteria. Although bacterial nano cellulose (BCN) based materials can be used in numerous industries, from the paper and food industries to biomedicine, their application in electronics is limited because bacterial cellulose does not have conductive and ferromagnetic properties. Having this in mind in this research, the results of the development of nanocomposite materials based on BCN modified with Fe3O4 has been presented. The differences in the interaction of Fe3O4 nanoparticles and BCN obtained by varying precipitation parameters were investigated and the effect of reaction time was followed by SEM-EDS, XRD, and FTIR analysis. It has been found that this type of modifications of the initial BCN, enables development of new composite materials with superior properties, which can be used in various fields of electronics.",
publisher = "Belgrade : Serbian Ceramic Society",
journal = "Program and the Book of abstracts / Serbian Ceramic Society Conference Advanced Ceramics and Application IX : New Frontiers in Multifunctional Material Science and Processing, Serbia, Belgrade, 20-21. September 2021",
title = "Effect of prolonged precipitation on morphology and crystal struture of the bacterial nanocelulose/Fe3O4 composite",
pages = "55-56",
url = "https://hdl.handle.net/21.15107/rcub_dais_11905"
}

Janićijević, A., Pavlović, V. B., Sknepnek, A., Mirković, M., Kovačević, D., Đorđević, N.,& Filipović, S.. (2021). Effect of prolonged precipitation on morphology and crystal struture of the bacterial nanocelulose/Fe3O4 composite. in Program and the Book of abstracts / Serbian Ceramic Society Conference Advanced Ceramics and Application IX : New Frontiers in Multifunctional Material Science and Processing, Serbia, Belgrade, 20-21. September 2021
Belgrade : Serbian Ceramic Society., 55-56.
https://hdl.handle.net/21.15107/rcub_dais_11905

Janićijević A, Pavlović VB, Sknepnek A, Mirković M, Kovačević D, Đorđević N, Filipović S. Effect of prolonged precipitation on morphology and crystal struture of the bacterial nanocelulose/Fe3O4 composite. in Program and the Book of abstracts / Serbian Ceramic Society Conference Advanced Ceramics and Application IX : New Frontiers in Multifunctional Material Science and Processing, Serbia, Belgrade, 20-21. September 2021. 2021;:55-56.
https://hdl.handle.net/21.15107/rcub_dais_11905 .

Janićijević, Aleksandra, Pavlović, Vladimir B., Sknepnek, A., Mirković, M., Kovačević, D., Đorđević, Nataša, Filipović, Suzana, "Effect of prolonged precipitation on morphology and crystal struture of the bacterial nanocelulose/Fe3O4 composite" in Program and the Book of abstracts / Serbian Ceramic Society Conference Advanced Ceramics and Application IX : New Frontiers in Multifunctional Material Science and Processing, Serbia, Belgrade, 20-21. September 2021 (2021):55-56,
https://hdl.handle.net/21.15107/rcub_dais_11905 .

TY  - CONF
AU  - Đorđević, Nataša
AU  - Peleš, Adriana
AU  - Obradović, Nina
AU  - Vlahović, Milica
AU  - Mihajlović, Slavica
AU  - Martinović, Sanja
PY  - 2021
UR  - https://dais.sanu.ac.rs/123456789/12354
AB  - The mechanical activation of the starting mixtures of cordierite (2MgO*2Al2O3*5SiO2) with 5.00 mass % TiO2 was performed in a high energy ball mill during 10-80 min. The applied compaction pressure before the sintering process was 2t/cm2. The sintering process was performed at 1350°C for 2h and 4h in air atmosphere. Scanning electron microscopy was performed to analyze the microstructure of both compacted and sintered samples. Atomic force microscope was used to investigate the surface of the sintered samples. This paper investigates the influence of prolonged sintering time on the densities of the sintered samples, along with electrical properties.
AB  - Mehanička aktivacija početnih smeša kordierita (2MgO*2Al2O3*5SiO2) sa 5.00 mas. % TiO2 izvršena je u visokoenergetskom mlinu sa kuglama tokom 10-80 min. Primenjeni pritisak presovanja pre procesa sinterovanja bio je 2 t/cm2. Proces sinterovanja je izveden na 1350 °C tokom 2h i 4h u vazdušnoj atmosferi. Skenirajuća elektronska mikroskopija je izvršena u cilju analize mikrostrukture presovanih i sinterovanih uzoraka. Za ispitivanje površine sinterovanih uzoraka korišćen je mikroskop atomskih sila. Ovaj rad istražuje uticaj produženog vremena sinterovanja na gustinu sinterovanih uzoraka zajedno sa električnim svojstvima.
PB  - Beograd : Savez mašinskih i elektrotehničkih inženjera i tehničara Srbije - SMEITS
C3  - Zbornik radova / 9. Međunarodna konferencija o obnovljivim izvorima električne energije, Beograd, 15. oktobar 2021 = Proceedings / 9th International Conference on Renewable Electrical Power Sources, Belgrade, October 15, 2021
T1  - Influence of sintering time on density properties and SEM analysis of cordierite-based ceramics
T1  - Uticaj vremena sinterovanja na gustinu i SEM analiza kordijeritne keramike
SP  - 265
EP  - 268
UR  - https://hdl.handle.net/21.15107/rcub_dais_12354
ER  - 

@conference{
author = "Đorđević, Nataša and Peleš, Adriana and Obradović, Nina and Vlahović, Milica and Mihajlović, Slavica and Martinović, Sanja",
year = "2021",
abstract = "The mechanical activation of the starting mixtures of cordierite (2MgO*2Al2O3*5SiO2) with 5.00 mass % TiO2 was performed in a high energy ball mill during 10-80 min. The applied compaction pressure before the sintering process was 2t/cm2. The sintering process was performed at 1350°C for 2h and 4h in air atmosphere. Scanning electron microscopy was performed to analyze the microstructure of both compacted and sintered samples. Atomic force microscope was used to investigate the surface of the sintered samples. This paper investigates the influence of prolonged sintering time on the densities of the sintered samples, along with electrical properties., Mehanička aktivacija početnih smeša kordierita (2MgO*2Al2O3*5SiO2) sa 5.00 mas. % TiO2 izvršena je u visokoenergetskom mlinu sa kuglama tokom 10-80 min. Primenjeni pritisak presovanja pre procesa sinterovanja bio je 2 t/cm2. Proces sinterovanja je izveden na 1350 °C tokom 2h i 4h u vazdušnoj atmosferi. Skenirajuća elektronska mikroskopija je izvršena u cilju analize mikrostrukture presovanih i sinterovanih uzoraka. Za ispitivanje površine sinterovanih uzoraka korišćen je mikroskop atomskih sila. Ovaj rad istražuje uticaj produženog vremena sinterovanja na gustinu sinterovanih uzoraka zajedno sa električnim svojstvima.",
publisher = "Beograd : Savez mašinskih i elektrotehničkih inženjera i tehničara Srbije - SMEITS",
journal = "Zbornik radova / 9. Međunarodna konferencija o obnovljivim izvorima električne energije, Beograd, 15. oktobar 2021 = Proceedings / 9th International Conference on Renewable Electrical Power Sources, Belgrade, October 15, 2021",
title = "Influence of sintering time on density properties and SEM analysis of cordierite-based ceramics, Uticaj vremena sinterovanja na gustinu i SEM analiza kordijeritne keramike",
pages = "265-268",
url = "https://hdl.handle.net/21.15107/rcub_dais_12354"
}

Đorđević, N., Peleš, A., Obradović, N., Vlahović, M., Mihajlović, S.,& Martinović, S.. (2021). Influence of sintering time on density properties and SEM analysis of cordierite-based ceramics. in Zbornik radova / 9. Međunarodna konferencija o obnovljivim izvorima električne energije, Beograd, 15. oktobar 2021 = Proceedings / 9th International Conference on Renewable Electrical Power Sources, Belgrade, October 15, 2021
Beograd : Savez mašinskih i elektrotehničkih inženjera i tehničara Srbije - SMEITS., 265-268.
https://hdl.handle.net/21.15107/rcub_dais_12354

Đorđević N, Peleš A, Obradović N, Vlahović M, Mihajlović S, Martinović S. Influence of sintering time on density properties and SEM analysis of cordierite-based ceramics. in Zbornik radova / 9. Međunarodna konferencija o obnovljivim izvorima električne energije, Beograd, 15. oktobar 2021 = Proceedings / 9th International Conference on Renewable Electrical Power Sources, Belgrade, October 15, 2021. 2021;:265-268.
https://hdl.handle.net/21.15107/rcub_dais_12354 .

Đorđević, Nataša, Peleš, Adriana, Obradović, Nina, Vlahović, Milica, Mihajlović, Slavica, Martinović, Sanja, "Influence of sintering time on density properties and SEM analysis of cordierite-based ceramics" in Zbornik radova / 9. Međunarodna konferencija o obnovljivim izvorima električne energije, Beograd, 15. oktobar 2021 = Proceedings / 9th International Conference on Renewable Electrical Power Sources, Belgrade, October 15, 2021 (2021):265-268,
https://hdl.handle.net/21.15107/rcub_dais_12354 .

TY  - CONF
AU  - Đorđević, Nataša
AU  - Peleš, Adriana
AU  - Obradović, Nina
AU  - Vlahović, Milica
AU  - Mihajlović, Slavica
AU  - Martinović, Sanja
PY  - 2021
UR  - https://dais.sanu.ac.rs/123456789/12355
AB  - The mechanical activation of the starting mixtures of cordierite (2MgO*2Al2O3*5SiO2) with 5.00 mass % TiO2 was performed in a high energy ball mill during 10-80 min. The applied compaction pressure before the sintering process was 2t/cm2. The sintering process was performed at 1350°C for 2h and 4h in air atmosphere. Scanning electron microscopy was performed to analyze the microstructure of both compacted and sintered samples. Atomic force microscope was used to investigate the surface of the sintered samples. This paper investigates the influence of prolonged sintering time on the densities of the sintered samples, along with electrical properties.
AB  - Mehanička aktivacija početnih smeša kordierita (2MgO*2Al2O3*5SiO2) sa 5.00 mas. % TiO2 izvršena je u visokoenergetskom mlinu sa kuglama tokom 10-80 min. Primenjeni pritisak presovanja pre procesa sinterovanja bio je 2 t/cm2. Proces sinterovanja je izveden na 1350 °C tokom 2h i 4h u vazdušnoj atmosferi. Skenirajuća elektronska mikroskopija je izvršena u cilju analize mikrostrukture presovanih i sinterovanih uzoraka. Za ispitivanje površine sinterovanih uzoraka korišćen je mikroskop atomskih sila. Ovaj rad istražuje uticaj produženog vremena sinterovanja na gustinu sinterovanih uzoraka zajedno sa električnim svojstvima.
PB  - Beograd : Savez mašinskih i elektrotehničkih inženjera i tehničara Srbije - SMEITS
C3  - Zbornik radova / 9. Međunarodna konferencija o obnovljivim izvorima električne energije, Beograd, 15. oktobar 2021 = Proceedings / 9th International Conference on Renewable Electrical Power Sources, Belgrade, October 15, 2021
T1  - Electrical properties of isothermally sintered cordierite-based ceramics as function of sintering and activation time
T1  - Električna svojstva izotermski sinterovane keramike na bazi kordierita kao funkcija vremena sinterovanja i aktivacije
SP  - 269
EP  - 272
UR  - https://hdl.handle.net/21.15107/rcub_dais_12355
ER  - 

@conference{
author = "Đorđević, Nataša and Peleš, Adriana and Obradović, Nina and Vlahović, Milica and Mihajlović, Slavica and Martinović, Sanja",
year = "2021",
abstract = "The mechanical activation of the starting mixtures of cordierite (2MgO*2Al2O3*5SiO2) with 5.00 mass % TiO2 was performed in a high energy ball mill during 10-80 min. The applied compaction pressure before the sintering process was 2t/cm2. The sintering process was performed at 1350°C for 2h and 4h in air atmosphere. Scanning electron microscopy was performed to analyze the microstructure of both compacted and sintered samples. Atomic force microscope was used to investigate the surface of the sintered samples. This paper investigates the influence of prolonged sintering time on the densities of the sintered samples, along with electrical properties., Mehanička aktivacija početnih smeša kordierita (2MgO*2Al2O3*5SiO2) sa 5.00 mas. % TiO2 izvršena je u visokoenergetskom mlinu sa kuglama tokom 10-80 min. Primenjeni pritisak presovanja pre procesa sinterovanja bio je 2 t/cm2. Proces sinterovanja je izveden na 1350 °C tokom 2h i 4h u vazdušnoj atmosferi. Skenirajuća elektronska mikroskopija je izvršena u cilju analize mikrostrukture presovanih i sinterovanih uzoraka. Za ispitivanje površine sinterovanih uzoraka korišćen je mikroskop atomskih sila. Ovaj rad istražuje uticaj produženog vremena sinterovanja na gustinu sinterovanih uzoraka zajedno sa električnim svojstvima.",
publisher = "Beograd : Savez mašinskih i elektrotehničkih inženjera i tehničara Srbije - SMEITS",
journal = "Zbornik radova / 9. Međunarodna konferencija o obnovljivim izvorima električne energije, Beograd, 15. oktobar 2021 = Proceedings / 9th International Conference on Renewable Electrical Power Sources, Belgrade, October 15, 2021",
title = "Electrical properties of isothermally sintered cordierite-based ceramics as function of sintering and activation time, Električna svojstva izotermski sinterovane keramike na bazi kordierita kao funkcija vremena sinterovanja i aktivacije",
pages = "269-272",
url = "https://hdl.handle.net/21.15107/rcub_dais_12355"
}

Đorđević, N., Peleš, A., Obradović, N., Vlahović, M., Mihajlović, S.,& Martinović, S.. (2021). Electrical properties of isothermally sintered cordierite-based ceramics as function of sintering and activation time. in Zbornik radova / 9. Međunarodna konferencija o obnovljivim izvorima električne energije, Beograd, 15. oktobar 2021 = Proceedings / 9th International Conference on Renewable Electrical Power Sources, Belgrade, October 15, 2021
Beograd : Savez mašinskih i elektrotehničkih inženjera i tehničara Srbije - SMEITS., 269-272.
https://hdl.handle.net/21.15107/rcub_dais_12355

Đorđević N, Peleš A, Obradović N, Vlahović M, Mihajlović S, Martinović S. Electrical properties of isothermally sintered cordierite-based ceramics as function of sintering and activation time. in Zbornik radova / 9. Međunarodna konferencija o obnovljivim izvorima električne energije, Beograd, 15. oktobar 2021 = Proceedings / 9th International Conference on Renewable Electrical Power Sources, Belgrade, October 15, 2021. 2021;:269-272.
https://hdl.handle.net/21.15107/rcub_dais_12355 .

Đorđević, Nataša, Peleš, Adriana, Obradović, Nina, Vlahović, Milica, Mihajlović, Slavica, Martinović, Sanja, "Electrical properties of isothermally sintered cordierite-based ceramics as function of sintering and activation time" in Zbornik radova / 9. Međunarodna konferencija o obnovljivim izvorima električne energije, Beograd, 15. oktobar 2021 = Proceedings / 9th International Conference on Renewable Electrical Power Sources, Belgrade, October 15, 2021 (2021):269-272,
https://hdl.handle.net/21.15107/rcub_dais_12355 .

TY  - CONF
AU  - Đorđević, Nataša
AU  - Obradović, Nina
AU  - Sokić, Miroslav D.
AU  - Marković, Branislav R.
AU  - Patarić, Aleksandra
AU  - Petronijević, Nela
PY  - 2019
UR  - https://dais.sanu.ac.rs/123456789/14867
AB  - Mechanochemical activation of 2MgO•2Al2O3•5SiO2, starting components of cordierite, was used in aim to decrease the sintering temperature. Cordierite is very attractive ceramic material due to its properties, excellent thermal shock resistance, low dielectric constants (~5) and low thermal expansions (20•10-7 ºC-1). Specific surface area of the activated components was detected by the BET method. TG and DTA methods have followed behaviors of the three-component system. To see the influence of relaxation time on the activated components, FT IR has analyzed the starting components as well as activated mixture after 24h and 24 months. TG analyses of starting cordierite mixture activated 5 to 240 minutes showed a mass decrease from 8 to12%. DT analyses showed the influence of mechanochemical activation of the starting components as increasing energy of the starting cordierite mixture, which resulted in moving the endothermic and exothermic effects to lower temperatures. The increasing of the temperatures of these effects was about 100°C, depending on activation time. IR analyses showed that relaxation time, that is laying-off time to the moment of sintering, do not influence changes of activated mixtures. Since the given results, it can be concluded that the activated sample has no changes to the moment of using for a certain purpose (sintering) for any time since activation.
PB  - Belgrade : Association of Metallurgical Engineers of Serbia (AMES)
C3  - Book of Abstracts / Metallurgical & Materials Engineering Congress of South-East Europe (MME SEE 2019), June 5-7, 2019, Belgrade, Serbia
T1  - Activation and relaxation time influence on cordierite ceramics
SP  - 61
EP  - 61
UR  - https://hdl.handle.net/21.15107/rcub_dais_14867
ER  - 

@conference{
author = "Đorđević, Nataša and Obradović, Nina and Sokić, Miroslav D. and Marković, Branislav R. and Patarić, Aleksandra and Petronijević, Nela",
year = "2019",
abstract = "Mechanochemical activation of 2MgO•2Al2O3•5SiO2, starting components of cordierite, was used in aim to decrease the sintering temperature. Cordierite is very attractive ceramic material due to its properties, excellent thermal shock resistance, low dielectric constants (~5) and low thermal expansions (20•10-7 ºC-1). Specific surface area of the activated components was detected by the BET method. TG and DTA methods have followed behaviors of the three-component system. To see the influence of relaxation time on the activated components, FT IR has analyzed the starting components as well as activated mixture after 24h and 24 months. TG analyses of starting cordierite mixture activated 5 to 240 minutes showed a mass decrease from 8 to12%. DT analyses showed the influence of mechanochemical activation of the starting components as increasing energy of the starting cordierite mixture, which resulted in moving the endothermic and exothermic effects to lower temperatures. The increasing of the temperatures of these effects was about 100°C, depending on activation time. IR analyses showed that relaxation time, that is laying-off time to the moment of sintering, do not influence changes of activated mixtures. Since the given results, it can be concluded that the activated sample has no changes to the moment of using for a certain purpose (sintering) for any time since activation.",
publisher = "Belgrade : Association of Metallurgical Engineers of Serbia (AMES)",
journal = "Book of Abstracts / Metallurgical & Materials Engineering Congress of South-East Europe (MME SEE 2019), June 5-7, 2019, Belgrade, Serbia",
title = "Activation and relaxation time influence on cordierite ceramics",
pages = "61-61",
url = "https://hdl.handle.net/21.15107/rcub_dais_14867"
}

Đorđević, N., Obradović, N., Sokić, M. D., Marković, B. R., Patarić, A.,& Petronijević, N.. (2019). Activation and relaxation time influence on cordierite ceramics. in Book of Abstracts / Metallurgical & Materials Engineering Congress of South-East Europe (MME SEE 2019), June 5-7, 2019, Belgrade, Serbia
Belgrade : Association of Metallurgical Engineers of Serbia (AMES)., 61-61.
https://hdl.handle.net/21.15107/rcub_dais_14867

Đorđević N, Obradović N, Sokić MD, Marković BR, Patarić A, Petronijević N. Activation and relaxation time influence on cordierite ceramics. in Book of Abstracts / Metallurgical & Materials Engineering Congress of South-East Europe (MME SEE 2019), June 5-7, 2019, Belgrade, Serbia. 2019;:61-61.
https://hdl.handle.net/21.15107/rcub_dais_14867 .

Đorđević, Nataša, Obradović, Nina, Sokić, Miroslav D., Marković, Branislav R., Patarić, Aleksandra, Petronijević, Nela, "Activation and relaxation time influence on cordierite ceramics" in Book of Abstracts / Metallurgical & Materials Engineering Congress of South-East Europe (MME SEE 2019), June 5-7, 2019, Belgrade, Serbia (2019):61-61,
https://hdl.handle.net/21.15107/rcub_dais_14867 .

TY  - CONF
AU  - Đorđević, Nataša
AU  - Obradović, Nina
AU  - Sokić, Miroslav D.
AU  - Marković, Branislav
AU  - Patarić, Aleksandra
AU  - Petronijević, Nela
PY  - 2019
UR  - https://dais.sanu.ac.rs/123456789/14866
AB  - The influence of Bi2O3 as a functional additive on the process of obtaining cordierite, 2MgO-2Al2O3-5SiO2 (MAS) was studied by sintering the MgO / Bi2O3 system (sintered at 820 °C and 1100 °C), Al2O3 / Bi2O3 and SiO2 / Bi2O3 (sintered at 1100 °C ), the composition being 80% oxide and 20% Bi2O3. The effects of sintering, composition, and morphology were followed by X-ray diffraction, scanning electron microscopy and EDS analysis. It has been found that, in addition to the liquid phase, Bi2O3 produces intermediate metastable compounds with MgO and Al2O3. The sintering of MAS ceramics with 10% Bi2O3 at 1000 °C, 1100 °C and 1200 °C was also performed. Binary systems MgO / Bi2O3 at 820 ºC and 1100 ºC, Al2O3 / Bi2O3 and SiO2 / Bi2O3 were sintered at 1100 ºC, as well as MgO, Al2O3, SiO2 / Bi2O3 at 1000 ºC, 1100 ºC and 1200 ºC to examine the reaction of the cordierite synthesis. The results show the formation of a liquid phase at 820 °C (melting temperature Bi2O3), as well as the formation of metastable compounds forming MgO and Al2O3 with Bi2O3 at 1100 °C and which diffuse through the liquid phase, thus enabling the mechanism of reaction in the multi-component system to be accelerated from two aspects. By the sintering of a three-component MAS system in the presence of Bi2O3, the existence of cordierite was established. The lowest temperature at which the tracer cordierite was observed (in hexagonal form - indialite) is 1100 °C, while in the sintered system at 1200 ºC the most frequent phase is indialite. This study found that the presence of Bi2O3 in basic cordierite mixture allows the sintering temperature to decrease by ~ 170 ºC relative to the temperature of the formation of cordierite ceramics from the mixture without the presence of functional additives.
PB  - Belgrade : Association of Metallurgical Engineers of Serbia (AMES)
C3  - Book of Abstracts / Metallurgical & Materials Engineering Congress of South-East Europe (MME SEE 2019), June 5-7, 2019, Belgrade, Serbia
T1  - Bi2O3 influence on electronic ceramics sintering process and final properties
SP  - 60
EP  - 60
UR  - https://hdl.handle.net/21.15107/rcub_dais_14866
ER  - 

@conference{
author = "Đorđević, Nataša and Obradović, Nina and Sokić, Miroslav D. and Marković, Branislav and Patarić, Aleksandra and Petronijević, Nela",
year = "2019",
abstract = "The influence of Bi2O3 as a functional additive on the process of obtaining cordierite, 2MgO-2Al2O3-5SiO2 (MAS) was studied by sintering the MgO / Bi2O3 system (sintered at 820 °C and 1100 °C), Al2O3 / Bi2O3 and SiO2 / Bi2O3 (sintered at 1100 °C ), the composition being 80% oxide and 20% Bi2O3. The effects of sintering, composition, and morphology were followed by X-ray diffraction, scanning electron microscopy and EDS analysis. It has been found that, in addition to the liquid phase, Bi2O3 produces intermediate metastable compounds with MgO and Al2O3. The sintering of MAS ceramics with 10% Bi2O3 at 1000 °C, 1100 °C and 1200 °C was also performed. Binary systems MgO / Bi2O3 at 820 ºC and 1100 ºC, Al2O3 / Bi2O3 and SiO2 / Bi2O3 were sintered at 1100 ºC, as well as MgO, Al2O3, SiO2 / Bi2O3 at 1000 ºC, 1100 ºC and 1200 ºC to examine the reaction of the cordierite synthesis. The results show the formation of a liquid phase at 820 °C (melting temperature Bi2O3), as well as the formation of metastable compounds forming MgO and Al2O3 with Bi2O3 at 1100 °C and which diffuse through the liquid phase, thus enabling the mechanism of reaction in the multi-component system to be accelerated from two aspects. By the sintering of a three-component MAS system in the presence of Bi2O3, the existence of cordierite was established. The lowest temperature at which the tracer cordierite was observed (in hexagonal form - indialite) is 1100 °C, while in the sintered system at 1200 ºC the most frequent phase is indialite. This study found that the presence of Bi2O3 in basic cordierite mixture allows the sintering temperature to decrease by ~ 170 ºC relative to the temperature of the formation of cordierite ceramics from the mixture without the presence of functional additives.",
publisher = "Belgrade : Association of Metallurgical Engineers of Serbia (AMES)",
journal = "Book of Abstracts / Metallurgical & Materials Engineering Congress of South-East Europe (MME SEE 2019), June 5-7, 2019, Belgrade, Serbia",
title = "Bi2O3 influence on electronic ceramics sintering process and final properties",
pages = "60-60",
url = "https://hdl.handle.net/21.15107/rcub_dais_14866"
}

Đorđević, N., Obradović, N., Sokić, M. D., Marković, B., Patarić, A.,& Petronijević, N.. (2019). Bi2O3 influence on electronic ceramics sintering process and final properties. in Book of Abstracts / Metallurgical & Materials Engineering Congress of South-East Europe (MME SEE 2019), June 5-7, 2019, Belgrade, Serbia
Belgrade : Association of Metallurgical Engineers of Serbia (AMES)., 60-60.
https://hdl.handle.net/21.15107/rcub_dais_14866

Đorđević N, Obradović N, Sokić MD, Marković B, Patarić A, Petronijević N. Bi2O3 influence on electronic ceramics sintering process and final properties. in Book of Abstracts / Metallurgical & Materials Engineering Congress of South-East Europe (MME SEE 2019), June 5-7, 2019, Belgrade, Serbia. 2019;:60-60.
https://hdl.handle.net/21.15107/rcub_dais_14866 .

Đorđević, Nataša, Obradović, Nina, Sokić, Miroslav D., Marković, Branislav, Patarić, Aleksandra, Petronijević, Nela, "Bi2O3 influence on electronic ceramics sintering process and final properties" in Book of Abstracts / Metallurgical & Materials Engineering Congress of South-East Europe (MME SEE 2019), June 5-7, 2019, Belgrade, Serbia (2019):60-60,
https://hdl.handle.net/21.15107/rcub_dais_14866 .

TY  - JOUR
AU  - Obradović, Nina
AU  - Blagojević, Vladimir A.
AU  - Filipović, Suzana
AU  - Đorđević, Nataša
AU  - Kosanović, Darko
AU  - Marković, Smilja
AU  - Kachlik, Martin
AU  - Maca, Karel
AU  - Pavlović, Vladimir B.
PY  - 2019
UR  - https://dais.sanu.ac.rs/123456789/4558
AB  - Thermally activated processes in cordierite-based ceramics were investigated to determine the effect of the mechanical activation and the addition of TeO2 on kinetic and thermodynamic parameters of these processes. Using a combination of dilatometry and DTA measurements in the 100–1400 °C temperature range, it was established that both the mechanical activation and the addition of TeO2 have a significant effect on processes in cordierite-based ceramics. A combination of 5 mass% addition of TeO2 and mechanical activation for 40 min reduced the sintering temperature of cordierite ceramics to around 1100 °C. In addition, the analysis of DTA measurements of mechanically activated samples indicates that the mechanical activation leads to intensification of the cordierite formation through an increase in concentration of surface defects and an increase in grain contact surface in the initial powder.
PB  - Springer
T2  - Journal of Thermal Analysis and Calorimetry
T1  - Kinetics of thermally activated processes in cordierite-based ceramics
SP  - 2989
EP  - 2998
VL  - 138
DO  - 10.1007/s10973-018-7924-1
UR  - https://hdl.handle.net/21.15107/rcub_dais_4558
ER  - 

@article{
author = "Obradović, Nina and Blagojević, Vladimir A. and Filipović, Suzana and Đorđević, Nataša and Kosanović, Darko and Marković, Smilja and Kachlik, Martin and Maca, Karel and Pavlović, Vladimir B.",
year = "2019",
abstract = "Thermally activated processes in cordierite-based ceramics were investigated to determine the effect of the mechanical activation and the addition of TeO2 on kinetic and thermodynamic parameters of these processes. Using a combination of dilatometry and DTA measurements in the 100–1400 °C temperature range, it was established that both the mechanical activation and the addition of TeO2 have a significant effect on processes in cordierite-based ceramics. A combination of 5 mass% addition of TeO2 and mechanical activation for 40 min reduced the sintering temperature of cordierite ceramics to around 1100 °C. In addition, the analysis of DTA measurements of mechanically activated samples indicates that the mechanical activation leads to intensification of the cordierite formation through an increase in concentration of surface defects and an increase in grain contact surface in the initial powder.",
publisher = "Springer",
journal = "Journal of Thermal Analysis and Calorimetry",
title = "Kinetics of thermally activated processes in cordierite-based ceramics",
pages = "2989-2998",
volume = "138",
doi = "10.1007/s10973-018-7924-1",
url = "https://hdl.handle.net/21.15107/rcub_dais_4558"
}

Obradović, N., Blagojević, V. A., Filipović, S., Đorđević, N., Kosanović, D., Marković, S., Kachlik, M., Maca, K.,& Pavlović, V. B.. (2019). Kinetics of thermally activated processes in cordierite-based ceramics. in Journal of Thermal Analysis and Calorimetry
Springer., 138, 2989-2998.
https://doi.org/10.1007/s10973-018-7924-1
https://hdl.handle.net/21.15107/rcub_dais_4558

Obradović N, Blagojević VA, Filipović S, Đorđević N, Kosanović D, Marković S, Kachlik M, Maca K, Pavlović VB. Kinetics of thermally activated processes in cordierite-based ceramics. in Journal of Thermal Analysis and Calorimetry. 2019;138:2989-2998.
doi:10.1007/s10973-018-7924-1
https://hdl.handle.net/21.15107/rcub_dais_4558 .

Obradović, Nina, Blagojević, Vladimir A., Filipović, Suzana, Đorđević, Nataša, Kosanović, Darko, Marković, Smilja, Kachlik, Martin, Maca, Karel, Pavlović, Vladimir B., "Kinetics of thermally activated processes in cordierite-based ceramics" in Journal of Thermal Analysis and Calorimetry, 138 (2019):2989-2998,
https://doi.org/10.1007/s10973-018-7924-1 .,
https://hdl.handle.net/21.15107/rcub_dais_4558 .

TY  - JOUR
AU  - Obradović, Nina
AU  - Blagojević, Vladimir A.
AU  - Filipović, Suzana
AU  - Đorđević, Nataša
AU  - Kosanović, Darko
AU  - Marković, Smilja
AU  - Kachlik, Martin
AU  - Maca, Karel
AU  - Pavlović, Vladimir B.
PY  - 2019
UR  - https://dais.sanu.ac.rs/123456789/7048
AB  - Thermally activated processes in cordierite-based ceramics were investigated to determine the effect of the mechanical activation and the addition of TeO2 on kinetic and thermodynamic parameters of these processes. Using a combination of dilatometry and DTA measurements in the 100–1400 °C temperature range, it was established that both the mechanical activation and the addition of TeO2 have a significant effect on processes in cordierite-based ceramics. A combination of 5 mass% addition of TeO2 and mechanical activation for 40 min reduced the sintering temperature of cordierite ceramics to around 1100 °C. In addition, the analysis of DTA measurements of mechanically activated samples indicates that the mechanical activation leads to intensification of the cordierite formation through an increase in concentration of surface defects and an increase in grain contact surface in the initial powder.
PB  - Springer
T2  - Journal of Thermal Analysis and Calorimetry
T1  - Kinetics of thermally activated processes in cordierite-based ceramics
SP  - 2989
EP  - 2998
VL  - 138
DO  - 10.1007/s10973-018-7924-1
UR  - https://hdl.handle.net/21.15107/rcub_dais_7048
ER  - 

@article{
author = "Obradović, Nina and Blagojević, Vladimir A. and Filipović, Suzana and Đorđević, Nataša and Kosanović, Darko and Marković, Smilja and Kachlik, Martin and Maca, Karel and Pavlović, Vladimir B.",
year = "2019",
abstract = "Thermally activated processes in cordierite-based ceramics were investigated to determine the effect of the mechanical activation and the addition of TeO2 on kinetic and thermodynamic parameters of these processes. Using a combination of dilatometry and DTA measurements in the 100–1400 °C temperature range, it was established that both the mechanical activation and the addition of TeO2 have a significant effect on processes in cordierite-based ceramics. A combination of 5 mass% addition of TeO2 and mechanical activation for 40 min reduced the sintering temperature of cordierite ceramics to around 1100 °C. In addition, the analysis of DTA measurements of mechanically activated samples indicates that the mechanical activation leads to intensification of the cordierite formation through an increase in concentration of surface defects and an increase in grain contact surface in the initial powder.",
publisher = "Springer",
journal = "Journal of Thermal Analysis and Calorimetry",
title = "Kinetics of thermally activated processes in cordierite-based ceramics",
pages = "2989-2998",
volume = "138",
doi = "10.1007/s10973-018-7924-1",
url = "https://hdl.handle.net/21.15107/rcub_dais_7048"
}

Obradović, N., Blagojević, V. A., Filipović, S., Đorđević, N., Kosanović, D., Marković, S., Kachlik, M., Maca, K.,& Pavlović, V. B.. (2019). Kinetics of thermally activated processes in cordierite-based ceramics. in Journal of Thermal Analysis and Calorimetry
Springer., 138, 2989-2998.
https://doi.org/10.1007/s10973-018-7924-1
https://hdl.handle.net/21.15107/rcub_dais_7048

Obradović N, Blagojević VA, Filipović S, Đorđević N, Kosanović D, Marković S, Kachlik M, Maca K, Pavlović VB. Kinetics of thermally activated processes in cordierite-based ceramics. in Journal of Thermal Analysis and Calorimetry. 2019;138:2989-2998.
doi:10.1007/s10973-018-7924-1
https://hdl.handle.net/21.15107/rcub_dais_7048 .

Obradović, Nina, Blagojević, Vladimir A., Filipović, Suzana, Đorđević, Nataša, Kosanović, Darko, Marković, Smilja, Kachlik, Martin, Maca, Karel, Pavlović, Vladimir B., "Kinetics of thermally activated processes in cordierite-based ceramics" in Journal of Thermal Analysis and Calorimetry, 138 (2019):2989-2998,
https://doi.org/10.1007/s10973-018-7924-1 .,
https://hdl.handle.net/21.15107/rcub_dais_7048 .

TY  - JOUR
AU  - Terzić, Anja
AU  - Đorđević, Nataša
AU  - Mitrić, Miodrag
AU  - Marković, Smilja
AU  - Đorđević, Katarina
AU  - Pavlović, Vladimir B.
PY  - 2017
UR  - https://dais.sanu.ac.rs/123456789/2393
AB  - Due to pozzolanic characteristics, fly ash is commonly used as a cement replacement in construction composites. Addition of natural clays with sorption ability (i.e. zeolite and bentonite) in to the fly ash based construction materials is of both scientific and industrial interest. Namely, due to the application of sorptive clay minerals, it is possible to immobilize toxic heavy metals from the composite structure. The thermal compatibility of fly ash and zeolite, as well as fly ash and bentonite, within the composite was observed during sintering procedure. The starting components were used in 1:1 ratio and they were applied without additional mechanical treatment. The used compaction pressure for the tablets was 2 t•cm-2. The sintering process was conducted at 1000ºC and 1200ºC for two hours in the air atmosphere. The mineralogical phase composition of the non-treated and sintered samples was analyzed using X-ray diffraction method. Scanning electron microscopy was applied in the analysis of the microstructure of starting and sintered samples. The thermal behavior was observed via DTA method. The influence of temperature on the properties of fly ash-zeolite and fly ash-bentonite composites was investigated
PB  - International Institute for the Science of Sintering
T2  - Science of Sintering
T1  - Sintering of fly ash based composites with zeolite and bentonite addition for application in construction materials
SP  - 23
EP  - 37
VL  - 49
IS  - 1
DO  - 10.2298/SOS1701023T
UR  - https://hdl.handle.net/21.15107/rcub_dais_2393
ER  - 

@article{
author = "Terzić, Anja and Đorđević, Nataša and Mitrić, Miodrag and Marković, Smilja and Đorđević, Katarina and Pavlović, Vladimir B.",
year = "2017",
abstract = "Due to pozzolanic characteristics, fly ash is commonly used as a cement replacement in construction composites. Addition of natural clays with sorption ability (i.e. zeolite and bentonite) in to the fly ash based construction materials is of both scientific and industrial interest. Namely, due to the application of sorptive clay minerals, it is possible to immobilize toxic heavy metals from the composite structure. The thermal compatibility of fly ash and zeolite, as well as fly ash and bentonite, within the composite was observed during sintering procedure. The starting components were used in 1:1 ratio and they were applied without additional mechanical treatment. The used compaction pressure for the tablets was 2 t•cm-2. The sintering process was conducted at 1000ºC and 1200ºC for two hours in the air atmosphere. The mineralogical phase composition of the non-treated and sintered samples was analyzed using X-ray diffraction method. Scanning electron microscopy was applied in the analysis of the microstructure of starting and sintered samples. The thermal behavior was observed via DTA method. The influence of temperature on the properties of fly ash-zeolite and fly ash-bentonite composites was investigated",
publisher = "International Institute for the Science of Sintering",
journal = "Science of Sintering",
title = "Sintering of fly ash based composites with zeolite and bentonite addition for application in construction materials",
pages = "23-37",
volume = "49",
number = "1",
doi = "10.2298/SOS1701023T",
url = "https://hdl.handle.net/21.15107/rcub_dais_2393"
}

Terzić, A., Đorđević, N., Mitrić, M., Marković, S., Đorđević, K.,& Pavlović, V. B.. (2017). Sintering of fly ash based composites with zeolite and bentonite addition for application in construction materials. in Science of Sintering
International Institute for the Science of Sintering., 49(1), 23-37.
https://doi.org/10.2298/SOS1701023T
https://hdl.handle.net/21.15107/rcub_dais_2393

Terzić A, Đorđević N, Mitrić M, Marković S, Đorđević K, Pavlović VB. Sintering of fly ash based composites with zeolite and bentonite addition for application in construction materials. in Science of Sintering. 2017;49(1):23-37.
doi:10.2298/SOS1701023T
https://hdl.handle.net/21.15107/rcub_dais_2393 .

Terzić, Anja, Đorđević, Nataša, Mitrić, Miodrag, Marković, Smilja, Đorđević, Katarina, Pavlović, Vladimir B., "Sintering of fly ash based composites with zeolite and bentonite addition for application in construction materials" in Science of Sintering, 49, no. 1 (2017):23-37,
https://doi.org/10.2298/SOS1701023T .,
https://hdl.handle.net/21.15107/rcub_dais_2393 .

TY  - CONF
AU  - Obradović, Nina
AU  - Đorđević, Nataša
AU  - Kosanović, Darko
AU  - Filipović, Suzana
AU  - Kachlik, Martin
AU  - Maca, Karel
AU  - Olćan, Dragan
AU  - Đorđević, Antonije
AU  - Pavlović, Vladimir B.
PY  - 2017
UR  - https://dais.sanu.ac.rs/123456789/15444
AB  - In this study, sintering of two systems was investigated in parallel, pure cordierite 2MgO:2Al2O3:5SiO2, and cordierite with addition of 5 mass % TeO2. Green bodies were prepared from powder mixtures mechanically activated for 0, 10 and 40minutes by uniaxial pressing at 20 MPa followed by cold isostatic pressing (CIP) at 1000 MPa. The pressure-less sintering of these specimens was performed at a temperature of 1350 oC for 1 h, with 10 oC/min heating rate. Densities over 96 % of theoretical values were obtained for samples activated for 40 minutes. XRD measurements of MAS-40 sintered sample pointed at a mixture that consisted of several phases, majority of cordierite (> 73 %), spinel MgAl2O4 (> 22 %), ZrSiO4 (2.5 %), and Al2O3 (1.8%), while XRD pattern of MAS-40-TeO2 contained majority of cordierite (> 72 %), spinel MgAl2O4 (> 23 %), ZrSiO4 (1.9 %), and Al2O3 (1.9 %). The relative permittivities of the samples were measured in an open test fixture. The results for the real part of the complex relative permittivity of the samples, measured at 200 MHz, are shown in Table I. The loss tangent for all samples was very small, below the resolution of the measurement setup (0.005).
There is a strong correlation between the relative permittivity and the density, which agrees with our previous results.
PB  - Belgrade : Materials Research Society of Serbia
C3  - Programme and The Book of Abstracts / Nineteenth Annual Conference YUCOMAT 2017, Herceg Novi, September 4-8, 2017
T1  - Characterization of pressure-less sintered MgO-Al2O3-SiO2-TeO2 system
SP  - 70
EP  - 70
UR  - https://hdl.handle.net/21.15107/rcub_dais_15444
ER  - 

@conference{
author = "Obradović, Nina and Đorđević, Nataša and Kosanović, Darko and Filipović, Suzana and Kachlik, Martin and Maca, Karel and Olćan, Dragan and Đorđević, Antonije and Pavlović, Vladimir B.",
year = "2017",
abstract = "In this study, sintering of two systems was investigated in parallel, pure cordierite 2MgO:2Al2O3:5SiO2, and cordierite with addition of 5 mass % TeO2. Green bodies were prepared from powder mixtures mechanically activated for 0, 10 and 40minutes by uniaxial pressing at 20 MPa followed by cold isostatic pressing (CIP) at 1000 MPa. The pressure-less sintering of these specimens was performed at a temperature of 1350 oC for 1 h, with 10 oC/min heating rate. Densities over 96 % of theoretical values were obtained for samples activated for 40 minutes. XRD measurements of MAS-40 sintered sample pointed at a mixture that consisted of several phases, majority of cordierite (> 73 %), spinel MgAl2O4 (> 22 %), ZrSiO4 (2.5 %), and Al2O3 (1.8%), while XRD pattern of MAS-40-TeO2 contained majority of cordierite (> 72 %), spinel MgAl2O4 (> 23 %), ZrSiO4 (1.9 %), and Al2O3 (1.9 %). The relative permittivities of the samples were measured in an open test fixture. The results for the real part of the complex relative permittivity of the samples, measured at 200 MHz, are shown in Table I. The loss tangent for all samples was very small, below the resolution of the measurement setup (0.005).
There is a strong correlation between the relative permittivity and the density, which agrees with our previous results.",
publisher = "Belgrade : Materials Research Society of Serbia",
journal = "Programme and The Book of Abstracts / Nineteenth Annual Conference YUCOMAT 2017, Herceg Novi, September 4-8, 2017",
title = "Characterization of pressure-less sintered MgO-Al2O3-SiO2-TeO2 system",
pages = "70-70",
url = "https://hdl.handle.net/21.15107/rcub_dais_15444"
}

Obradović, N., Đorđević, N., Kosanović, D., Filipović, S., Kachlik, M., Maca, K., Olćan, D., Đorđević, A.,& Pavlović, V. B.. (2017). Characterization of pressure-less sintered MgO-Al2O3-SiO2-TeO2 system. in Programme and The Book of Abstracts / Nineteenth Annual Conference YUCOMAT 2017, Herceg Novi, September 4-8, 2017
Belgrade : Materials Research Society of Serbia., 70-70.
https://hdl.handle.net/21.15107/rcub_dais_15444

Obradović N, Đorđević N, Kosanović D, Filipović S, Kachlik M, Maca K, Olćan D, Đorđević A, Pavlović VB. Characterization of pressure-less sintered MgO-Al2O3-SiO2-TeO2 system. in Programme and The Book of Abstracts / Nineteenth Annual Conference YUCOMAT 2017, Herceg Novi, September 4-8, 2017. 2017;:70-70.
https://hdl.handle.net/21.15107/rcub_dais_15444 .

Obradović, Nina, Đorđević, Nataša, Kosanović, Darko, Filipović, Suzana, Kachlik, Martin, Maca, Karel, Olćan, Dragan, Đorđević, Antonije, Pavlović, Vladimir B., "Characterization of pressure-less sintered MgO-Al2O3-SiO2-TeO2 system" in Programme and The Book of Abstracts / Nineteenth Annual Conference YUCOMAT 2017, Herceg Novi, September 4-8, 2017 (2017):70-70,
https://hdl.handle.net/21.15107/rcub_dais_15444 .

TY  - JOUR
AU  - Filipović, Suzana
AU  - Obradović, Nina
AU  - Đorđević, Nataša
AU  - Kosanović, Darko
AU  - Marković, Smilja
AU  - Mitrić, Miodrag N.
AU  - Pavlović, Vladimir B.
PY  - 2016
UR  - https://dais.sanu.ac.rs/123456789/15076
AB  - Ova istraživanja posvećena su uticaju mehaničke aktivacije na strukturu kordijeritne smeše 2MgO+2Al2O3+5SiO2. Praćena su i testirana dva paralelna sistema, jedan bez, i drugi u prisustvu 5 masenih % TeO2 kao aditiva. Mehanička aktivacija prahova vršena je u visoko energetskom mlinu sa kuglama u vremenskom intervalu od 0 do 40 minuta. Tokom aktivacije došlo je do reakcije polaznih komponenti u čvrstoj fazi, pri čemu su nastala intermedijarna jedinjenja. Metoda rendgenske difrakcije je korišćena radi identifikacije faznog sastava tokom reakcije, dok su SEM i PSA metode korišćene za praćenje promene morfologije mehanički tretiranih prahova. Cilj aktivacije polaznih prahova je sniženje temperature i mogućnost da se skrati vreme trajanja procesa sinterovanja u postupku dobijanja krajnjeg proizvoda.
AB  - Cordierite 2MgO+2Al2O3+5SiO2 is frequently used ceramic material, that is commonly used as a carrier of electrical components due to its low dielectric constant (~ 5), and low temperature thermal expansion coefficient (20·10-7 oC-1). In order to accelerate the process of sintering, 5.00 mass% TeO2 was added to the starting mixtures. System was tested in two parallel mixtures, one with no additives, and the other one with TeO2. The mechanical activation of the both mixtures was performed in a highenergy ball mill in time intervals from 0 to 40 min with ball to powder mass ratio 1:40. The particle size analysis (PSA) was employed in order to determine the changes in the particle size of the mechanically treated powders. The phase composition of the starting powders as well as microstructures was analyzed by the means of X-ray diffraction method and SEM.
PB  - Beograd : Savez inženjera i tehničara Srbije
T2  - Tehnika
T1  - Uticaj mehaničke aktivacije na sistem MgO-Al2O3-SiO2 u prisustvu aditiva TeO2
T1  - Influence of mechanical activation on MgO-Al2O3-SiO2 system in the presence of TeO2 additive
SP  - 797
EP  - 802
VL  - 71
IS  - 6
DO  - 10.5937/tehnika1606797F
UR  - https://hdl.handle.net/21.15107/rcub_dais_15076
ER  - 

@article{
author = "Filipović, Suzana and Obradović, Nina and Đorđević, Nataša and Kosanović, Darko and Marković, Smilja and Mitrić, Miodrag N. and Pavlović, Vladimir B.",
year = "2016",
abstract = "Ova istraživanja posvećena su uticaju mehaničke aktivacije na strukturu kordijeritne smeše 2MgO+2Al2O3+5SiO2. Praćena su i testirana dva paralelna sistema, jedan bez, i drugi u prisustvu 5 masenih % TeO2 kao aditiva. Mehanička aktivacija prahova vršena je u visoko energetskom mlinu sa kuglama u vremenskom intervalu od 0 do 40 minuta. Tokom aktivacije došlo je do reakcije polaznih komponenti u čvrstoj fazi, pri čemu su nastala intermedijarna jedinjenja. Metoda rendgenske difrakcije je korišćena radi identifikacije faznog sastava tokom reakcije, dok su SEM i PSA metode korišćene za praćenje promene morfologije mehanički tretiranih prahova. Cilj aktivacije polaznih prahova je sniženje temperature i mogućnost da se skrati vreme trajanja procesa sinterovanja u postupku dobijanja krajnjeg proizvoda., Cordierite 2MgO+2Al2O3+5SiO2 is frequently used ceramic material, that is commonly used as a carrier of electrical components due to its low dielectric constant (~ 5), and low temperature thermal expansion coefficient (20·10-7 oC-1). In order to accelerate the process of sintering, 5.00 mass% TeO2 was added to the starting mixtures. System was tested in two parallel mixtures, one with no additives, and the other one with TeO2. The mechanical activation of the both mixtures was performed in a highenergy ball mill in time intervals from 0 to 40 min with ball to powder mass ratio 1:40. The particle size analysis (PSA) was employed in order to determine the changes in the particle size of the mechanically treated powders. The phase composition of the starting powders as well as microstructures was analyzed by the means of X-ray diffraction method and SEM.",
publisher = "Beograd : Savez inženjera i tehničara Srbije",
journal = "Tehnika",
title = "Uticaj mehaničke aktivacije na sistem MgO-Al2O3-SiO2 u prisustvu aditiva TeO2, Influence of mechanical activation on MgO-Al2O3-SiO2 system in the presence of TeO2 additive",
pages = "797-802",
volume = "71",
number = "6",
doi = "10.5937/tehnika1606797F",
url = "https://hdl.handle.net/21.15107/rcub_dais_15076"
}

Filipović, S., Obradović, N., Đorđević, N., Kosanović, D., Marković, S., Mitrić, M. N.,& Pavlović, V. B.. (2016). Uticaj mehaničke aktivacije na sistem MgO-Al2O3-SiO2 u prisustvu aditiva TeO2. in Tehnika
Beograd : Savez inženjera i tehničara Srbije., 71(6), 797-802.
https://doi.org/10.5937/tehnika1606797F
https://hdl.handle.net/21.15107/rcub_dais_15076

Filipović S, Obradović N, Đorđević N, Kosanović D, Marković S, Mitrić MN, Pavlović VB. Uticaj mehaničke aktivacije na sistem MgO-Al2O3-SiO2 u prisustvu aditiva TeO2. in Tehnika. 2016;71(6):797-802.
doi:10.5937/tehnika1606797F
https://hdl.handle.net/21.15107/rcub_dais_15076 .

Filipović, Suzana, Obradović, Nina, Đorđević, Nataša, Kosanović, Darko, Marković, Smilja, Mitrić, Miodrag N., Pavlović, Vladimir B., "Uticaj mehaničke aktivacije na sistem MgO-Al2O3-SiO2 u prisustvu aditiva TeO2" in Tehnika, 71, no. 6 (2016):797-802,
https://doi.org/10.5937/tehnika1606797F .,
https://hdl.handle.net/21.15107/rcub_dais_15076 .

TY  - JOUR
AU  - Filipović, Suzana
AU  - Obradović, Nina
AU  - Đorđević, Nataša
AU  - Kosanović, Darko
AU  - Marković, Smilja
AU  - Mitrić, Miodrag N.
AU  - Pavlović, Vladimir B.
PY  - 2016
UR  - https://dais.sanu.ac.rs/123456789/15078
AB  - Ova istraživanja posvećena su uticaju mehaničke aktivacije na strukturu kordijeritne smeše 2MgO+2Al2O3+5SiO2. Praćena su i testirana dva paralelna sistema, jedan bez, i drugi u prisustvu 5 masenih % TeO2 kao aditiva. Mehanička aktivacija prahova vršena je u visoko energetskom mlinu sa kuglama u vremenskom intervalu od 0 do 40 minuta. Tokom aktivacije došlo je do reakcije polaznih komponenti u čvrstoj fazi, pri čemu su nastala intermedijarna jedinjenja. Metoda rendgenske difrakcije je korišćena radi identifikacije faznog sastava tokom reakcije, dok su SEM i PSA metode korišćene za praćenje promene morfologije mehanički tretiranih prahova. Cilj aktivacije polaznih prahova je sniženje temperature i mogućnost da se skrati vreme trajanja procesa sinterovanja u postupku dobijanja krajnjeg proizvoda.
AB  - Cordierite 2MgO+2Al2O3+5SiO2 is frequently used ceramic material, that is commonly used as a carrier of electrical components due to its low dielectric constant (~ 5), and low temperature thermal expansion coefficient (20·10-7 oC-1). In order to accelerate the process of sintering, 5.00 mass% TeO2 was added to the starting mixtures. System was tested in two parallel mixtures, one with no additives, and the other one with TeO2. The mechanical activation of the both mixtures was performed in a highenergy ball mill in time intervals from 0 to 40 min with ball to powder mass ratio 1:40. The particle size analysis (PSA) was employed in order to determine the changes in the particle size of the mechanically treated powders. The phase composition of the starting powders as well as microstructures was analyzed by the means of X-ray diffraction method and SEM.
PB  - Savez inženjera i tehničara Srbije, Beograd
T2  - Tehnika
T1  - Uticaj mehaničke aktivacije na sistem MgO-Al2O3-SiO2 u prisustvu aditiva TeO2
T1  - Influence of mechanical activation on MgO-Al2O3-SiO2 system in the presence of TeO2 additive
SP  - 797
EP  - 802
VL  - 71
IS  - 6
DO  - 10.5937/tehnika1606797F
UR  - https://hdl.handle.net/21.15107/rcub_dais_15078
ER  - 

@article{
author = "Filipović, Suzana and Obradović, Nina and Đorđević, Nataša and Kosanović, Darko and Marković, Smilja and Mitrić, Miodrag N. and Pavlović, Vladimir B.",
year = "2016",
abstract = "Ova istraživanja posvećena su uticaju mehaničke aktivacije na strukturu kordijeritne smeše 2MgO+2Al2O3+5SiO2. Praćena su i testirana dva paralelna sistema, jedan bez, i drugi u prisustvu 5 masenih % TeO2 kao aditiva. Mehanička aktivacija prahova vršena je u visoko energetskom mlinu sa kuglama u vremenskom intervalu od 0 do 40 minuta. Tokom aktivacije došlo je do reakcije polaznih komponenti u čvrstoj fazi, pri čemu su nastala intermedijarna jedinjenja. Metoda rendgenske difrakcije je korišćena radi identifikacije faznog sastava tokom reakcije, dok su SEM i PSA metode korišćene za praćenje promene morfologije mehanički tretiranih prahova. Cilj aktivacije polaznih prahova je sniženje temperature i mogućnost da se skrati vreme trajanja procesa sinterovanja u postupku dobijanja krajnjeg proizvoda., Cordierite 2MgO+2Al2O3+5SiO2 is frequently used ceramic material, that is commonly used as a carrier of electrical components due to its low dielectric constant (~ 5), and low temperature thermal expansion coefficient (20·10-7 oC-1). In order to accelerate the process of sintering, 5.00 mass% TeO2 was added to the starting mixtures. System was tested in two parallel mixtures, one with no additives, and the other one with TeO2. The mechanical activation of the both mixtures was performed in a highenergy ball mill in time intervals from 0 to 40 min with ball to powder mass ratio 1:40. The particle size analysis (PSA) was employed in order to determine the changes in the particle size of the mechanically treated powders. The phase composition of the starting powders as well as microstructures was analyzed by the means of X-ray diffraction method and SEM.",
publisher = "Savez inženjera i tehničara Srbije, Beograd",
journal = "Tehnika",
title = "Uticaj mehaničke aktivacije na sistem MgO-Al2O3-SiO2 u prisustvu aditiva TeO2, Influence of mechanical activation on MgO-Al2O3-SiO2 system in the presence of TeO2 additive",
pages = "797-802",
volume = "71",
number = "6",
doi = "10.5937/tehnika1606797F",
url = "https://hdl.handle.net/21.15107/rcub_dais_15078"
}

Filipović, S., Obradović, N., Đorđević, N., Kosanović, D., Marković, S., Mitrić, M. N.,& Pavlović, V. B.. (2016). Uticaj mehaničke aktivacije na sistem MgO-Al2O3-SiO2 u prisustvu aditiva TeO2. in Tehnika
Savez inženjera i tehničara Srbije, Beograd., 71(6), 797-802.
https://doi.org/10.5937/tehnika1606797F
https://hdl.handle.net/21.15107/rcub_dais_15078

Filipović S, Obradović N, Đorđević N, Kosanović D, Marković S, Mitrić MN, Pavlović VB. Uticaj mehaničke aktivacije na sistem MgO-Al2O3-SiO2 u prisustvu aditiva TeO2. in Tehnika. 2016;71(6):797-802.
doi:10.5937/tehnika1606797F
https://hdl.handle.net/21.15107/rcub_dais_15078 .

Filipović, Suzana, Obradović, Nina, Đorđević, Nataša, Kosanović, Darko, Marković, Smilja, Mitrić, Miodrag N., Pavlović, Vladimir B., "Uticaj mehaničke aktivacije na sistem MgO-Al2O3-SiO2 u prisustvu aditiva TeO2" in Tehnika, 71, no. 6 (2016):797-802,
https://doi.org/10.5937/tehnika1606797F .,
https://hdl.handle.net/21.15107/rcub_dais_15078 .

TY  - JOUR
AU  - Obradović, Nina
AU  - Filipović, Suzana
AU  - Đorđević, Nataša
AU  - Kosanović, Darko
AU  - Pavlović, Vladimir B.
AU  - Olćan, Dragan
AU  - Đorđević, Antonije
AU  - Kachlik, Martin
AU  - Maca, Karel
PY  - 2016
UR  - https://dais.sanu.ac.rs/123456789/2314
AB  - Cordierite-based ceramic materials are attracting much interest for their various applications in industry, for manufacturing multilayer circuit boards, catalytic converters, filters, thermal insulation, kiln furniture, components of portable electronic devices, etc. In order to reduce production costs and modify cordierite-based materials, mechanical activation can be used. In this study, microstructural and electrical properties of mechanically activated MgO-Al2O3-SiO2 system have been analyzed. The mixtures of MgO-Al2O3-SiO2 powders were mechanically activated in a planetary ball mill for the time periods from 0 to 160 min. Morphological investigations have been performed on the obtained powders. The effects of activation and two-step sintering process on microstructure were investigated by scanning electron microscopy (SEM). Electrical measurements showed variations of the dielectric constant (εr) and loss tangent (tan δ) as a function of time of mechanical treatment.
T2  - Science of Sintering
T1  - Microstructural and electrical properties of cordierite-based ceramics obtained after two-step sintering technique
SP  - 157
EP  - 165
VL  - 48
IS  - 2
DO  - 10.2298/SOS1602157O
UR  - https://hdl.handle.net/21.15107/rcub_dais_2314
ER  - 

@article{
author = "Obradović, Nina and Filipović, Suzana and Đorđević, Nataša and Kosanović, Darko and Pavlović, Vladimir B. and Olćan, Dragan and Đorđević, Antonije and Kachlik, Martin and Maca, Karel",
year = "2016",
abstract = "Cordierite-based ceramic materials are attracting much interest for their various applications in industry, for manufacturing multilayer circuit boards, catalytic converters, filters, thermal insulation, kiln furniture, components of portable electronic devices, etc. In order to reduce production costs and modify cordierite-based materials, mechanical activation can be used. In this study, microstructural and electrical properties of mechanically activated MgO-Al2O3-SiO2 system have been analyzed. The mixtures of MgO-Al2O3-SiO2 powders were mechanically activated in a planetary ball mill for the time periods from 0 to 160 min. Morphological investigations have been performed on the obtained powders. The effects of activation and two-step sintering process on microstructure were investigated by scanning electron microscopy (SEM). Electrical measurements showed variations of the dielectric constant (εr) and loss tangent (tan δ) as a function of time of mechanical treatment.",
journal = "Science of Sintering",
title = "Microstructural and electrical properties of cordierite-based ceramics obtained after two-step sintering technique",
pages = "157-165",
volume = "48",
number = "2",
doi = "10.2298/SOS1602157O",
url = "https://hdl.handle.net/21.15107/rcub_dais_2314"
}

Obradović, N., Filipović, S., Đorđević, N., Kosanović, D., Pavlović, V. B., Olćan, D., Đorđević, A., Kachlik, M.,& Maca, K.. (2016). Microstructural and electrical properties of cordierite-based ceramics obtained after two-step sintering technique. in Science of Sintering, 48(2), 157-165.
https://doi.org/10.2298/SOS1602157O
https://hdl.handle.net/21.15107/rcub_dais_2314

Obradović N, Filipović S, Đorđević N, Kosanović D, Pavlović VB, Olćan D, Đorđević A, Kachlik M, Maca K. Microstructural and electrical properties of cordierite-based ceramics obtained after two-step sintering technique. in Science of Sintering. 2016;48(2):157-165.
doi:10.2298/SOS1602157O
https://hdl.handle.net/21.15107/rcub_dais_2314 .

Obradović, Nina, Filipović, Suzana, Đorđević, Nataša, Kosanović, Darko, Pavlović, Vladimir B., Olćan, Dragan, Đorđević, Antonije, Kachlik, Martin, Maca, Karel, "Microstructural and electrical properties of cordierite-based ceramics obtained after two-step sintering technique" in Science of Sintering, 48, no. 2 (2016):157-165,
https://doi.org/10.2298/SOS1602157O .,
https://hdl.handle.net/21.15107/rcub_dais_2314 .

TY  - JOUR
AU  - Obradović, Nina
AU  - Đorđević, Nataša
AU  - Filipović, Suzana
AU  - Kosanović, Darko
AU  - Pavlović, Vladimir B.
AU  - Olćan, Dragan
AU  - Đorđević, Antonije
AU  - Kachlik, Martin
AU  - Maca, Karel
PY  - 2016
UR  - https://dais.sanu.ac.rs/123456789/15996
AB  - Cordierite-based ceramic materials are attracting much interest for their various applications in industry, for manufacturing multilayer circuit boards, catalytic converters, filters, thermal insulation, kiln furniture, components of portable electronic devices, etc. In order to reduce production costs and modify cordierite-based materials, mechanical activation can be used. In this study, microstructural and electrical properties of mechanically activated MgO-Al2O3-SiO2 system have been analyzed. The mixtures of MgO-Al2O3-SiO2 powders were mechanically activated in a planetary ball mill for the time periods from 0 to 160 min. Morphological investigations have been performed on the obtained powders. The effects of activation and two-step sintering process on microstructure were investigated by scanning electron microscopy (SEM). Electrical measurements showed variations of the dielectric constant (εr) and loss tangent (tan δ) as a function of time of mechanical treatment.
PB  - Insternational Institute for the Science of Sintering
T2  - Science of Sintering
T1  - Microstructural and electrical properties of cordierite-based ceramics obtained after two-step sintering technique
SP  - 157
EP  - 165
VL  - 48
IS  - 2
DO  - 10.2298/SOS1602157O
UR  - https://hdl.handle.net/21.15107/rcub_dais_15996
ER  - 

@article{
author = "Obradović, Nina and Đorđević, Nataša and Filipović, Suzana and Kosanović, Darko and Pavlović, Vladimir B. and Olćan, Dragan and Đorđević, Antonije and Kachlik, Martin and Maca, Karel",
year = "2016",
abstract = "Cordierite-based ceramic materials are attracting much interest for their various applications in industry, for manufacturing multilayer circuit boards, catalytic converters, filters, thermal insulation, kiln furniture, components of portable electronic devices, etc. In order to reduce production costs and modify cordierite-based materials, mechanical activation can be used. In this study, microstructural and electrical properties of mechanically activated MgO-Al2O3-SiO2 system have been analyzed. The mixtures of MgO-Al2O3-SiO2 powders were mechanically activated in a planetary ball mill for the time periods from 0 to 160 min. Morphological investigations have been performed on the obtained powders. The effects of activation and two-step sintering process on microstructure were investigated by scanning electron microscopy (SEM). Electrical measurements showed variations of the dielectric constant (εr) and loss tangent (tan δ) as a function of time of mechanical treatment.",
publisher = "Insternational Institute for the Science of Sintering",
journal = "Science of Sintering",
title = "Microstructural and electrical properties of cordierite-based ceramics obtained after two-step sintering technique",
pages = "157-165",
volume = "48",
number = "2",
doi = "10.2298/SOS1602157O",
url = "https://hdl.handle.net/21.15107/rcub_dais_15996"
}

Obradović, N., Đorđević, N., Filipović, S., Kosanović, D., Pavlović, V. B., Olćan, D., Đorđević, A., Kachlik, M.,& Maca, K.. (2016). Microstructural and electrical properties of cordierite-based ceramics obtained after two-step sintering technique. in Science of Sintering
Insternational Institute for the Science of Sintering., 48(2), 157-165.
https://doi.org/10.2298/SOS1602157O
https://hdl.handle.net/21.15107/rcub_dais_15996

Obradović N, Đorđević N, Filipović S, Kosanović D, Pavlović VB, Olćan D, Đorđević A, Kachlik M, Maca K. Microstructural and electrical properties of cordierite-based ceramics obtained after two-step sintering technique. in Science of Sintering. 2016;48(2):157-165.
doi:10.2298/SOS1602157O
https://hdl.handle.net/21.15107/rcub_dais_15996 .

Obradović, Nina, Đorđević, Nataša, Filipović, Suzana, Kosanović, Darko, Pavlović, Vladimir B., Olćan, Dragan, Đorđević, Antonije, Kachlik, Martin, Maca, Karel, "Microstructural and electrical properties of cordierite-based ceramics obtained after two-step sintering technique" in Science of Sintering, 48, no. 2 (2016):157-165,
https://doi.org/10.2298/SOS1602157O .,
https://hdl.handle.net/21.15107/rcub_dais_15996 .

TY  - JOUR
AU  - Obradović, Nina
AU  - Đorđević, Nataša
AU  - Filipović, Suzana
AU  - Marković, Smilja
AU  - Kosanović, Darko
AU  - Mitrić, Miodrag
AU  - Pavlović, Vladimir B.
PY  - 2016
UR  - https://dais.sanu.ac.rs/123456789/15995
AB  - Since cordierite, 2MgO·2Al2O3·5SiO2 (MAS), is a very useful high-temperature ceramic material, it is important to decrease its sintering temperature. In order to accelerate the process of sintering, 5.00 mass% MoO3 was added to the starting mixtures. The mechanical activation of the starting mixtures was performed in a high-energy ball mill in time intervals from 0 to 160 min. After the activation, starting mixtures were sintered at 1300 °C for 2 h. In order to determine the impact of mechanical activation on particle size distribution and powders morphology, the mechanically treated powders were characterized by a laser light-scattering particle size analyzer and scanning electron microscopy. The phase composition of the starting mixtures and sintered samples was analyzed by the X-ray diffraction method. In order to determine temperature intervals of chemical reactions and phase transitions, differential thermal analyses (DTA) and thermo-gravimetric analysis were used. Kissinger’s equation was employed to calculate apparent activation energies of various processes that occur within the system during heating. Based on the obtained DTA results, it was established that mechanical activation along with MoO3 additive has influence on sintering temperature which was decreased for more than 100 °C, comparing to the literature data.
PB  - Springer
T2  - Journal of Thermal Analysis and Calorimetry
T1  - Reaction kinetics of mechanically activated cordierite-based ceramics studied via DTA
SP  - 667
EP  - 673
VL  - 124
IS  - 2
DO  - 10.1007/s10973-015-5132-9
UR  - https://hdl.handle.net/21.15107/rcub_dais_15995
ER  - 

@article{
author = "Obradović, Nina and Đorđević, Nataša and Filipović, Suzana and Marković, Smilja and Kosanović, Darko and Mitrić, Miodrag and Pavlović, Vladimir B.",
year = "2016",
abstract = "Since cordierite, 2MgO·2Al2O3·5SiO2 (MAS), is a very useful high-temperature ceramic material, it is important to decrease its sintering temperature. In order to accelerate the process of sintering, 5.00 mass% MoO3 was added to the starting mixtures. The mechanical activation of the starting mixtures was performed in a high-energy ball mill in time intervals from 0 to 160 min. After the activation, starting mixtures were sintered at 1300 °C for 2 h. In order to determine the impact of mechanical activation on particle size distribution and powders morphology, the mechanically treated powders were characterized by a laser light-scattering particle size analyzer and scanning electron microscopy. The phase composition of the starting mixtures and sintered samples was analyzed by the X-ray diffraction method. In order to determine temperature intervals of chemical reactions and phase transitions, differential thermal analyses (DTA) and thermo-gravimetric analysis were used. Kissinger’s equation was employed to calculate apparent activation energies of various processes that occur within the system during heating. Based on the obtained DTA results, it was established that mechanical activation along with MoO3 additive has influence on sintering temperature which was decreased for more than 100 °C, comparing to the literature data.",
publisher = "Springer",
journal = "Journal of Thermal Analysis and Calorimetry",
title = "Reaction kinetics of mechanically activated cordierite-based ceramics studied via DTA",
pages = "667-673",
volume = "124",
number = "2",
doi = "10.1007/s10973-015-5132-9",
url = "https://hdl.handle.net/21.15107/rcub_dais_15995"
}

Obradović, N., Đorđević, N., Filipović, S., Marković, S., Kosanović, D., Mitrić, M.,& Pavlović, V. B.. (2016). Reaction kinetics of mechanically activated cordierite-based ceramics studied via DTA. in Journal of Thermal Analysis and Calorimetry
Springer., 124(2), 667-673.
https://doi.org/10.1007/s10973-015-5132-9
https://hdl.handle.net/21.15107/rcub_dais_15995

Obradović N, Đorđević N, Filipović S, Marković S, Kosanović D, Mitrić M, Pavlović VB. Reaction kinetics of mechanically activated cordierite-based ceramics studied via DTA. in Journal of Thermal Analysis and Calorimetry. 2016;124(2):667-673.
doi:10.1007/s10973-015-5132-9
https://hdl.handle.net/21.15107/rcub_dais_15995 .

Obradović, Nina, Đorđević, Nataša, Filipović, Suzana, Marković, Smilja, Kosanović, Darko, Mitrić, Miodrag, Pavlović, Vladimir B., "Reaction kinetics of mechanically activated cordierite-based ceramics studied via DTA" in Journal of Thermal Analysis and Calorimetry, 124, no. 2 (2016):667-673,
https://doi.org/10.1007/s10973-015-5132-9 .,
https://hdl.handle.net/21.15107/rcub_dais_15995 .

TY  - CONF
AU  - Đorđević, Nataša
AU  - Obradović, Nina
AU  - Filipović, Suzana
AU  - Kosanović, Darko
AU  - Marković, Smilja
AU  - Mitrić, Miodrag
AU  - Pavlović, Vladimir B.
PY  - 2016
UR  - https://dais.sanu.ac.rs/123456789/894
AB  - Cordierite 2MgO+2Al2O3+5SiO2 is frequently used ceramic material, that is commonly used as a carrier of electrical components due to its low dielectric constant (~ 5), and low temperature thermal expansion coefficient (20•10-7 ºC-1). In order to accelerate the process of sintering, 5.00 mass% TeO2 was added to the starting mixtures. System was tested in two parallel mixtures, one with no added additives, and the other one with TeO2. The mechanical activation of the both mixtures was performed in a high-energy ball mill in time intervals from 0 to 40 min with ball to powder mass ratio 1:40. The particle size analysis (PSA) was employed in order to determine the changes in the particle size of the mechanically treated powders. The phase composition of the starting powders as well as microstructures was analyzed by the means of X-ray diffraction method and SEM.
PB  - Belgrade : Materials Research Society of Serbia
C3  - Programme and The Book of Abstracts / Eighteenth Annual Conference YUCOMAT 2016, Herceg Novi, September 5-10, 2016
T1  - Influence of mechanical activation on the MgO-Al2O3-SiO2 system with TeO2
SP  - 75
EP  - 75
UR  - https://hdl.handle.net/21.15107/rcub_dais_894
ER  - 

@conference{
author = "Đorđević, Nataša and Obradović, Nina and Filipović, Suzana and Kosanović, Darko and Marković, Smilja and Mitrić, Miodrag and Pavlović, Vladimir B.",
year = "2016",
abstract = "Cordierite 2MgO+2Al2O3+5SiO2 is frequently used ceramic material, that is commonly used as a carrier of electrical components due to its low dielectric constant (~ 5), and low temperature thermal expansion coefficient (20•10-7 ºC-1). In order to accelerate the process of sintering, 5.00 mass% TeO2 was added to the starting mixtures. System was tested in two parallel mixtures, one with no added additives, and the other one with TeO2. The mechanical activation of the both mixtures was performed in a high-energy ball mill in time intervals from 0 to 40 min with ball to powder mass ratio 1:40. The particle size analysis (PSA) was employed in order to determine the changes in the particle size of the mechanically treated powders. The phase composition of the starting powders as well as microstructures was analyzed by the means of X-ray diffraction method and SEM.",
publisher = "Belgrade : Materials Research Society of Serbia",
journal = "Programme and The Book of Abstracts / Eighteenth Annual Conference YUCOMAT 2016, Herceg Novi, September 5-10, 2016",
title = "Influence of mechanical activation on the MgO-Al2O3-SiO2 system with TeO2",
pages = "75-75",
url = "https://hdl.handle.net/21.15107/rcub_dais_894"
}

Đorđević, N., Obradović, N., Filipović, S., Kosanović, D., Marković, S., Mitrić, M.,& Pavlović, V. B.. (2016). Influence of mechanical activation on the MgO-Al2O3-SiO2 system with TeO2. in Programme and The Book of Abstracts / Eighteenth Annual Conference YUCOMAT 2016, Herceg Novi, September 5-10, 2016
Belgrade : Materials Research Society of Serbia., 75-75.
https://hdl.handle.net/21.15107/rcub_dais_894

Đorđević N, Obradović N, Filipović S, Kosanović D, Marković S, Mitrić M, Pavlović VB. Influence of mechanical activation on the MgO-Al2O3-SiO2 system with TeO2. in Programme and The Book of Abstracts / Eighteenth Annual Conference YUCOMAT 2016, Herceg Novi, September 5-10, 2016. 2016;:75-75.
https://hdl.handle.net/21.15107/rcub_dais_894 .

Đorđević, Nataša, Obradović, Nina, Filipović, Suzana, Kosanović, Darko, Marković, Smilja, Mitrić, Miodrag, Pavlović, Vladimir B., "Influence of mechanical activation on the MgO-Al2O3-SiO2 system with TeO2" in Programme and The Book of Abstracts / Eighteenth Annual Conference YUCOMAT 2016, Herceg Novi, September 5-10, 2016 (2016):75-75,
https://hdl.handle.net/21.15107/rcub_dais_894 .

TY  - JOUR
AU  - Obradović, Nina
AU  - Filipović, Suzana
AU  - Đorđević, Nataša
AU  - Kosanović, Darko
AU  - Marković, Smilja
AU  - Pavlović, Vladimir B.
AU  - Olćan, Dragan
AU  - Đorđević, Antonije
AU  - Kachlik, Martin
AU  - Maca, Karel
PY  - 2016
UR  - https://dais.sanu.ac.rs/123456789/2322
AB  - The mechanical activation can help reduce production costs and modify cordierite-based materials. In this study, the structure and electrical properties of the mechanically activated MgO-Al2O3-SiO2 system have been analyzed. The mixtures of MgO-Al2O3-SiO2 powders were mechanically activated in a planetary ball mill for time periods ranging from 0 to 160 min. Structural investigations were performed on the obtained powders. The effects of activation and a two-step sintering process on the microstructure and crystal structure were investigated by scanning electron microscopy (SEM) and X-ray diffraction (XRD). The thermal stability was analyzed using DTA. Electrical measurements showed variations of the dielectric constant (εr) and loss tangent (tan δ) as a function of the time of mechanical treatment.
PB  - Elsevier
T2  - Ceramics International
T1  - Effects of mechanical activation and two-step sintering on the structure and electrical properties of cordierite-based ceramics
SP  - 13909
EP  - 13918
VL  - 42
IS  - 12
DO  - 10.1016/j.ceramint.2016.05.201
UR  - https://hdl.handle.net/21.15107/rcub_dais_2322
ER  - 

@article{
author = "Obradović, Nina and Filipović, Suzana and Đorđević, Nataša and Kosanović, Darko and Marković, Smilja and Pavlović, Vladimir B. and Olćan, Dragan and Đorđević, Antonije and Kachlik, Martin and Maca, Karel",
year = "2016",
abstract = "The mechanical activation can help reduce production costs and modify cordierite-based materials. In this study, the structure and electrical properties of the mechanically activated MgO-Al2O3-SiO2 system have been analyzed. The mixtures of MgO-Al2O3-SiO2 powders were mechanically activated in a planetary ball mill for time periods ranging from 0 to 160 min. Structural investigations were performed on the obtained powders. The effects of activation and a two-step sintering process on the microstructure and crystal structure were investigated by scanning electron microscopy (SEM) and X-ray diffraction (XRD). The thermal stability was analyzed using DTA. Electrical measurements showed variations of the dielectric constant (εr) and loss tangent (tan δ) as a function of the time of mechanical treatment.",
publisher = "Elsevier",
journal = "Ceramics International",
title = "Effects of mechanical activation and two-step sintering on the structure and electrical properties of cordierite-based ceramics",
pages = "13909-13918",
volume = "42",
number = "12",
doi = "10.1016/j.ceramint.2016.05.201",
url = "https://hdl.handle.net/21.15107/rcub_dais_2322"
}

Obradović, N., Filipović, S., Đorđević, N., Kosanović, D., Marković, S., Pavlović, V. B., Olćan, D., Đorđević, A., Kachlik, M.,& Maca, K.. (2016). Effects of mechanical activation and two-step sintering on the structure and electrical properties of cordierite-based ceramics. in Ceramics International
Elsevier., 42(12), 13909-13918.
https://doi.org/10.1016/j.ceramint.2016.05.201
https://hdl.handle.net/21.15107/rcub_dais_2322

Obradović N, Filipović S, Đorđević N, Kosanović D, Marković S, Pavlović VB, Olćan D, Đorđević A, Kachlik M, Maca K. Effects of mechanical activation and two-step sintering on the structure and electrical properties of cordierite-based ceramics. in Ceramics International. 2016;42(12):13909-13918.
doi:10.1016/j.ceramint.2016.05.201
https://hdl.handle.net/21.15107/rcub_dais_2322 .

Obradović, Nina, Filipović, Suzana, Đorđević, Nataša, Kosanović, Darko, Marković, Smilja, Pavlović, Vladimir B., Olćan, Dragan, Đorđević, Antonije, Kachlik, Martin, Maca, Karel, "Effects of mechanical activation and two-step sintering on the structure and electrical properties of cordierite-based ceramics" in Ceramics International, 42, no. 12 (2016):13909-13918,
https://doi.org/10.1016/j.ceramint.2016.05.201 .,
https://hdl.handle.net/21.15107/rcub_dais_2322 .

TY  - JOUR
AU  - Obradović, Nina
AU  - Đorđević, Nataša
AU  - Peleš, Adriana
AU  - Filipović, Suzana
AU  - Mitrić, Miodrag
AU  - Pavlović, Vladimir B.
PY  - 2015
UR  - https://dais.sanu.ac.rs/123456789/767
AB  - Due to its characteristics, cordierite, 2MgO·2Al2O3·5SiO2, is a high-temperature ceramic material of a great scientific interest. Mechanical activation of the starting mixtures containing 5.00 mass% TiO2 was performed in a high-energy ball mill for 10 minutes. The compaction pressure varied from 0.5 to 6tcm-2 (49-588 MPa). The sintering process was performed at 1350ºC for four hours in the air atmosphere. The phase composition of the activated and sintered samples was analyzed using X-ray diffraction. Scanning electron microscopy was used to analyze the microstructure of both compacted and sintered samples. The authors have investigated the influence of compaction pressure on the sintered samples and their electrical properties.
PB  - Belgrade : International Institute for the Science of Sintering
T2  - Science of Sintering
T1  - The influence of compaction pressure on the density and electrical properties of cordierite-based ceramics
SP  - 15
EP  - 22
VL  - 47
IS  - 1
DO  - 10.2298/SOS1501015O
UR  - https://hdl.handle.net/21.15107/rcub_dais_767
ER  - 

@article{
author = "Obradović, Nina and Đorđević, Nataša and Peleš, Adriana and Filipović, Suzana and Mitrić, Miodrag and Pavlović, Vladimir B.",
year = "2015",
abstract = "Due to its characteristics, cordierite, 2MgO·2Al2O3·5SiO2, is a high-temperature ceramic material of a great scientific interest. Mechanical activation of the starting mixtures containing 5.00 mass% TiO2 was performed in a high-energy ball mill for 10 minutes. The compaction pressure varied from 0.5 to 6tcm-2 (49-588 MPa). The sintering process was performed at 1350ºC for four hours in the air atmosphere. The phase composition of the activated and sintered samples was analyzed using X-ray diffraction. Scanning electron microscopy was used to analyze the microstructure of both compacted and sintered samples. The authors have investigated the influence of compaction pressure on the sintered samples and their electrical properties.",
publisher = "Belgrade : International Institute for the Science of Sintering",
journal = "Science of Sintering",
title = "The influence of compaction pressure on the density and electrical properties of cordierite-based ceramics",
pages = "15-22",
volume = "47",
number = "1",
doi = "10.2298/SOS1501015O",
url = "https://hdl.handle.net/21.15107/rcub_dais_767"
}

Obradović, N., Đorđević, N., Peleš, A., Filipović, S., Mitrić, M.,& Pavlović, V. B.. (2015). The influence of compaction pressure on the density and electrical properties of cordierite-based ceramics. in Science of Sintering
Belgrade : International Institute for the Science of Sintering., 47(1), 15-22.
https://doi.org/10.2298/SOS1501015O
https://hdl.handle.net/21.15107/rcub_dais_767

Obradović N, Đorđević N, Peleš A, Filipović S, Mitrić M, Pavlović VB. The influence of compaction pressure on the density and electrical properties of cordierite-based ceramics. in Science of Sintering. 2015;47(1):15-22.
doi:10.2298/SOS1501015O
https://hdl.handle.net/21.15107/rcub_dais_767 .

Obradović, Nina, Đorđević, Nataša, Peleš, Adriana, Filipović, Suzana, Mitrić, Miodrag, Pavlović, Vladimir B., "The influence of compaction pressure on the density and electrical properties of cordierite-based ceramics" in Science of Sintering, 47, no. 1 (2015):15-22,
https://doi.org/10.2298/SOS1501015O .,
https://hdl.handle.net/21.15107/rcub_dais_767 .

TY  - CONF
AU  - Obradović, Nina
AU  - Đorđević, Nataša
AU  - Marković, Smilja
AU  - Marković, Marija
AU  - Mitrić, Miodrag
PY  - 2015
UR  - https://dais.sanu.ac.rs/123456789/765
AB  - Fire protection coatings on steel constructions for outdoor conditions on the basis of organic solutions have been analyzed. The first layer of coating is corrosion protection, alkyd paint „PROTHERM STEEL PRIMEPOX“ manufactorer „ITALVIS PROTECT“ Italy. The second layer of coating is an expanding coat for outdoor conditions „PROTHERM STEEL (EXT)“ solvent-bazed, „AMONNFIRE“ Italy. The third layer is final colors for metal „AMOTHERM STEEL TOP PU SB“ „AMONNFIRE“ Italy. XRD, DTA/TG and FTIR methods were used for sample characterization. It was found that primary and outer layer had very good adhesion. The second layer, for fire protection possesses 2.5 mass % humidity, which resulted in decrease of adhesion. XRD and FTIR analysis showed that those materials are adequate materials for fire protection up to 1000°C. Principles of fire protection are based on chemical reaction that are taking place in the temperature range 400-700°C.
PB  - Belgrade : Serbian Ceramic Society
C3  - Advanced Ceramics and Application : new frontiers in multifunctional material science and processing : program and the book of abstracts : II Serbian Ceramic Society Conference, Sep 30th-Oct 1st, 2013, Belgrade
T1  - Correlation between crystal structure and thermal stability of fire protection coating
SP  - 86
EP  - 86
UR  - https://hdl.handle.net/21.15107/rcub_dais_765
ER  - 

@conference{
author = "Obradović, Nina and Đorđević, Nataša and Marković, Smilja and Marković, Marija and Mitrić, Miodrag",
year = "2015",
abstract = "Fire protection coatings on steel constructions for outdoor conditions on the basis of organic solutions have been analyzed. The first layer of coating is corrosion protection, alkyd paint „PROTHERM STEEL PRIMEPOX“ manufactorer „ITALVIS PROTECT“ Italy. The second layer of coating is an expanding coat for outdoor conditions „PROTHERM STEEL (EXT)“ solvent-bazed, „AMONNFIRE“ Italy. The third layer is final colors for metal „AMOTHERM STEEL TOP PU SB“ „AMONNFIRE“ Italy. XRD, DTA/TG and FTIR methods were used for sample characterization. It was found that primary and outer layer had very good adhesion. The second layer, for fire protection possesses 2.5 mass % humidity, which resulted in decrease of adhesion. XRD and FTIR analysis showed that those materials are adequate materials for fire protection up to 1000°C. Principles of fire protection are based on chemical reaction that are taking place in the temperature range 400-700°C.",
publisher = "Belgrade : Serbian Ceramic Society",
journal = "Advanced Ceramics and Application : new frontiers in multifunctional material science and processing : program and the book of abstracts : II Serbian Ceramic Society Conference, Sep 30th-Oct 1st, 2013, Belgrade",
title = "Correlation between crystal structure and thermal stability of fire protection coating",
pages = "86-86",
url = "https://hdl.handle.net/21.15107/rcub_dais_765"
}

Obradović, N., Đorđević, N., Marković, S., Marković, M.,& Mitrić, M.. (2015). Correlation between crystal structure and thermal stability of fire protection coating. in Advanced Ceramics and Application : new frontiers in multifunctional material science and processing : program and the book of abstracts : II Serbian Ceramic Society Conference, Sep 30th-Oct 1st, 2013, Belgrade
Belgrade : Serbian Ceramic Society., 86-86.
https://hdl.handle.net/21.15107/rcub_dais_765

Obradović N, Đorđević N, Marković S, Marković M, Mitrić M. Correlation between crystal structure and thermal stability of fire protection coating. in Advanced Ceramics and Application : new frontiers in multifunctional material science and processing : program and the book of abstracts : II Serbian Ceramic Society Conference, Sep 30th-Oct 1st, 2013, Belgrade. 2015;:86-86.
https://hdl.handle.net/21.15107/rcub_dais_765 .

Obradović, Nina, Đorđević, Nataša, Marković, Smilja, Marković, Marija, Mitrić, Miodrag, "Correlation between crystal structure and thermal stability of fire protection coating" in Advanced Ceramics and Application : new frontiers in multifunctional material science and processing : program and the book of abstracts : II Serbian Ceramic Society Conference, Sep 30th-Oct 1st, 2013, Belgrade (2015):86-86,
https://hdl.handle.net/21.15107/rcub_dais_765 .

TY  - CONF
AU  - Obradović, Nina
AU  - Đorđević, Nataša
AU  - Kosanović, Darko
AU  - Filipović, Suzana
AU  - Marković, Smilja
AU  - Mitrić, Miodrag
AU  - Pavlović, Vladimir B.
PY  - 2015
UR  - https://dais.sanu.ac.rs/123456789/761
AB  - Cordierite, 2MgO•2Ah03•5Si02 (MAS), is a very attractive high-temperature ceramic material. In order to accelerate the process of sintering, 5.00 mass% Mo03 was added to the starting mixtures. The mechanical activation of the starting mixtures was performed in a high energy ball mill in time intervals from 0 to 160 minutes. In following, starting mixtures were sintered at 1300 °C for 2h. In order to determine the changes in the particle size distribution, the mechanically treated powders were characterized by a laser light-scattering particle size analyzer. The phase composition of the starting mixtures and sintered samples was analyzed by the X-ray diffraction method. Differential thermal analyses (DTA) and thermo-gravimetric (TG) analysis were used in order to determine characteristic temperatures. Kissinger's equation was employed to calculate apparent activation energies of various processes that occur within the system while heating. Based on the obtained DTA results, it was established that mechanical activation along with MoO3 additive, has influence on sintering temperature which was decreased for about 150 °C.
PB  - Ljubljana : Central and Eastern European Committee for Thermal Analysis and Calorimetry
C3  - 3rd Central and Eastern European Conference on Thermal Analysis and Calorimetry 25-28 August 2015, Ljubljana, Slovenia: Book of Abstracts
T1  - Reaction kinetics of mechanically activated cordierite based ceramics studied via DTA
SP  - 195
EP  - 195
UR  - https://hdl.handle.net/21.15107/rcub_dais_761
ER  - 

@conference{
author = "Obradović, Nina and Đorđević, Nataša and Kosanović, Darko and Filipović, Suzana and Marković, Smilja and Mitrić, Miodrag and Pavlović, Vladimir B.",
year = "2015",
abstract = "Cordierite, 2MgO•2Ah03•5Si02 (MAS), is a very attractive high-temperature ceramic material. In order to accelerate the process of sintering, 5.00 mass% Mo03 was added to the starting mixtures. The mechanical activation of the starting mixtures was performed in a high energy ball mill in time intervals from 0 to 160 minutes. In following, starting mixtures were sintered at 1300 °C for 2h. In order to determine the changes in the particle size distribution, the mechanically treated powders were characterized by a laser light-scattering particle size analyzer. The phase composition of the starting mixtures and sintered samples was analyzed by the X-ray diffraction method. Differential thermal analyses (DTA) and thermo-gravimetric (TG) analysis were used in order to determine characteristic temperatures. Kissinger's equation was employed to calculate apparent activation energies of various processes that occur within the system while heating. Based on the obtained DTA results, it was established that mechanical activation along with MoO3 additive, has influence on sintering temperature which was decreased for about 150 °C.",
publisher = "Ljubljana : Central and Eastern European Committee for Thermal Analysis and Calorimetry",
journal = "3rd Central and Eastern European Conference on Thermal Analysis and Calorimetry 25-28 August 2015, Ljubljana, Slovenia: Book of Abstracts",
title = "Reaction kinetics of mechanically activated cordierite based ceramics studied via DTA",
pages = "195-195",
url = "https://hdl.handle.net/21.15107/rcub_dais_761"
}

Obradović, N., Đorđević, N., Kosanović, D., Filipović, S., Marković, S., Mitrić, M.,& Pavlović, V. B.. (2015). Reaction kinetics of mechanically activated cordierite based ceramics studied via DTA. in 3rd Central and Eastern European Conference on Thermal Analysis and Calorimetry 25-28 August 2015, Ljubljana, Slovenia: Book of Abstracts
Ljubljana : Central and Eastern European Committee for Thermal Analysis and Calorimetry., 195-195.
https://hdl.handle.net/21.15107/rcub_dais_761

Obradović N, Đorđević N, Kosanović D, Filipović S, Marković S, Mitrić M, Pavlović VB. Reaction kinetics of mechanically activated cordierite based ceramics studied via DTA. in 3rd Central and Eastern European Conference on Thermal Analysis and Calorimetry 25-28 August 2015, Ljubljana, Slovenia: Book of Abstracts. 2015;:195-195.
https://hdl.handle.net/21.15107/rcub_dais_761 .

Obradović, Nina, Đorđević, Nataša, Kosanović, Darko, Filipović, Suzana, Marković, Smilja, Mitrić, Miodrag, Pavlović, Vladimir B., "Reaction kinetics of mechanically activated cordierite based ceramics studied via DTA" in 3rd Central and Eastern European Conference on Thermal Analysis and Calorimetry 25-28 August 2015, Ljubljana, Slovenia: Book of Abstracts (2015):195-195,
https://hdl.handle.net/21.15107/rcub_dais_761 .

TY  - JOUR
AU  - Đorđević, Nataša
AU  - Obradović, Nina
AU  - Kosanović, Darko
AU  - Mitrić, Miodrag
AU  - Pavlović, Vladimr P.
PY  - 2014
UR  - https://dais.sanu.ac.rs/123456789/737
AB  - Cordierite (MAS) is difficult to sinter because of the very narrow sintering temperature range (1300-1400ºC). Because a low temperature process is desirable, it is necessary to find functional ads which can allow easier sintering process at lower temperature. The influence of MoO3 on the preparation process of cordierite ceramics was investigated. 2MgO-2Al2O3-5SiO2 was researched by sintering followed binary systems: MgO/MoO3, Al2O3/MoO3 and SiO2/MoO3 (all sintered at 850ºC and 1100ºC, sintering time 2h). Composition of these systems was 80 mass% of oxide and 20 mass% MoO3. The effects of sintering, the composition and morphology were followed by X-ray diffraction and SEM microscopy. It has been found that MoO3, beside liquid phase, forms intermediary unstable compounds with MgO and Al2O3, which is the significance information for further research. MAS ceramics were sintered with 20 mass% MoO3 at 1100ºC, 1200ºC and 1300ºC, during 2h. © 2014 Science of Sintering.
PB  - Belgrade : International Institute for the Science of Sintering
T2  - Science of Sintering
T1  - Sintering of cordierite in the presence of MoO3 and crystallization analysis
SP  - 307
EP  - 313
VL  - 46
IS  - 3
DO  - 10.2298/SOS1403307D
UR  - https://hdl.handle.net/21.15107/rcub_dais_737
ER  - 

@article{
author = "Đorđević, Nataša and Obradović, Nina and Kosanović, Darko and Mitrić, Miodrag and Pavlović, Vladimr P.",
year = "2014",
abstract = "Cordierite (MAS) is difficult to sinter because of the very narrow sintering temperature range (1300-1400ºC). Because a low temperature process is desirable, it is necessary to find functional ads which can allow easier sintering process at lower temperature. The influence of MoO3 on the preparation process of cordierite ceramics was investigated. 2MgO-2Al2O3-5SiO2 was researched by sintering followed binary systems: MgO/MoO3, Al2O3/MoO3 and SiO2/MoO3 (all sintered at 850ºC and 1100ºC, sintering time 2h). Composition of these systems was 80 mass% of oxide and 20 mass% MoO3. The effects of sintering, the composition and morphology were followed by X-ray diffraction and SEM microscopy. It has been found that MoO3, beside liquid phase, forms intermediary unstable compounds with MgO and Al2O3, which is the significance information for further research. MAS ceramics were sintered with 20 mass% MoO3 at 1100ºC, 1200ºC and 1300ºC, during 2h. © 2014 Science of Sintering.",
publisher = "Belgrade : International Institute for the Science of Sintering",
journal = "Science of Sintering",
title = "Sintering of cordierite in the presence of MoO3 and crystallization analysis",
pages = "307-313",
volume = "46",
number = "3",
doi = "10.2298/SOS1403307D",
url = "https://hdl.handle.net/21.15107/rcub_dais_737"
}

Đorđević, N., Obradović, N., Kosanović, D., Mitrić, M.,& Pavlović, V. P.. (2014). Sintering of cordierite in the presence of MoO3 and crystallization analysis. in Science of Sintering
Belgrade : International Institute for the Science of Sintering., 46(3), 307-313.
https://doi.org/10.2298/SOS1403307D
https://hdl.handle.net/21.15107/rcub_dais_737

Đorđević N, Obradović N, Kosanović D, Mitrić M, Pavlović VP. Sintering of cordierite in the presence of MoO3 and crystallization analysis. in Science of Sintering. 2014;46(3):307-313.
doi:10.2298/SOS1403307D
https://hdl.handle.net/21.15107/rcub_dais_737 .

Đorđević, Nataša, Obradović, Nina, Kosanović, Darko, Mitrić, Miodrag, Pavlović, Vladimr P., "Sintering of cordierite in the presence of MoO3 and crystallization analysis" in Science of Sintering, 46, no. 3 (2014):307-313,
https://doi.org/10.2298/SOS1403307D .,
https://hdl.handle.net/21.15107/rcub_dais_737 .

TY  - CONF
AU  - Đorđević, Nataša
AU  - Obradović, Nina
AU  - Kosanović, Darko
AU  - Mitrić, Miodrag
AU  - Pavlović, Vladimir B.
PY  - 2014
UR  - https://dais.sanu.ac.rs/123456789/766
AB  - Cordierite (MAS) is difficult to sinter because of the very narrow sintering temperature range (1300-1400ºC). Because a low temperature process is desirable, it is necessary to find functional ads which can allow easier sintering process at lower temperature. The influence of MoO3 on the preparation process of cordierite ceramics was investigated. 2MgO-2Al2O3-5SiO2 was researched by sintering followed binary systems: MgO/MoO3, Al2O3/MoO3 and SiO2/MoO3 (all sintered at 850ºC and 1100ºC, sintering time 2h). Composition of these systems was 80% of oxide and 20% MoO3. The effects of sintering, the composition and morphology were followed by X-ray diffraction, SEM microscopy and EDS analysis. It has been found that MoO3, beside liquid phase, forms intermediary unstable compounds with MgO and Al2O3, which is the significance information for further research. MAS ceramics were sintered with 20% MoO3 at 1100ºC, 1200ºC and 1300ºC, during 2h.
PB  - Belgrade : Materials Research Society of Serbia
C3  - The Sixteenth Annual Conference YUCOMAT 2014: Programme and the Book of Abstracts
T1  - Sintering of cordierite in the presence of MoO3 and crystallization analysis
SP  - 68
EP  - 68
UR  - https://hdl.handle.net/21.15107/rcub_dais_766
ER  - 

@conference{
author = "Đorđević, Nataša and Obradović, Nina and Kosanović, Darko and Mitrić, Miodrag and Pavlović, Vladimir B.",
year = "2014",
abstract = "Cordierite (MAS) is difficult to sinter because of the very narrow sintering temperature range (1300-1400ºC). Because a low temperature process is desirable, it is necessary to find functional ads which can allow easier sintering process at lower temperature. The influence of MoO3 on the preparation process of cordierite ceramics was investigated. 2MgO-2Al2O3-5SiO2 was researched by sintering followed binary systems: MgO/MoO3, Al2O3/MoO3 and SiO2/MoO3 (all sintered at 850ºC and 1100ºC, sintering time 2h). Composition of these systems was 80% of oxide and 20% MoO3. The effects of sintering, the composition and morphology were followed by X-ray diffraction, SEM microscopy and EDS analysis. It has been found that MoO3, beside liquid phase, forms intermediary unstable compounds with MgO and Al2O3, which is the significance information for further research. MAS ceramics were sintered with 20% MoO3 at 1100ºC, 1200ºC and 1300ºC, during 2h.",
publisher = "Belgrade : Materials Research Society of Serbia",
journal = "The Sixteenth Annual Conference YUCOMAT 2014: Programme and the Book of Abstracts",
title = "Sintering of cordierite in the presence of MoO3 and crystallization analysis",
pages = "68-68",
url = "https://hdl.handle.net/21.15107/rcub_dais_766"
}

Đorđević, N., Obradović, N., Kosanović, D., Mitrić, M.,& Pavlović, V. B.. (2014). Sintering of cordierite in the presence of MoO3 and crystallization analysis. in The Sixteenth Annual Conference YUCOMAT 2014: Programme and the Book of Abstracts
Belgrade : Materials Research Society of Serbia., 68-68.
https://hdl.handle.net/21.15107/rcub_dais_766

Đorđević N, Obradović N, Kosanović D, Mitrić M, Pavlović VB. Sintering of cordierite in the presence of MoO3 and crystallization analysis. in The Sixteenth Annual Conference YUCOMAT 2014: Programme and the Book of Abstracts. 2014;:68-68.
https://hdl.handle.net/21.15107/rcub_dais_766 .

Đorđević, Nataša, Obradović, Nina, Kosanović, Darko, Mitrić, Miodrag, Pavlović, Vladimir B., "Sintering of cordierite in the presence of MoO3 and crystallization analysis" in The Sixteenth Annual Conference YUCOMAT 2014: Programme and the Book of Abstracts (2014):68-68,
https://hdl.handle.net/21.15107/rcub_dais_766 .

TY  - CONF
AU  - Đorđević, Nataša
AU  - Obradović, Nina
AU  - Kosanović, Darko
AU  - Marković, Smilja
AU  - Mitrić, Miodrag
PY  - 2014
UR  - https://dais.sanu.ac.rs/123456789/613
AB  - Cordierite, 2MgO•2Al2O3•5SiO2 (MAS), is high-temperature ceramic material. Cordierite is commonly used material because of outstanding electrical properties, low temperature expansion coefficient and low dielectric constant. In order to accelerate the process of sintering, 5.00 mass% MoO3 has been added to the starting mixtures. The mechanical activation of the starting mixtures was performed in a high energy ball mill during 0-160 minutes. All starting mixtures were sintered at 1100°C, 1200°C and 1300°C for 2h. The particle size analysis (PSA) was employed in order to determine the changes in the particle size of the mechanically treated powders. The phase composition of the starting powders was analyzed by the X-ray diffraction method. Differential thermal (DTA) and thermogravimetric (TG) analysis were used in order to determine characteristic temperatures within the system during heating. Based on the obtained DTA results, it was established that mechanical activation with additive MoO3, has influence on decreasing sintering temperatures for about 150°C.
PB  - Belgrade : Serbian Ceramic Society
C3  - Advanced Ceramics and Application : new frontiers in multifunctional material science and processing : program and the book of abstracts / III Serbian Ceramic Society Conference, 29th September - 1st October, Belgrade, 2014
T1  - Influence of Mechanical Activation on the Constituents of the MgO-Al2O3-SiO2-MoO3 System
SP  - 119
EP  - 119
UR  - https://hdl.handle.net/21.15107/rcub_dais_613
ER  - 

@conference{
author = "Đorđević, Nataša and Obradović, Nina and Kosanović, Darko and Marković, Smilja and Mitrić, Miodrag",
year = "2014",
abstract = "Cordierite, 2MgO•2Al2O3•5SiO2 (MAS), is high-temperature ceramic material. Cordierite is commonly used material because of outstanding electrical properties, low temperature expansion coefficient and low dielectric constant. In order to accelerate the process of sintering, 5.00 mass% MoO3 has been added to the starting mixtures. The mechanical activation of the starting mixtures was performed in a high energy ball mill during 0-160 minutes. All starting mixtures were sintered at 1100°C, 1200°C and 1300°C for 2h. The particle size analysis (PSA) was employed in order to determine the changes in the particle size of the mechanically treated powders. The phase composition of the starting powders was analyzed by the X-ray diffraction method. Differential thermal (DTA) and thermogravimetric (TG) analysis were used in order to determine characteristic temperatures within the system during heating. Based on the obtained DTA results, it was established that mechanical activation with additive MoO3, has influence on decreasing sintering temperatures for about 150°C.",
publisher = "Belgrade : Serbian Ceramic Society",
journal = "Advanced Ceramics and Application : new frontiers in multifunctional material science and processing : program and the book of abstracts / III Serbian Ceramic Society Conference, 29th September - 1st October, Belgrade, 2014",
title = "Influence of Mechanical Activation on the Constituents of the MgO-Al2O3-SiO2-MoO3 System",
pages = "119-119",
url = "https://hdl.handle.net/21.15107/rcub_dais_613"
}

Đorđević, N., Obradović, N., Kosanović, D., Marković, S.,& Mitrić, M.. (2014). Influence of Mechanical Activation on the Constituents of the MgO-Al2O3-SiO2-MoO3 System. in Advanced Ceramics and Application : new frontiers in multifunctional material science and processing : program and the book of abstracts / III Serbian Ceramic Society Conference, 29th September - 1st October, Belgrade, 2014
Belgrade : Serbian Ceramic Society., 119-119.
https://hdl.handle.net/21.15107/rcub_dais_613

Đorđević N, Obradović N, Kosanović D, Marković S, Mitrić M. Influence of Mechanical Activation on the Constituents of the MgO-Al2O3-SiO2-MoO3 System. in Advanced Ceramics and Application : new frontiers in multifunctional material science and processing : program and the book of abstracts / III Serbian Ceramic Society Conference, 29th September - 1st October, Belgrade, 2014. 2014;:119-119.
https://hdl.handle.net/21.15107/rcub_dais_613 .

Đorđević, Nataša, Obradović, Nina, Kosanović, Darko, Marković, Smilja, Mitrić, Miodrag, "Influence of Mechanical Activation on the Constituents of the MgO-Al2O3-SiO2-MoO3 System" in Advanced Ceramics and Application : new frontiers in multifunctional material science and processing : program and the book of abstracts / III Serbian Ceramic Society Conference, 29th September - 1st October, Belgrade, 2014 (2014):119-119,
https://hdl.handle.net/21.15107/rcub_dais_613 .

TY  - JOUR
AU  - Peleš, Adriana
AU  - Đorđević, Nataša
AU  - Obradović, Nina
AU  - Tadić, Nenad B.
AU  - Pavlović, Vladimir B.
PY  - 2013
UR  - https://dais.sanu.ac.rs/123456789/188
AB  - Mechanical activation is a commonly used and relatively fast and inexpensive procedure for sample preparation before the sintering process. Cordierite, a stoichiometric mixture of three different oxides (2MgO⋅2Al2O3⋅5SiO2) is a very attractive, widely used high-temperature ceramic material. The mechanical activation of the starting mixtures with 5.00 mass% TiO2 was performed in a high energy ball mill during 10-80 min. The applied compaction pressure before the sintering process was 2t/cm2, based on our recent investigation. The sintering process was performed at 1350oC for 2h and 4h in air atmosphere. X-ray diffraction was used to analyze the phase composition of non-activated and 80 min activated samples, sintered for 2 and 4h, respectively. Scanning electron microscopy was performed to analyze the microstructure of both compacted and sintered samples. Atomic force microscope was used to investigate the surface of the sintered samples. This paper investigates the influence of prolonged sintering time on the densities of the sintered samples, along with electrical properties. [Projekat Ministarstva nauke Republike Srbije, br. OI 172057]
PB  - Belgrade : International Institute for the Science of Sintering
T2  - Science of Sintering
T1  - Influence of prolonged sintering time on density and electrical properties of isothermally sintered cordierite-based ceramics
SP  - 157
EP  - 164
VL  - 45
IS  - 2
DO  - 10.2298/SOS1302157P
UR  - https://hdl.handle.net/21.15107/rcub_dais_188
ER  - 

@article{
author = "Peleš, Adriana and Đorđević, Nataša and Obradović, Nina and Tadić, Nenad B. and Pavlović, Vladimir B.",
year = "2013",
abstract = "Mechanical activation is a commonly used and relatively fast and inexpensive procedure for sample preparation before the sintering process. Cordierite, a stoichiometric mixture of three different oxides (2MgO⋅2Al2O3⋅5SiO2) is a very attractive, widely used high-temperature ceramic material. The mechanical activation of the starting mixtures with 5.00 mass% TiO2 was performed in a high energy ball mill during 10-80 min. The applied compaction pressure before the sintering process was 2t/cm2, based on our recent investigation. The sintering process was performed at 1350oC for 2h and 4h in air atmosphere. X-ray diffraction was used to analyze the phase composition of non-activated and 80 min activated samples, sintered for 2 and 4h, respectively. Scanning electron microscopy was performed to analyze the microstructure of both compacted and sintered samples. Atomic force microscope was used to investigate the surface of the sintered samples. This paper investigates the influence of prolonged sintering time on the densities of the sintered samples, along with electrical properties. [Projekat Ministarstva nauke Republike Srbije, br. OI 172057]",
publisher = "Belgrade : International Institute for the Science of Sintering",
journal = "Science of Sintering",
title = "Influence of prolonged sintering time on density and electrical properties of isothermally sintered cordierite-based ceramics",
pages = "157-164",
volume = "45",
number = "2",
doi = "10.2298/SOS1302157P",
url = "https://hdl.handle.net/21.15107/rcub_dais_188"
}

Peleš, A., Đorđević, N., Obradović, N., Tadić, N. B.,& Pavlović, V. B.. (2013). Influence of prolonged sintering time on density and electrical properties of isothermally sintered cordierite-based ceramics. in Science of Sintering
Belgrade : International Institute for the Science of Sintering., 45(2), 157-164.
https://doi.org/10.2298/SOS1302157P
https://hdl.handle.net/21.15107/rcub_dais_188

Peleš A, Đorđević N, Obradović N, Tadić NB, Pavlović VB. Influence of prolonged sintering time on density and electrical properties of isothermally sintered cordierite-based ceramics. in Science of Sintering. 2013;45(2):157-164.
doi:10.2298/SOS1302157P
https://hdl.handle.net/21.15107/rcub_dais_188 .

Peleš, Adriana, Đorđević, Nataša, Obradović, Nina, Tadić, Nenad B., Pavlović, Vladimir B., "Influence of prolonged sintering time on density and electrical properties of isothermally sintered cordierite-based ceramics" in Science of Sintering, 45, no. 2 (2013):157-164,
https://doi.org/10.2298/SOS1302157P .,
https://hdl.handle.net/21.15107/rcub_dais_188 .

TY  - CONF
AU  - Đorđević, Nataša
AU  - Mihajlović, A.
AU  - Peleš, Adriana
AU  - Obradović, Nina
AU  - Pavlović, Vladimir B.
PY  - 2013
UR  - https://dais.sanu.ac.rs/123456789/389
AB  - The influence of MoO3 on the process of cordierite ceramics preparation, 2MgO-2Al2O3-5SiO2 (MAS) was researched by sintering followed binary systems: MgO/MoO3 (sintered at 850 ºC and 1000 ºC), Al2O3/Bi2O3 and SiO2/Bi2O3 (sintered at 850 ºC and 1000 ºC). Composition of these systems was 80 % of oxide and 20 % MoO3. The effects of sintering, the composition and morphology were followed by x-ray diffraction, scanning electron microscopy and EDS analysis. It has been found that MoO3, beside liquid phase, forms intermediary unstable compounds with MgO and Al2O3. The following research is planned to investigate the effect of 5 % mass of MoO3 on the electrical properties of cordierite ceramics.
PB  - Belgrade : Materials Research Society of Serbia
C3  - The Fifteenth Annual Conference YUCOMAT 2013: Programme and the Book of Abstracts
T1  - Influence of MoO3 on cordierite ceramics sintering and crystallization
SP  - 103
EP  - 103
UR  - https://hdl.handle.net/21.15107/rcub_dais_389
ER  - 

@conference{
author = "Đorđević, Nataša and Mihajlović, A. and Peleš, Adriana and Obradović, Nina and Pavlović, Vladimir B.",
year = "2013",
abstract = "The influence of MoO3 on the process of cordierite ceramics preparation, 2MgO-2Al2O3-5SiO2 (MAS) was researched by sintering followed binary systems: MgO/MoO3 (sintered at 850 ºC and 1000 ºC), Al2O3/Bi2O3 and SiO2/Bi2O3 (sintered at 850 ºC and 1000 ºC). Composition of these systems was 80 % of oxide and 20 % MoO3. The effects of sintering, the composition and morphology were followed by x-ray diffraction, scanning electron microscopy and EDS analysis. It has been found that MoO3, beside liquid phase, forms intermediary unstable compounds with MgO and Al2O3. The following research is planned to investigate the effect of 5 % mass of MoO3 on the electrical properties of cordierite ceramics.",
publisher = "Belgrade : Materials Research Society of Serbia",
journal = "The Fifteenth Annual Conference YUCOMAT 2013: Programme and the Book of Abstracts",
title = "Influence of MoO3 on cordierite ceramics sintering and crystallization",
pages = "103-103",
url = "https://hdl.handle.net/21.15107/rcub_dais_389"
}

Đorđević, N., Mihajlović, A., Peleš, A., Obradović, N.,& Pavlović, V. B.. (2013). Influence of MoO3 on cordierite ceramics sintering and crystallization. in The Fifteenth Annual Conference YUCOMAT 2013: Programme and the Book of Abstracts
Belgrade : Materials Research Society of Serbia., 103-103.
https://hdl.handle.net/21.15107/rcub_dais_389

Đorđević N, Mihajlović A, Peleš A, Obradović N, Pavlović VB. Influence of MoO3 on cordierite ceramics sintering and crystallization. in The Fifteenth Annual Conference YUCOMAT 2013: Programme and the Book of Abstracts. 2013;:103-103.
https://hdl.handle.net/21.15107/rcub_dais_389 .

Đorđević, Nataša, Mihajlović, A., Peleš, Adriana, Obradović, Nina, Pavlović, Vladimir B., "Influence of MoO3 on cordierite ceramics sintering and crystallization" in The Fifteenth Annual Conference YUCOMAT 2013: Programme and the Book of Abstracts (2013):103-103,
https://hdl.handle.net/21.15107/rcub_dais_389 .

TY  - CONF
AU  - Obradović, Nina
AU  - Peleš, Adriana
AU  - Đorđević, Nataša
AU  - Marković, Smilja
AU  - Mitrić, Miodrag
AU  - Pavlović, Vladimir B.
PY  - 2013
UR  - https://dais.sanu.ac.rs/123456789/402
AB  - According to its low temperature thermal expansion coefficient, low dielectric constant, also good mechanical properties, cordierite, 2MgO×2Al2O3×5SiO2, represents a very attractive hightemperature ceramic material. In this study, cordierite was prepared by solid state reaction of the MgO, Al2O3 and SiO2 mixture. One of the components from the mixture, SiO2, was mechanically activated in a high energy ball mill during 5 and 10 minutes. The applied pressure before the sintering process was 2 t/cm2. Sintering process of mixtures containing non-activated and activated SiO2 powder was performed at 1350 oC for 4h in the air atmosphere. The phase composition of starting oxides and sintered samples was analyzed by the X-ray diffraction method. Particle size analysis was performed to investigate the differences between starting components. Scanning electron microscopy was done to analyze the microstructure of both components and sintered samples. This paper investigates the influence of one mechanically activated SiO2 component on the densities of green bodies as well as on the sintered samples, along with electrical properties of cordierite ceramics.
PB  - Belgrade : Materials Research Society of Serbia
C3  - The Fifteenth Annual Conference YUCOMAT 2013: Programme and the Book of Abstracts
T1  - Influence of one activated component on the sintering process of three phase system
SP  - 103
EP  - 103
UR  - https://hdl.handle.net/21.15107/rcub_dais_402
ER  - 

@conference{
author = "Obradović, Nina and Peleš, Adriana and Đorđević, Nataša and Marković, Smilja and Mitrić, Miodrag and Pavlović, Vladimir B.",
year = "2013",
abstract = "According to its low temperature thermal expansion coefficient, low dielectric constant, also good mechanical properties, cordierite, 2MgO×2Al2O3×5SiO2, represents a very attractive hightemperature ceramic material. In this study, cordierite was prepared by solid state reaction of the MgO, Al2O3 and SiO2 mixture. One of the components from the mixture, SiO2, was mechanically activated in a high energy ball mill during 5 and 10 minutes. The applied pressure before the sintering process was 2 t/cm2. Sintering process of mixtures containing non-activated and activated SiO2 powder was performed at 1350 oC for 4h in the air atmosphere. The phase composition of starting oxides and sintered samples was analyzed by the X-ray diffraction method. Particle size analysis was performed to investigate the differences between starting components. Scanning electron microscopy was done to analyze the microstructure of both components and sintered samples. This paper investigates the influence of one mechanically activated SiO2 component on the densities of green bodies as well as on the sintered samples, along with electrical properties of cordierite ceramics.",
publisher = "Belgrade : Materials Research Society of Serbia",
journal = "The Fifteenth Annual Conference YUCOMAT 2013: Programme and the Book of Abstracts",
title = "Influence of one activated component on the sintering process of three phase system",
pages = "103-103",
url = "https://hdl.handle.net/21.15107/rcub_dais_402"
}

Obradović, N., Peleš, A., Đorđević, N., Marković, S., Mitrić, M.,& Pavlović, V. B.. (2013). Influence of one activated component on the sintering process of three phase system. in The Fifteenth Annual Conference YUCOMAT 2013: Programme and the Book of Abstracts
Belgrade : Materials Research Society of Serbia., 103-103.
https://hdl.handle.net/21.15107/rcub_dais_402

Obradović N, Peleš A, Đorđević N, Marković S, Mitrić M, Pavlović VB. Influence of one activated component on the sintering process of three phase system. in The Fifteenth Annual Conference YUCOMAT 2013: Programme and the Book of Abstracts. 2013;:103-103.
https://hdl.handle.net/21.15107/rcub_dais_402 .

Obradović, Nina, Peleš, Adriana, Đorđević, Nataša, Marković, Smilja, Mitrić, Miodrag, Pavlović, Vladimir B., "Influence of one activated component on the sintering process of three phase system" in The Fifteenth Annual Conference YUCOMAT 2013: Programme and the Book of Abstracts (2013):103-103,
https://hdl.handle.net/21.15107/rcub_dais_402 .