Olćan, Dragan

Link to this page

Authority KeyName Variants
orcid::0000-0003-2337-7946
  • Olćan, Dragan (10)
Projects

Author's Bibliography

Multiferroic Heterostructure BaTiO3/ε-Fe2O3 Composite Obtained by in situ Reaction

Filipović, Suzana; Obradović, Nina; Anđelković, Ljubica; Olćan, Dragan; Petrović, Jovana; Mirković, Miljana; Pavlović, Vladimir B.; Jeremić, Dejan; Vlahović, Branislav; Đorđević, Antonije

(Belgrade : International Institute for the Science of Sintering, 2021)

TY  - JOUR
AU  - Filipović, Suzana
AU  - Obradović, Nina
AU  - Anđelković, Ljubica
AU  - Olćan, Dragan
AU  - Petrović, Jovana
AU  - Mirković, Miljana
AU  - Pavlović, Vladimir B.
AU  - Jeremić, Dejan
AU  - Vlahović, Branislav
AU  - Đorđević, Antonije
PY  - 2021
AB  - Solid-state reaction between BaTiO3 and Fe2O3 was used to produce a multiferroic heterostructure composite. Commercial BaTiO3 and Fe(NO3)3•9H2O were suspended in ethanol for 30 minutes in an ultrasound bath. The prepared mixture was thermally processed at 300 oC for 6 h. Sintering at 1300 oC for 1 h resulted in a mixture of different phases, BaTiO3, BaFe12O19 and Ba12Ti28Fe15O84, which were confirmed by x-ray powder diffraction. A dense microstructure with a small volume fraction of closed porosity was indicated by the scanning electron microscopy, while a homogeneous distribution of Fe ions over BaTiO3 phase was visible from energy dispersive spectroscopy mapping. Doping of BaTiO3 with Fe2O3 resulted in formation of magnetic hexaferrite phases, as confirmed by dielectric measurements that showed a broadened maximum of the permittivity measured as a function of temperature.
PB  - Belgrade : International Institute for the Science of Sintering
T2  - Science of Sintering
T1  - Multiferroic Heterostructure BaTiO3/ε-Fe2O3 Composite Obtained by in situ Reaction
SP  - 1
EP  - 8
VL  - 53
DO  - 10.2298/SOS2101001F
ER  - 
@article{
author = "Filipović, Suzana and Obradović, Nina and Anđelković, Ljubica and Olćan, Dragan and Petrović, Jovana and Mirković, Miljana and Pavlović, Vladimir B. and Jeremić, Dejan and Vlahović, Branislav and Đorđević, Antonije",
year = "2021",
abstract = "Solid-state reaction between BaTiO3 and Fe2O3 was used to produce a multiferroic heterostructure composite. Commercial BaTiO3 and Fe(NO3)3•9H2O were suspended in ethanol for 30 minutes in an ultrasound bath. The prepared mixture was thermally processed at 300 oC for 6 h. Sintering at 1300 oC for 1 h resulted in a mixture of different phases, BaTiO3, BaFe12O19 and Ba12Ti28Fe15O84, which were confirmed by x-ray powder diffraction. A dense microstructure with a small volume fraction of closed porosity was indicated by the scanning electron microscopy, while a homogeneous distribution of Fe ions over BaTiO3 phase was visible from energy dispersive spectroscopy mapping. Doping of BaTiO3 with Fe2O3 resulted in formation of magnetic hexaferrite phases, as confirmed by dielectric measurements that showed a broadened maximum of the permittivity measured as a function of temperature.",
publisher = "Belgrade : International Institute for the Science of Sintering",
journal = "Science of Sintering",
title = "Multiferroic Heterostructure BaTiO3/ε-Fe2O3 Composite Obtained by in situ Reaction",
pages = "1-8",
volume = "53",
doi = "10.2298/SOS2101001F"
}
Filipović, S., Obradović, N., Anđelković, L., Olćan, D., Petrović, J., Mirković, M., Pavlović, V. B., Jeremić, D., Vlahović, B.,& Đorđević, A. (2021). Multiferroic Heterostructure BaTiO3/ε-Fe2O3 Composite Obtained by in situ Reaction.
Science of Sintering
Belgrade : International Institute for the Science of Sintering., 53, 1-8.
https://doi.org/10.2298/SOS2101001F
Filipović S, Obradović N, Anđelković L, Olćan D, Petrović J, Mirković M, Pavlović VB, Jeremić D, Vlahović B, Đorđević A. Multiferroic Heterostructure BaTiO3/ε-Fe2O3 Composite Obtained by in situ Reaction. Science of Sintering. 2021;53:1-8.
doi:10.2298/SOS2101001F.
Filipović Suzana, Obradović Nina, Anđelković Ljubica, Olćan Dragan, Petrović Jovana, Mirković Miljana, Pavlović Vladimir B., Jeremić Dejan, Vlahović Branislav, Đorđević Antonije, "Multiferroic Heterostructure BaTiO3/ε-Fe2O3 Composite Obtained by in situ Reaction" Science of Sintering, 53 (2021):1-8,
https://doi.org/10.2298/SOS2101001F .

Processing and properties of dense cordierite ceramics obtained through solid-state reaction and pressure-less sintering

Obradović, Nina; Pavlović, Vera P.; Kachlik, Martin; Maca, Karel; Olćan, Dragan; Đorđević, Antonije; Tshantshapanyan, Ani; Vlahović, Branislav; Pavlović, Vladimir B.

(Taylor and Francis, 2019)

TY  - JOUR
AU  - Obradović, Nina
AU  - Pavlović, Vera P.
AU  - Kachlik, Martin
AU  - Maca, Karel
AU  - Olćan, Dragan
AU  - Đorđević, Antonije
AU  - Tshantshapanyan, Ani
AU  - Vlahović, Branislav
AU  - Pavlović, Vladimir B.
PY  - 2019
AB  - Sintering of pure cordierite 2MgO:2Al2O3:5SiO2, and cordierite with the addition of 5 mass % TeO2 was studied. Green bodies were prepared from powder mixtures mechanically activated in a high-energy planetary mill, shaped by uniaxial (20 MPa) and cold isostatic pressing (1000 MPa). The pressure-less sintering of these specimens was performed at 1350°C for 1 h. High relative density over 95% of the theoretical value was obtained through solid-state reaction and pressure-less sintering of powder activated for 40 min, and for the first time reported in the literature. Phase composition and microstructures of sintered samples were determined by XRD and SEM, coupled with EDS mapping. The real part of the complex relative permittivity of the samples was measured at 200 MHz. The loss tangent of all samples was below the resolution of the measurement setup. A strong correlation between the relative permittivity and the density agrees with previously published data.
PB  - Taylor and Francis
T2  - Advances in Applied Ceramics
T1  - Processing and properties of dense cordierite ceramics obtained through solid-state reaction and pressure-less sintering
SP  - 241
EP  - 248
VL  - 118
IS  - 5
DO  - 10.1080/17436753.2018.1548150
UR  - https://hdl.handle.net/21.15107/rcub_dais_4557
ER  - 
@article{
author = "Obradović, Nina and Pavlović, Vera P. and Kachlik, Martin and Maca, Karel and Olćan, Dragan and Đorđević, Antonije and Tshantshapanyan, Ani and Vlahović, Branislav and Pavlović, Vladimir B.",
year = "2019",
abstract = "Sintering of pure cordierite 2MgO:2Al2O3:5SiO2, and cordierite with the addition of 5 mass % TeO2 was studied. Green bodies were prepared from powder mixtures mechanically activated in a high-energy planetary mill, shaped by uniaxial (20 MPa) and cold isostatic pressing (1000 MPa). The pressure-less sintering of these specimens was performed at 1350°C for 1 h. High relative density over 95% of the theoretical value was obtained through solid-state reaction and pressure-less sintering of powder activated for 40 min, and for the first time reported in the literature. Phase composition and microstructures of sintered samples were determined by XRD and SEM, coupled with EDS mapping. The real part of the complex relative permittivity of the samples was measured at 200 MHz. The loss tangent of all samples was below the resolution of the measurement setup. A strong correlation between the relative permittivity and the density agrees with previously published data.",
publisher = "Taylor and Francis",
journal = "Advances in Applied Ceramics",
title = "Processing and properties of dense cordierite ceramics obtained through solid-state reaction and pressure-less sintering",
pages = "241-248",
volume = "118",
number = "5",
doi = "10.1080/17436753.2018.1548150",
url = "https://hdl.handle.net/21.15107/rcub_dais_4557"
}
Obradović, N., Pavlović, V. P., Kachlik, M., Maca, K., Olćan, D., Đorđević, A., Tshantshapanyan, A., Vlahović, B.,& Pavlović, V. B. (2019). Processing and properties of dense cordierite ceramics obtained through solid-state reaction and pressure-less sintering.
Advances in Applied Ceramics
Taylor and Francis., 118(5), 241-248.
https://doi.org/10.1080/17436753.2018.1548150
Obradović N, Pavlović VP, Kachlik M, Maca K, Olćan D, Đorđević A, Tshantshapanyan A, Vlahović B, Pavlović VB. Processing and properties of dense cordierite ceramics obtained through solid-state reaction and pressure-less sintering. Advances in Applied Ceramics. 2019;118(5):241-248.
doi:10.1080/17436753.2018.1548150.
Obradović Nina, Pavlović Vera P., Kachlik Martin, Maca Karel, Olćan Dragan, Đorđević Antonije, Tshantshapanyan Ani, Vlahović Branislav, Pavlović Vladimir B., "Processing and properties of dense cordierite ceramics obtained through solid-state reaction and pressure-less sintering" Advances in Applied Ceramics, 118, no. 5 (2019):241-248,
https://doi.org/10.1080/17436753.2018.1548150 .
3
3
3

Characterization of pressure-less sintered MgO-Al2O3-SiO2-TeO2 system

Obradović, Nina; Đorđević, Nataša; Kosanović, Darko; Filipović, Suzana; Kachlik, Martin; Maca, Karel; Olćan, Dragan; Đorđević, Antonije; Pavlović, Vladimir B.

(Belgrade : Materials Research Society of Serbia, 2017)

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
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.
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.
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. Programme and The Book of Abstracts / Nineteenth Annual Conference YUCOMAT 2017, Herceg Novi, September 4-8, 2017. 2017;:70-70.
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" Programme and The Book of Abstracts / Nineteenth Annual Conference YUCOMAT 2017, Herceg Novi, September 4-8, 2017 (2017):70-70

Assessing electrical properties of ceramic samples

Olćan, Dragan; Obradović, Nina; Filipović, Suzana; Terzić, Anja; Pavlović, Vladimir B.; Kachlik, Martin; Maca, Karel; Đorđević, Antonije

(Belgrade : Serbian Ceramic Society, 2017)

TY  - CONF
AU  - Olćan, Dragan
AU  - Obradović, Nina
AU  - Filipović, Suzana
AU  - Terzić, Anja
AU  - Pavlović, Vladimir B.
AU  - Kachlik, Martin
AU  - Maca, Karel
AU  - Đorđević, Antonije
PY  - 2017
AB  - We present an overview of electromagnetic numerical techniques and measurement apparatus that have been used for assessing electrical properties of ceramic samples. The complex permittivity of the ceramics is typically the first electromagnetic property of interest. In the measurement approach that we use, ceramic samples, in the shape of pills with metalized faces, are placed in either a proprietary coaxial chamber or in an open fixture. The scattering parameter (reflection coefficient) is measured using a network analyzer. For the deembedding of the complex permittivity of a sample one needs precise electromagnetic simulations, including detailed models of the chamber or the open fixture. For lower and intermediate frequencies we use a numerical technique for electrostatic analysis, based on the method of moments with Galerkin testing. We create a database that is used afterwards for evaluation of the complex permittivity practically in real time. For higher frequencies, a full electrodynamic model of the chamber is developed with WIPL-D software. For all our deembedding techniques, we have also developed a detailed model of losses in the SMA coaxial connectors, which is essential for a precise evaluation of the imaginary part of the complex permittivity for low-loss dielectrics. We present results of several measurements in order to illustrate the used techniques.
PB  - Belgrade : Serbian Ceramic Society
C3  - Program and the Book of Abstracts / Serbian Ceramic Society Conference Advanced Ceramics and Application VI: New Frontiers in Multifunctional Material Science and Processing, Serbia, Belgrade, September 18-20, 2017
T1  - Assessing electrical properties of ceramic samples
SP  - 51
EP  - 52
UR  - https://hdl.handle.net/21.15107/rcub_dais_4824
ER  - 
@conference{
author = "Olćan, Dragan and Obradović, Nina and Filipović, Suzana and Terzić, Anja and Pavlović, Vladimir B. and Kachlik, Martin and Maca, Karel and Đorđević, Antonije",
year = "2017",
abstract = "We present an overview of electromagnetic numerical techniques and measurement apparatus that have been used for assessing electrical properties of ceramic samples. The complex permittivity of the ceramics is typically the first electromagnetic property of interest. In the measurement approach that we use, ceramic samples, in the shape of pills with metalized faces, are placed in either a proprietary coaxial chamber or in an open fixture. The scattering parameter (reflection coefficient) is measured using a network analyzer. For the deembedding of the complex permittivity of a sample one needs precise electromagnetic simulations, including detailed models of the chamber or the open fixture. For lower and intermediate frequencies we use a numerical technique for electrostatic analysis, based on the method of moments with Galerkin testing. We create a database that is used afterwards for evaluation of the complex permittivity practically in real time. For higher frequencies, a full electrodynamic model of the chamber is developed with WIPL-D software. For all our deembedding techniques, we have also developed a detailed model of losses in the SMA coaxial connectors, which is essential for a precise evaluation of the imaginary part of the complex permittivity for low-loss dielectrics. We present results of several measurements in order to illustrate the used techniques.",
publisher = "Belgrade : Serbian Ceramic Society",
journal = "Program and the Book of Abstracts / Serbian Ceramic Society Conference Advanced Ceramics and Application VI: New Frontiers in Multifunctional Material Science and Processing, Serbia, Belgrade, September 18-20, 2017",
title = "Assessing electrical properties of ceramic samples",
pages = "51-52",
url = "https://hdl.handle.net/21.15107/rcub_dais_4824"
}
Olćan, D., Obradović, N., Filipović, S., Terzić, A., Pavlović, V. B., Kachlik, M., Maca, K.,& Đorđević, A. (2017). Assessing electrical properties of ceramic samples.
Program and the Book of Abstracts / Serbian Ceramic Society Conference Advanced Ceramics and Application VI: New Frontiers in Multifunctional Material Science and Processing, Serbia, Belgrade, September 18-20, 2017
Belgrade : Serbian Ceramic Society., 51-52.
Olćan D, Obradović N, Filipović S, Terzić A, Pavlović VB, Kachlik M, Maca K, Đorđević A. Assessing electrical properties of ceramic samples. Program and the Book of Abstracts / Serbian Ceramic Society Conference Advanced Ceramics and Application VI: New Frontiers in Multifunctional Material Science and Processing, Serbia, Belgrade, September 18-20, 2017. 2017;:51-52.
Olćan Dragan, Obradović Nina, Filipović Suzana, Terzić Anja, Pavlović Vladimir B., Kachlik Martin, Maca Karel, Đorđević Antonije, "Assessing electrical properties of ceramic samples" Program and the Book of Abstracts / Serbian Ceramic Society Conference Advanced Ceramics and Application VI: New Frontiers in Multifunctional Material Science and Processing, Serbia, Belgrade, September 18-20, 2017 (2017):51-52

Influence of different bonding and fluxing agents on the sintering behavior and dielectric properties of steatite ceramic materials

Terzić, Anja; Obradović, Nina; Stojanović, Jovica; Pavlović, Vladimir B.; Andrić, Ljubiša; Olćan, Dragan; Đorđević, Antonije

(Elsevier, 2017)

TY  - JOUR
AU  - Terzić, Anja
AU  - Obradović, Nina
AU  - Stojanović, Jovica
AU  - Pavlović, Vladimir B.
AU  - Andrić, Ljubiša
AU  - Olćan, Dragan
AU  - Đorđević, Antonije
PY  - 2017
AB  - The focus of the study was on providing insights into interconnections between sintering and development of the crystalline microstructure, and consequently variations in dielectric behavior of four steatites fabricated from a low-cost raw material, i.e. talc. The changes, induced by the alternations of the binders (bentonite, kaolin clay) and fluxing agents (BaCO3, feldspar), were monitored in the temperature range 1000° to 1250 °C in which complete densification and re-crystallization of the investigated structures were accomplished. The critical points in the synthesis of steatite materials were assessed by instrumental analyses. Crystallinity changes and mineral phase transition during sintering were monitored by X-ray diffraction technique. Microstructural visualization of the samples and the spatial arrangements of individual chemical elements were achieved via scanning electron microscopy accompanied with EDS mapping. The thermal stability was observed on the green mixtures using differential thermal and thermo gravimetric analyses. Electrical measurements recorded variations of the dielectric constant (εr) and loss tangent (tan δ) as a function of the sintering temperature. The investigation highlighted critical design points, as well as the optimal combinations of the raw materials for production of the steatite ceramics for advanced electrical engineering applications.
PB  - Elsevier
T2  - Ceramics International
T1  - Influence of different bonding and fluxing agents on the sintering behavior and dielectric properties of steatite ceramic materials
SP  - 13264
EP  - 13275
VL  - 43
IS  - 16
DO  - 10.1016/j.ceramint.2017.07.024
UR  - https://hdl.handle.net/21.15107/rcub_dais_2356
ER  - 
@article{
author = "Terzić, Anja and Obradović, Nina and Stojanović, Jovica and Pavlović, Vladimir B. and Andrić, Ljubiša and Olćan, Dragan and Đorđević, Antonije",
year = "2017",
abstract = "The focus of the study was on providing insights into interconnections between sintering and development of the crystalline microstructure, and consequently variations in dielectric behavior of four steatites fabricated from a low-cost raw material, i.e. talc. The changes, induced by the alternations of the binders (bentonite, kaolin clay) and fluxing agents (BaCO3, feldspar), were monitored in the temperature range 1000° to 1250 °C in which complete densification and re-crystallization of the investigated structures were accomplished. The critical points in the synthesis of steatite materials were assessed by instrumental analyses. Crystallinity changes and mineral phase transition during sintering were monitored by X-ray diffraction technique. Microstructural visualization of the samples and the spatial arrangements of individual chemical elements were achieved via scanning electron microscopy accompanied with EDS mapping. The thermal stability was observed on the green mixtures using differential thermal and thermo gravimetric analyses. Electrical measurements recorded variations of the dielectric constant (εr) and loss tangent (tan δ) as a function of the sintering temperature. The investigation highlighted critical design points, as well as the optimal combinations of the raw materials for production of the steatite ceramics for advanced electrical engineering applications.",
publisher = "Elsevier",
journal = "Ceramics International",
title = "Influence of different bonding and fluxing agents on the sintering behavior and dielectric properties of steatite ceramic materials",
pages = "13264-13275",
volume = "43",
number = "16",
doi = "10.1016/j.ceramint.2017.07.024",
url = "https://hdl.handle.net/21.15107/rcub_dais_2356"
}
Terzić, A., Obradović, N., Stojanović, J., Pavlović, V. B., Andrić, L., Olćan, D.,& Đorđević, A. (2017). Influence of different bonding and fluxing agents on the sintering behavior and dielectric properties of steatite ceramic materials.
Ceramics International
Elsevier., 43(16), 13264-13275.
https://doi.org/10.1016/j.ceramint.2017.07.024
Terzić A, Obradović N, Stojanović J, Pavlović VB, Andrić L, Olćan D, Đorđević A. Influence of different bonding and fluxing agents on the sintering behavior and dielectric properties of steatite ceramic materials. Ceramics International. 2017;43(16):13264-13275.
doi:10.1016/j.ceramint.2017.07.024.
Terzić Anja, Obradović Nina, Stojanović Jovica, Pavlović Vladimir B., Andrić Ljubiša, Olćan Dragan, Đorđević Antonije, "Influence of different bonding and fluxing agents on the sintering behavior and dielectric properties of steatite ceramic materials" Ceramics International, 43, no. 16 (2017):13264-13275,
https://doi.org/10.1016/j.ceramint.2017.07.024 .
2
2
2

Electrical properties of magnesium titanate ceramics post-sintered by hot isostatic pressing

Đorđević, Antonije; Olćan, Dragan; Obradović, Nina; Paunović, Vesna; Filipović, Suzana; Pavlović, Vladimir B.

(Belgrade : International Institute for the Science of Sintering, 2017)

TY  - JOUR
AU  - Đorđević, Antonije
AU  - Olćan, Dragan
AU  - Obradović, Nina
AU  - Paunović, Vesna
AU  - Filipović, Suzana
AU  - Pavlović, Vladimir B.
PY  - 2017
AB  - Post-sintering of magnesium titanate ceramics by hot isostatic pressing (HIP) in an oxygen-free atmosphere significantly alters various electrical properties of the product. In particular, the sintered material becomes a semiconductor. The aims of this paper are: to extend our investigations of the electrical properties of this material by expanding the frequency range of measurements, to design interpolation formulas for the frequency dependence of the complex relative permittivity, and to propose HIP-sintered magnesium titanate as a material for thermistors that have a negative-temperature-coefficient resistance (NTCR), as well as for varistors.
PB  - Belgrade : International Institute for the Science of Sintering
T2  - Science of Sintering
T1  - Electrical properties of magnesium titanate ceramics post-sintered by hot isostatic pressing
SP  - 373
EP  - 380
VL  - 49
IS  - 4
DO  - 10.2298/SOS1704373D
UR  - https://hdl.handle.net/21.15107/rcub_dais_2369
ER  - 
@article{
author = "Đorđević, Antonije and Olćan, Dragan and Obradović, Nina and Paunović, Vesna and Filipović, Suzana and Pavlović, Vladimir B.",
year = "2017",
abstract = "Post-sintering of magnesium titanate ceramics by hot isostatic pressing (HIP) in an oxygen-free atmosphere significantly alters various electrical properties of the product. In particular, the sintered material becomes a semiconductor. The aims of this paper are: to extend our investigations of the electrical properties of this material by expanding the frequency range of measurements, to design interpolation formulas for the frequency dependence of the complex relative permittivity, and to propose HIP-sintered magnesium titanate as a material for thermistors that have a negative-temperature-coefficient resistance (NTCR), as well as for varistors.",
publisher = "Belgrade : International Institute for the Science of Sintering",
journal = "Science of Sintering",
title = "Electrical properties of magnesium titanate ceramics post-sintered by hot isostatic pressing",
pages = "373-380",
volume = "49",
number = "4",
doi = "10.2298/SOS1704373D",
url = "https://hdl.handle.net/21.15107/rcub_dais_2369"
}
Đorđević, A., Olćan, D., Obradović, N., Paunović, V., Filipović, S.,& Pavlović, V. B. (2017). Electrical properties of magnesium titanate ceramics post-sintered by hot isostatic pressing.
Science of Sintering
Belgrade : International Institute for the Science of Sintering., 49(4), 373-380.
https://doi.org/10.2298/SOS1704373D
Đorđević A, Olćan D, Obradović N, Paunović V, Filipović S, Pavlović VB. Electrical properties of magnesium titanate ceramics post-sintered by hot isostatic pressing. Science of Sintering. 2017;49(4):373-380.
doi:10.2298/SOS1704373D.
Đorđević Antonije, Olćan Dragan, Obradović Nina, Paunović Vesna, Filipović Suzana, Pavlović Vladimir B., "Electrical properties of magnesium titanate ceramics post-sintered by hot isostatic pressing" Science of Sintering, 49, no. 4 (2017):373-380,
https://doi.org/10.2298/SOS1704373D .
1
4
4

Microstructural and electrical properties of cordierite-based ceramics obtained after two-step sintering technique

Obradović, Nina; Đorđević, Nataša; Filipović, Suzana; Kosanović, Darko; Pavlović, Vladimir B.; Olćan, Dragan; Đorđević, Antonije; Kachlik, Martin; Maca, Karel

(Insternational Institute for the Science of Sintering, 2016)

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
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.
Science of Sintering
Insternational Institute for the Science of Sintering., 48(2), 157-165.
https://doi.org/10.2298/SOS1602157O
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. Science of Sintering. 2016;48(2):157-165.
doi:10.2298/SOS1602157O.
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" Science of Sintering, 48, no. 2 (2016):157-165,
https://doi.org/10.2298/SOS1602157O .
6
12
12

Microstructural and electrical properties of cordierite-based ceramics obtained after two-step sintering technique

Obradović, Nina; Filipović, Suzana; Đorđević, Nataša; Kosanović, Darko; Pavlović, Vladimir B.; Olćan, Dragan; Đorđević, Antonije; Kachlik, Martin; Maca, Karel

(2016)

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
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.
Science of Sintering, 48(2), 157-165.
https://doi.org/10.2298/SOS1602157O
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. Science of Sintering. 2016;48(2):157-165.
doi:10.2298/SOS1602157O.
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" Science of Sintering, 48, no. 2 (2016):157-165,
https://doi.org/10.2298/SOS1602157O .
6
12
12

Effects of mechanical activation and two-step sintering on the structure and electrical properties of cordierite-based ceramics

Obradović, Nina; Filipović, Suzana; Đorđević, Nataša; Kosanović, Darko; Marković, Smilja; Pavlović, Vladimir B.; Olćan, Dragan; Đorđević, Antonije; Kachlik, Martin; Maca, Karel

(Elsevier, 2016)

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
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.
Ceramics International
Elsevier., 42(12), 13909-13918.
https://doi.org/10.1016/j.ceramint.2016.05.201
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. Ceramics International. 2016;42(12):13909-13918.
doi:10.1016/j.ceramint.2016.05.201.
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" Ceramics International, 42, no. 12 (2016):13909-13918,
https://doi.org/10.1016/j.ceramint.2016.05.201 .
19
15
21

Measurement of Permittivity of Solid and Liquid Dielectrics in Coaxial Chambers

Đorđević, Antonije; Dinkić, Jelena; Stevanović, Marija; Olćan, Dragan; Filipović, Suzana; Obradović, Nina

(Belgrade : National Society for Microwave Technique, Technologies and Systems and Serbia and Montenegro IEEE MTT-S Chapter, 2016)

TY  - JOUR
AU  - Đorđević, Antonije
AU  - Dinkić, Jelena
AU  - Stevanović, Marija
AU  - Olćan, Dragan
AU  - Filipović, Suzana
AU  - Obradović, Nina
PY  - 2016
AB  - We present two coaxial chambers for measurements of  the  complex  permittivity of solid  and  liquid  samples, in a frequency range that is in the transition between lower frequencies, here  parallel-plate capacitor techniques are used, and higher(microwave) frequencies, where antennas, open coaxial  lines, and  waveguide s  are  employed.  Using  a  network  analyzer,  we  measure  the  reflection  coefficient  of  the chamber. From the obtained results, we extract the relative permittivity of the  measured  sample  using  a  quasistatic  or  a  dynamic  model  of  the chamber with the sample.
PB  - Belgrade : National Society for Microwave Technique, Technologies and Systems and Serbia and Montenegro IEEE MTT-S Chapter
T2  - Microwave Review
T1  - Measurement of Permittivity of Solid and Liquid Dielectrics in Coaxial Chambers
SP  - 3
EP  - 9
VL  - 22
IS  - 2
UR  - https://hdl.handle.net/21.15107/rcub_dais_2319
ER  - 
@article{
author = "Đorđević, Antonije and Dinkić, Jelena and Stevanović, Marija and Olćan, Dragan and Filipović, Suzana and Obradović, Nina",
year = "2016",
abstract = "We present two coaxial chambers for measurements of  the  complex  permittivity of solid  and  liquid  samples, in a frequency range that is in the transition between lower frequencies, here  parallel-plate capacitor techniques are used, and higher(microwave) frequencies, where antennas, open coaxial  lines, and  waveguide s  are  employed.  Using  a  network  analyzer,  we  measure  the  reflection  coefficient  of  the chamber. From the obtained results, we extract the relative permittivity of the  measured  sample  using  a  quasistatic  or  a  dynamic  model  of  the chamber with the sample.",
publisher = "Belgrade : National Society for Microwave Technique, Technologies and Systems and Serbia and Montenegro IEEE MTT-S Chapter",
journal = "Microwave Review",
title = "Measurement of Permittivity of Solid and Liquid Dielectrics in Coaxial Chambers",
pages = "3-9",
volume = "22",
number = "2",
url = "https://hdl.handle.net/21.15107/rcub_dais_2319"
}
Đorđević, A., Dinkić, J., Stevanović, M., Olćan, D., Filipović, S.,& Obradović, N. (2016). Measurement of Permittivity of Solid and Liquid Dielectrics in Coaxial Chambers.
Microwave Review
Belgrade : National Society for Microwave Technique, Technologies and Systems and Serbia and Montenegro IEEE MTT-S Chapter., 22(2), 3-9.
Đorđević A, Dinkić J, Stevanović M, Olćan D, Filipović S, Obradović N. Measurement of Permittivity of Solid and Liquid Dielectrics in Coaxial Chambers. Microwave Review. 2016;22(2):3-9.
Đorđević Antonije, Dinkić Jelena, Stevanović Marija, Olćan Dragan, Filipović Suzana, Obradović Nina, "Measurement of Permittivity of Solid and Liquid Dielectrics in Coaxial Chambers" Microwave Review, 22, no. 2 (2016):3-9