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Serbian Academy of Sciences and Arts, Project F-198

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Serbian Academy of Sciences and Arts, Project F-198

Authors

Publications

Effect of chemical composition on microstructural properties and sintering kinetics of (Ba,Sr)TiO3 powders

Kosanović, Darko; Blagojević, Vladimir A.; Labus, Nebojša; Tadić, Nenad B.; Pavlović, Vladimir B.; Ristić, Momčilo M.

(Belgrade : ETRAN, 2018)

TY  - JOUR
AU  - Kosanović, Darko
AU  - Blagojević, Vladimir A.
AU  - Labus, Nebojša
AU  - Tadić, Nenad B.
AU  - Pavlović, Vladimir B.
AU  - Ristić, Momčilo M.
PY  - 2018
UR  - http://dais.sanu.ac.rs/123456789/4080
AB  - Barium strontium titanate powders with different Ba:Sr ratios were investigated to determine the influence of the initial composition of powder mixture on microstructural properties and sintering kinetics. It was determined that BaCO3 and SrCO3 react differently to mixing, resulting in Ba0.5Sr0.5CO3 in the sample with 80% Ba and different contents of Ba1-xSrxTiO3 in samples with 50% and 20% Ba. In addition, the morphology is also different, with higher Sr content leading to larger particles size and less agglomeration. The different chemical content of the initial powder mixture also has a marked impact on the sintering process: the onset of sintering shifts towards higher temperature with higher Sr content, while the average apparent activation energy of sintering is the highest for the sample with 80% Ba and the lowest for the mixture with 50% Ba. In addition, hexagonal-to-cubic phase transformation was observed in parallel with the sintering process, where the position of the phase transition shifts to lower temperatures with an increase in Sr content. This is consistent with the behavior of low-temperature phase transitions of BST. The phase transition was not observed in sintered samples, suggesting that there is a size-dependence of the phase transition temperature. © 2016 Authors.
PB  - Belgrade : ETRAN
T2  - Science of Sintering
T1  - Effect of chemical composition on microstructural properties and sintering kinetics of (Ba,Sr)TiO3 powders
SP  - 29
EP  - 38
VL  - 50
IS  - 1
DO  - 10.2298/SOS1801029K
ER  - 
@article{
author = "Kosanović, Darko and Blagojević, Vladimir A. and Labus, Nebojša and Tadić, Nenad B. and Pavlović, Vladimir B. and Ristić, Momčilo M.",
year = "2018",
url = "http://dais.sanu.ac.rs/123456789/4080",
abstract = "Barium strontium titanate powders with different Ba:Sr ratios were investigated to determine the influence of the initial composition of powder mixture on microstructural properties and sintering kinetics. It was determined that BaCO3 and SrCO3 react differently to mixing, resulting in Ba0.5Sr0.5CO3 in the sample with 80% Ba and different contents of Ba1-xSrxTiO3 in samples with 50% and 20% Ba. In addition, the morphology is also different, with higher Sr content leading to larger particles size and less agglomeration. The different chemical content of the initial powder mixture also has a marked impact on the sintering process: the onset of sintering shifts towards higher temperature with higher Sr content, while the average apparent activation energy of sintering is the highest for the sample with 80% Ba and the lowest for the mixture with 50% Ba. In addition, hexagonal-to-cubic phase transformation was observed in parallel with the sintering process, where the position of the phase transition shifts to lower temperatures with an increase in Sr content. This is consistent with the behavior of low-temperature phase transitions of BST. The phase transition was not observed in sintered samples, suggesting that there is a size-dependence of the phase transition temperature. © 2016 Authors.",
publisher = "Belgrade : ETRAN",
journal = "Science of Sintering",
title = "Effect of chemical composition on microstructural properties and sintering kinetics of (Ba,Sr)TiO3 powders",
pages = "29-38",
volume = "50",
number = "1",
doi = "10.2298/SOS1801029K"
}
Kosanović, D., Blagojević, V. A., Labus, N., Tadić, N. B., Pavlović, V. B.,& Ristić, M. M. (2018). Effect of chemical composition on microstructural properties and sintering kinetics of (Ba,Sr)TiO3 powders.
Science of SinteringBelgrade : ETRAN., 50(1), 29-38. 
https://doi.org/10.2298/SOS1801029K
Kosanović D, Blagojević VA, Labus N, Tadić NB, Pavlović VB, Ristić MM. Effect of chemical composition on microstructural properties and sintering kinetics of (Ba,Sr)TiO3 powders. Science of Sintering. 2018;50(1):29-38
1
7
7

The influence of mechanical activation on the morphological changes of Fe/BaTiO3 powder

Kosanović, Darko; Obradović, Nina; Pavlović, Vera P.; Marković, Smilja; Maričić, Aleksa; Rasić, G.; Vlahović, Branislav; Pavlović, Vladimir B.; Ristić, Momčilo M.

(Elsevier, 2016)

TY  - JOUR
AU  - Kosanović, Darko
AU  - Obradović, Nina
AU  - Pavlović, Vera P.
AU  - Marković, Smilja
AU  - Maričić, Aleksa
AU  - Rasić, G.
AU  - Vlahović, Branislav
AU  - Pavlović, Vladimir B.
AU  - Ristić, Momčilo M.
PY  - 2016
UR  - http://dais.sanu.ac.rs/123456789/2311
AB  - Crystal structure and morphology of mechanically activated nanocrystalline Fe/BaTiO3 was investigated using a combination of spectroscopic and microscopic methods. These show that mechanical activation led to the creation of new surfaces and the comminution of the initial powder particles. Prolonged milling resulted in formation of larger agglomerates of BaTiO3 and bimodal particle size distribution, where BaTiO3 particles were significantly larger than those of iron-containing phases. Milling times of 210 min and above lead to a significant decrease in temperature of the oxidation of iron in the sample, indicating abrupt change in reactivity. Raman spectroscopy analysis has revealed that activation had a pronounced influence on Fe/BaTiO3 lattice, thereby affecting both the stability of the crystal structure and the phase transition phenomena.
PB  - Elsevier
T2  - Materials Science and Engineering: B
T1  - The influence of mechanical activation on the morphological changes of Fe/BaTiO3 powder
SP  - 89
EP  - 95
VL  - 212
DO  - 10.1016/j.mseb.2016.07.016
ER  - 
@article{
author = "Kosanović, Darko and Obradović, Nina and Pavlović, Vera P. and Marković, Smilja and Maričić, Aleksa and Rasić, G. and Vlahović, Branislav and Pavlović, Vladimir B. and Ristić, Momčilo M.",
year = "2016",
url = "http://dais.sanu.ac.rs/123456789/2311",
abstract = "Crystal structure and morphology of mechanically activated nanocrystalline Fe/BaTiO3 was investigated using a combination of spectroscopic and microscopic methods. These show that mechanical activation led to the creation of new surfaces and the comminution of the initial powder particles. Prolonged milling resulted in formation of larger agglomerates of BaTiO3 and bimodal particle size distribution, where BaTiO3 particles were significantly larger than those of iron-containing phases. Milling times of 210 min and above lead to a significant decrease in temperature of the oxidation of iron in the sample, indicating abrupt change in reactivity. Raman spectroscopy analysis has revealed that activation had a pronounced influence on Fe/BaTiO3 lattice, thereby affecting both the stability of the crystal structure and the phase transition phenomena.",
publisher = "Elsevier",
journal = "Materials Science and Engineering: B",
title = "The influence of mechanical activation on the morphological changes of Fe/BaTiO3 powder",
pages = "89-95",
volume = "212",
doi = "10.1016/j.mseb.2016.07.016"
}
Kosanović, D., Obradović, N., Pavlović, V. P., Marković, S., Maričić, A., Rasić, G., Vlahović, B., Pavlović, V. B.,& Ristić, M. M. (2016). The influence of mechanical activation on the morphological changes of Fe/BaTiO3 powder.
Materials Science and Engineering: BElsevier., 212, 89-95. 
https://doi.org/10.1016/j.mseb.2016.07.016
Kosanović D, Obradović N, Pavlović VP, Marković S, Maričić A, Rasić G, Vlahović B, Pavlović VB, Ristić MM. The influence of mechanical activation on the morphological changes of Fe/BaTiO3 powder. Materials Science and Engineering: B. 2016;212:89-95
1
1
1

Structural investigation of mechanically activated ZnO powder

Peleš, Adriana; Pavlović, Vera P.; Filipović, Suzana; Obradović, Nina; Mančić, Lidija; Krstić, Jugoslav; Mitrić, Miodrag; Vlahović, Branislav; Rašić, Goran; Kosanović, Darko; Pavlović, Vladimir B.

(Elsevier, 2015)

TY  - JOUR
AU  - Peleš, Adriana
AU  - Pavlović, Vera P.
AU  - Filipović, Suzana
AU  - Obradović, Nina
AU  - Mančić, Lidija
AU  - Krstić, Jugoslav
AU  - Mitrić, Miodrag
AU  - Vlahović, Branislav
AU  - Rašić, Goran
AU  - Kosanović, Darko
AU  - Pavlović, Vladimir B.
PY  - 2015
UR  - http://dais.sanu.ac.rs/123456789/3521
AB  - Abstract Commercially available ZnO powder was mechanically activated in a planetary ball mill. In order to investigate the specific surface area, pore volume and microstructure of non-activated and mechanically activated ZnO powders the authors performed N2 physisorption, SEM and TEM. Crystallite size and lattice microstrain were analyzed by X-ray diffraction method. XRD patterns indicate that peak intensities are getting lower and expend with activation time. The reduction in crystallite size and increasing of lattice microstrain with prolonged milling time were determined applying the Rietveld's method. The difference between non-activated and the activated powder has been also observed by X-ray photoelectron spectroscopy (XPS). XPS is used for investigating the chemical bonding of ZnO powder by analyzing the energy of photoelectrons. The lattice vibration spectra were obtained using Raman spectroscopy. In Raman spectra some changes along with atypical resonant scattering were noticed, which were caused by mechanical activation. © 2015 Published by Elsevier B.V.
PB  - Elsevier
T2  - Journal of Alloys and Compounds
T1  - Structural investigation of mechanically activated ZnO powder
SP  - 971
EP  - 979
VL  - 648
DO  - 10.1016/j.jallcom.2015.06.247
ER  - 
@article{
author = "Peleš, Adriana and Pavlović, Vera P. and Filipović, Suzana and Obradović, Nina and Mančić, Lidija and Krstić, Jugoslav and Mitrić, Miodrag and Vlahović, Branislav and Rašić, Goran and Kosanović, Darko and Pavlović, Vladimir B.",
year = "2015",
url = "http://dais.sanu.ac.rs/123456789/3521",
abstract = "Abstract Commercially available ZnO powder was mechanically activated in a planetary ball mill. In order to investigate the specific surface area, pore volume and microstructure of non-activated and mechanically activated ZnO powders the authors performed N2 physisorption, SEM and TEM. Crystallite size and lattice microstrain were analyzed by X-ray diffraction method. XRD patterns indicate that peak intensities are getting lower and expend with activation time. The reduction in crystallite size and increasing of lattice microstrain with prolonged milling time were determined applying the Rietveld's method. The difference between non-activated and the activated powder has been also observed by X-ray photoelectron spectroscopy (XPS). XPS is used for investigating the chemical bonding of ZnO powder by analyzing the energy of photoelectrons. The lattice vibration spectra were obtained using Raman spectroscopy. In Raman spectra some changes along with atypical resonant scattering were noticed, which were caused by mechanical activation. © 2015 Published by Elsevier B.V.",
publisher = "Elsevier",
journal = "Journal of Alloys and Compounds",
title = "Structural investigation of mechanically activated ZnO powder",
pages = "971-979",
volume = "648",
doi = "10.1016/j.jallcom.2015.06.247"
}
Peleš, A., Pavlović, V. P., Filipović, S., Obradović, N., Mančić, L., Krstić, J., Mitrić, M., Vlahović, B., Rašić, G., Kosanović, D.,& Pavlović, V. B. (2015). Structural investigation of mechanically activated ZnO powder.
Journal of Alloys and CompoundsElsevier., 648, 971-979. 
https://doi.org/10.1016/j.jallcom.2015.06.247
Peleš A, Pavlović VP, Filipović S, Obradović N, Mančić L, Krstić J, Mitrić M, Vlahović B, Rašić G, Kosanović D, Pavlović VB. Structural investigation of mechanically activated ZnO powder. Journal of Alloys and Compounds. 2015;648:971-979
8
9
9

Structural investigation of mechanically activated ZnO powder

Peleš, Adriana; Pavlović, Vera P.; Filipović, Suzana; Obradović, Nina; Mančić, Lidija; Krstić, Jugoslav; Mitrić, Miodrag; Vlahović, Branislav; Rašić, Goran; Kosanović, Darko; Pavlović, Vladimir B.

(Elsevier, 2015)

TY  - JOUR
AU  - Peleš, Adriana
AU  - Pavlović, Vera P.
AU  - Filipović, Suzana
AU  - Obradović, Nina
AU  - Mančić, Lidija
AU  - Krstić, Jugoslav
AU  - Mitrić, Miodrag
AU  - Vlahović, Branislav
AU  - Rašić, Goran
AU  - Kosanović, Darko
AU  - Pavlović, Vladimir B.
PY  - 2015
UR  - http://dais.sanu.ac.rs/123456789/4673
AB  - Abstract Commercially available ZnO powder was mechanically activated in a planetary ball mill. In order to investigate the specific surface area, pore volume and microstructure of non-activated and mechanically activated ZnO powders the authors performed N2 physisorption, SEM and TEM. Crystallite size and lattice microstrain were analyzed by X-ray diffraction method. XRD patterns indicate that peak intensities are getting lower and expend with activation time. The reduction in crystallite size and increasing of lattice microstrain with prolonged milling time were determined applying the Rietveld's method. The difference between non-activated and the activated powder has been also observed by X-ray photoelectron spectroscopy (XPS). XPS is used for investigating the chemical bonding of ZnO powder by analyzing the energy of photoelectrons. The lattice vibration spectra were obtained using Raman spectroscopy. In Raman spectra some changes along with atypical resonant scattering were noticed, which were caused by mechanical activation. © 2015 Published by Elsevier B.V.
PB  - Elsevier
T2  - Journal of Alloys and Compounds
T1  - Structural investigation of mechanically activated ZnO powder
SP  - 971
EP  - 979
VL  - 648
DO  - 10.1016/j.jallcom.2015.06.247
ER  - 
@article{
author = "Peleš, Adriana and Pavlović, Vera P. and Filipović, Suzana and Obradović, Nina and Mančić, Lidija and Krstić, Jugoslav and Mitrić, Miodrag and Vlahović, Branislav and Rašić, Goran and Kosanović, Darko and Pavlović, Vladimir B.",
year = "2015",
url = "http://dais.sanu.ac.rs/123456789/4673",
abstract = "Abstract Commercially available ZnO powder was mechanically activated in a planetary ball mill. In order to investigate the specific surface area, pore volume and microstructure of non-activated and mechanically activated ZnO powders the authors performed N2 physisorption, SEM and TEM. Crystallite size and lattice microstrain were analyzed by X-ray diffraction method. XRD patterns indicate that peak intensities are getting lower and expend with activation time. The reduction in crystallite size and increasing of lattice microstrain with prolonged milling time were determined applying the Rietveld's method. The difference between non-activated and the activated powder has been also observed by X-ray photoelectron spectroscopy (XPS). XPS is used for investigating the chemical bonding of ZnO powder by analyzing the energy of photoelectrons. The lattice vibration spectra were obtained using Raman spectroscopy. In Raman spectra some changes along with atypical resonant scattering were noticed, which were caused by mechanical activation. © 2015 Published by Elsevier B.V.",
publisher = "Elsevier",
journal = "Journal of Alloys and Compounds",
title = "Structural investigation of mechanically activated ZnO powder",
pages = "971-979",
volume = "648",
doi = "10.1016/j.jallcom.2015.06.247"
}
Peleš, A., Pavlović, V. P., Filipović, S., Obradović, N., Mančić, L., Krstić, J., Mitrić, M., Vlahović, B., Rašić, G., Kosanović, D.,& Pavlović, V. B. (2015). Structural investigation of mechanically activated ZnO powder.
Journal of Alloys and CompoundsElsevier., 648, 971-979. 
https://doi.org/10.1016/j.jallcom.2015.06.247
Peleš A, Pavlović VP, Filipović S, Obradović N, Mančić L, Krstić J, Mitrić M, Vlahović B, Rašić G, Kosanović D, Pavlović VB. Structural investigation of mechanically activated ZnO powder. Journal of Alloys and Compounds. 2015;648:971-979
8
9
9

The influence of mechanical activation on the electrical properties of Ba0.77Sr0.23TiO3 ceramics

Kosanović, Darko; Živojinović, Jelena; Obradović, Nina; Pavlović, Vera P.; Pavlović, Vladimir B.; Peleš, Adriana; Ristić, Momčilo M.

(2014)

TY  - JOUR
AU  - Kosanović, Darko
AU  - Živojinović, Jelena
AU  - Obradović, Nina
AU  - Pavlović, Vera P.
AU  - Pavlović, Vladimir B.
AU  - Peleš, Adriana
AU  - Ristić, Momčilo M.
PY  - 2014
UR  - http://dais.sanu.ac.rs/123456789/543
AB  - Ferroelectric barium strontium titanate (Ba0.77Sr0.23TiO3), BST, was prepared by solid-state reactions using as the starting compounds powder of barium carbonate (BaCO3), strontium carbonate (SrCO3) and titanium dioxide (TiO2–anatase). Non-activated mixtures and mixtures mechanically activated in a high-energy planetary ball mill (0, 5, 10, 20, 40, 80 and 120 min) were sintered at 1100, 1200, 1300 and 1400 °C for 2 h in air atmosphere. Defects and the effect of the beginning of the sintering process on the microstructure were investigated by scanning electron microscopy (SEM). Electrical measurements (loss tangent and resistivity as the function of frequency XC=f(log ν)) were performed for ceramics sintered at 1400 °C for 2 h. It has been found that mechanical activation can reduce the sintering temperature by around 100 °C, which leads to significant energy savings. Furthermore, activated for 80 min and sintered at 1400 °C for 2 h exhibit the largest density values and have about 36% lower dielectric loss at a frequency of 1 kHz and about 57% at a frequency of 10 kHz than the samples obtained from the initial non-activated powder sintered under the same conditions.
T2  - Ceramics International
T1  - The influence of mechanical activation on the electrical properties of Ba0.77Sr0.23TiO3 ceramics
SP  - 11883
EP  - 11888
VL  - 40
IS  - 8, Part A
DO  - 10.1016/j.ceramint.2014.04.023
ER  - 
@article{
author = "Kosanović, Darko and Živojinović, Jelena and Obradović, Nina and Pavlović, Vera P. and Pavlović, Vladimir B. and Peleš, Adriana and Ristić, Momčilo M.",
year = "2014",
url = "http://dais.sanu.ac.rs/123456789/543",
abstract = "Ferroelectric barium strontium titanate (Ba0.77Sr0.23TiO3), BST, was prepared by solid-state reactions using as the starting compounds powder of barium carbonate (BaCO3), strontium carbonate (SrCO3) and titanium dioxide (TiO2–anatase). Non-activated mixtures and mixtures mechanically activated in a high-energy planetary ball mill (0, 5, 10, 20, 40, 80 and 120 min) were sintered at 1100, 1200, 1300 and 1400 °C for 2 h in air atmosphere. Defects and the effect of the beginning of the sintering process on the microstructure were investigated by scanning electron microscopy (SEM). Electrical measurements (loss tangent and resistivity as the function of frequency XC=f(log ν)) were performed for ceramics sintered at 1400 °C for 2 h. It has been found that mechanical activation can reduce the sintering temperature by around 100 °C, which leads to significant energy savings. Furthermore, activated for 80 min and sintered at 1400 °C for 2 h exhibit the largest density values and have about 36% lower dielectric loss at a frequency of 1 kHz and about 57% at a frequency of 10 kHz than the samples obtained from the initial non-activated powder sintered under the same conditions.",
journal = "Ceramics International",
title = "The influence of mechanical activation on the electrical properties of Ba0.77Sr0.23TiO3 ceramics",
pages = "11883-11888",
volume = "40",
number = "8, Part A",
doi = "10.1016/j.ceramint.2014.04.023"
}
Kosanović, D., Živojinović, J., Obradović, N., Pavlović, V. P., Pavlović, V. B., Peleš, A.,& Ristić, M. M. (2014). The influence of mechanical activation on the electrical properties of Ba0.77Sr0.23TiO3 ceramics.
Ceramics International, 40(8, Part A), 11883-11888. 
https://doi.org/10.1016/j.ceramint.2014.04.023
Kosanović D, Živojinović J, Obradović N, Pavlović VP, Pavlović VB, Peleš A, Ristić MM. The influence of mechanical activation on the electrical properties of Ba0.77Sr0.23TiO3 ceramics. Ceramics International. 2014;40(8, Part A):11883-11888
3
5
5

Advantages of combined sintering compared to conventional sintering of mechanically activated magnesium titanate

Filipović, Suzana; Obradović, Nina; Pavlović, Vladimir B.; Kosanović, Darko; Mitrić, Miodrag; Pouchly, Vaclav; Kachlik, Martin; Maca, Karel

(Belgrade : International Institute for the Science of Sintering, 2014)

TY  - JOUR
AU  - Filipović, Suzana
AU  - Obradović, Nina
AU  - Pavlović, Vladimir B.
AU  - Kosanović, Darko
AU  - Mitrić, Miodrag
AU  - Pouchly, Vaclav
AU  - Kachlik, Martin
AU  - Maca, Karel
PY  - 2014
UR  - http://dais.sanu.ac.rs/123456789/650
AB  - In this article, the advantages of combined sintering in comparison with the conventional one, of mechanically activated magnesium titanate ceramic were investigated. The stoichiometric mixtures of MgO and TiO2 were mechano-chemically activated for 0, 10, 40, 80 and 160 minutes by ball milling and then isostatically pressed (CIP) to form green bodies. Conventional sintering was realized by heating up to 1400 oC and hold for 30 minutes in air atmosphere. Resulting ceramic samples with closed porosity were post-sintered by pressure assisted technique Hot Isostatic Pressing (HIP) at 1280 oC/3h in argon atmosphere with a pressure of 200 MPa. The best results were observed in the case of samples post-sintered by HIP, when single-phase MgTiO3 samples with relative density of 96% were prepared. [Projekat Ministarstva nauke Republike Srbije, br. OI 172057]
PB  - Belgrade : International Institute for the Science of Sintering
T2  - Science of Sintering
T1  - Advantages of combined sintering compared to conventional sintering of mechanically activated magnesium titanate
SP  - 283
EP  - 290
VL  - 46
IS  - 3
DO  - 10.2298/SOS1403283F
ER  - 
@article{
author = "Filipović, Suzana and Obradović, Nina and Pavlović, Vladimir B. and Kosanović, Darko and Mitrić, Miodrag and Pouchly, Vaclav and Kachlik, Martin and Maca, Karel",
year = "2014",
url = "http://dais.sanu.ac.rs/123456789/650",
abstract = "In this article, the advantages of combined sintering in comparison with the conventional one, of mechanically activated magnesium titanate ceramic were investigated. The stoichiometric mixtures of MgO and TiO2 were mechano-chemically activated for 0, 10, 40, 80 and 160 minutes by ball milling and then isostatically pressed (CIP) to form green bodies. Conventional sintering was realized by heating up to 1400 oC and hold for 30 minutes in air atmosphere. Resulting ceramic samples with closed porosity were post-sintered by pressure assisted technique Hot Isostatic Pressing (HIP) at 1280 oC/3h in argon atmosphere with a pressure of 200 MPa. The best results were observed in the case of samples post-sintered by HIP, when single-phase MgTiO3 samples with relative density of 96% were prepared. [Projekat Ministarstva nauke Republike Srbije, br. OI 172057]",
publisher = "Belgrade : International Institute for the Science of Sintering",
journal = "Science of Sintering",
title = "Advantages of combined sintering compared to conventional sintering of mechanically activated magnesium titanate",
pages = "283-290",
volume = "46",
number = "3",
doi = "10.2298/SOS1403283F"
}
Filipović, S., Obradović, N., Pavlović, V. B., Kosanović, D., Mitrić, M., Pouchly, V., Kachlik, M.,& Maca, K. (2014). Advantages of combined sintering compared to conventional sintering of mechanically activated magnesium titanate.
Science of SinteringBelgrade : International Institute for the Science of Sintering., 46(3), 283-290. 
https://doi.org/10.2298/SOS1403283F
Filipović S, Obradović N, Pavlović VB, Kosanović D, Mitrić M, Pouchly V, Kachlik M, Maca K. Advantages of combined sintering compared to conventional sintering of mechanically activated magnesium titanate. Science of Sintering. 2014;46(3):283-290
3
3
4

Sintering of cordierite in the presence of MoO3 and crystallization analysis

Đorđević, Nataša; Obradović, Nina; Kosanović, Darko; Mitrić, Miodrag; Pavlović, Vladimr P.

(Belgrade : International Institute for the Science of Sintering, 2014)

TY  - JOUR
AU  - Đorđević, Nataša
AU  - Obradović, Nina
AU  - Kosanović, Darko
AU  - Mitrić, Miodrag
AU  - Pavlović, Vladimr P.
PY  - 2014
UR  - http://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
ER  - 
@article{
author = "Đorđević, Nataša and Obradović, Nina and Kosanović, Darko and Mitrić, Miodrag and Pavlović, Vladimr P.",
year = "2014",
url = "http://dais.sanu.ac.rs/123456789/737",
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"
}
Đorđević, N., Obradović, N., Kosanović, D., Mitrić, M.,& Pavlović, V. P. (2014). Sintering of cordierite in the presence of MoO3 and crystallization analysis.
Science of SinteringBelgrade : International Institute for the Science of Sintering., 46(3), 307-313. 
https://doi.org/10.2298/SOS1403307D
Đorđević N, Obradović N, Kosanović D, Mitrić M, Pavlović VP. Sintering of cordierite in the presence of MoO3 and crystallization analysis. Science of Sintering. 2014;46(3):307-313
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The influence of mechanical activation on the electrical properties of Ba0.77Sr0.23TiO3 ceramics

Kosanović, Darko; Živojinović, Jelena; Obradović, Nina; Pavlović, Vera P.; Pavlović, Vladimir B.; Peleš, Adriana; Ristić, Momčilo M.

(Elsevier, 2014)

TY  - JOUR
AU  - Kosanović, Darko
AU  - Živojinović, Jelena
AU  - Obradović, Nina
AU  - Pavlović, Vera P.
AU  - Pavlović, Vladimir B.
AU  - Peleš, Adriana
AU  - Ristić, Momčilo M.
PY  - 2014
UR  - http://dais.sanu.ac.rs/123456789/544
AB  - Ferroelectric barium strontium titanate (Ba0.77Sr0.23TiO3), BST, was prepared by solid-state reactions using as the starting compounds powder of barium carbonate (BaCO3), strontium carbonate (SrCO3) and titanium dioxide (TiO2–anatase). Non-activated mixtures and mixtures mechanically activated in a high-energy planetary ball mill (0, 5, 10, 20, 40, 80 and 120 min) were sintered at 1100, 1200, 1300 and 1400 °C for 2 h in air atmosphere. Defects and the effect of the beginning of the sintering process on the microstructure were investigated by scanning electron microscopy (SEM). Electrical measurements (loss tangent and resistivity as the function of frequency XC=f(log ν)) were performed for ceramics sintered at 1400 °C for 2 h. It has been found that mechanical activation can reduce the sintering temperature by around 100 °C, which leads to significant energy savings. Furthermore, activated for 80 min and sintered at 1400 °C for 2 h exhibit the largest density values and have about 36% lower dielectric loss at a frequency of 1 kHz and about 57% at a frequency of 10 kHz than the samples obtained from the initial non-activated powder sintered under the same conditions.
PB  - Elsevier
T2  - Ceramics International
T1  - The influence of mechanical activation on the electrical properties of Ba0.77Sr0.23TiO3 ceramics
SP  - 11883
EP  - 11888
IS  - 8, Part A
DO  - 10.1016/j.ceramint.2014.04.023
ER  - 
@article{
author = "Kosanović, Darko and Živojinović, Jelena and Obradović, Nina and Pavlović, Vera P. and Pavlović, Vladimir B. and Peleš, Adriana and Ristić, Momčilo M.",
year = "2014",
url = "http://dais.sanu.ac.rs/123456789/544",
abstract = "Ferroelectric barium strontium titanate (Ba0.77Sr0.23TiO3), BST, was prepared by solid-state reactions using as the starting compounds powder of barium carbonate (BaCO3), strontium carbonate (SrCO3) and titanium dioxide (TiO2–anatase). Non-activated mixtures and mixtures mechanically activated in a high-energy planetary ball mill (0, 5, 10, 20, 40, 80 and 120 min) were sintered at 1100, 1200, 1300 and 1400 °C for 2 h in air atmosphere. Defects and the effect of the beginning of the sintering process on the microstructure were investigated by scanning electron microscopy (SEM). Electrical measurements (loss tangent and resistivity as the function of frequency XC=f(log ν)) were performed for ceramics sintered at 1400 °C for 2 h. It has been found that mechanical activation can reduce the sintering temperature by around 100 °C, which leads to significant energy savings. Furthermore, activated for 80 min and sintered at 1400 °C for 2 h exhibit the largest density values and have about 36% lower dielectric loss at a frequency of 1 kHz and about 57% at a frequency of 10 kHz than the samples obtained from the initial non-activated powder sintered under the same conditions.",
publisher = "Elsevier",
journal = "Ceramics International",
title = "The influence of mechanical activation on the electrical properties of Ba0.77Sr0.23TiO3 ceramics",
pages = "11883-11888",
number = "8, Part A",
doi = "10.1016/j.ceramint.2014.04.023"
}
Kosanović, D., Živojinović, J., Obradović, N., Pavlović, V. P., Pavlović, V. B., Peleš, A.,& Ristić, M. M. (2014). The influence of mechanical activation on the electrical properties of Ba0.77Sr0.23TiO3 ceramics.
Ceramics InternationalElsevier., null(8, Part A), 11883-11888. 
https://doi.org/10.1016/j.ceramint.2014.04.023
Kosanović D, Živojinović J, Obradović N, Pavlović VP, Pavlović VB, Peleš A, Ristić MM. The influence of mechanical activation on the electrical properties of Ba0.77Sr0.23TiO3 ceramics. Ceramics International. 2014;(8, Part A):11883-11888
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