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  - 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  - Filipović, Suzana
AU  - Obradović, Nina
AU  - Pavlović, Vladimir B.
AU  - Mitrić, Miodrag
AU  - Đorđević, Antonije
AU  - Kachlik, Martin
AU  - Maca, Karel
PY  - 2016
UR  - https://dais.sanu.ac.rs/123456789/2310
AB  - The aim of this study is to explore the influence of the processing route on the structural and physical properties of bulk MgTiO3 ceramics. Commercially available MgO and TiO2 powders were mechanically activated in a planetary ball mill. Green bodies were formed by an isostatic pressure of 300 MPa. The sintering of these samples was done either by the Two-Step Sintering (TSS) approach or by conventional pressureless sintering followed by Hot Isostatic Pressing (post-HIPing). The first set of compacts was sintered by TSS in air at 1300 °C for 30 min and the next step was performed at 1200 °C for 20 h. The density of the obtained samples after the two-step sintering reached almost 90% of the theoretical density (%TD). The second set of compacts was sintered at 1400 °C for 30 min in air. The samples without open porosity were post-sintered by the HIP at 1200 °C for 2 h in an argon atmosphere at a pressure of 200 MPa. The density significantly increased up to 96%TD. The differences between samples prepared by these two techniques were also analyzed by XRD and SEM. The lattice vibration spectra were obtained using Raman spectroscopy and they indicate a high degree of lattice disorder, as well as high values of the oxygen vacancy concentration. Electrical characteristic were established in the frequency range from 10 kHz to 10 GHz. The choice of the processing route had considerable influence on structural and physical properties of MgTiO3 ceramics.
PB  - Elsevier
T2  - Ceramics International
T1  - Effect of consolidation parameters on structural, microstructural and electrical properties of magnesium titanate ceramics
SP  - 9887
EP  - 9898
VL  - 42
IS  - 8
DO  - 10.1016/j.ceramint.2016.03.088
UR  - https://hdl.handle.net/21.15107/rcub_dais_2310
ER  - 

@article{
author = "Filipović, Suzana and Obradović, Nina and Pavlović, Vladimir B. and Mitrić, Miodrag and Đorđević, Antonije and Kachlik, Martin and Maca, Karel",
year = "2016",
abstract = "The aim of this study is to explore the influence of the processing route on the structural and physical properties of bulk MgTiO3 ceramics. Commercially available MgO and TiO2 powders were mechanically activated in a planetary ball mill. Green bodies were formed by an isostatic pressure of 300 MPa. The sintering of these samples was done either by the Two-Step Sintering (TSS) approach or by conventional pressureless sintering followed by Hot Isostatic Pressing (post-HIPing). The first set of compacts was sintered by TSS in air at 1300 °C for 30 min and the next step was performed at 1200 °C for 20 h. The density of the obtained samples after the two-step sintering reached almost 90% of the theoretical density (%TD). The second set of compacts was sintered at 1400 °C for 30 min in air. The samples without open porosity were post-sintered by the HIP at 1200 °C for 2 h in an argon atmosphere at a pressure of 200 MPa. The density significantly increased up to 96%TD. The differences between samples prepared by these two techniques were also analyzed by XRD and SEM. The lattice vibration spectra were obtained using Raman spectroscopy and they indicate a high degree of lattice disorder, as well as high values of the oxygen vacancy concentration. Electrical characteristic were established in the frequency range from 10 kHz to 10 GHz. The choice of the processing route had considerable influence on structural and physical properties of MgTiO3 ceramics.",
publisher = "Elsevier",
journal = "Ceramics International",
title = "Effect of consolidation parameters on structural, microstructural and electrical properties of magnesium titanate ceramics",
pages = "9887-9898",
volume = "42",
number = "8",
doi = "10.1016/j.ceramint.2016.03.088",
url = "https://hdl.handle.net/21.15107/rcub_dais_2310"
}

Filipović, S., Obradović, N., Pavlović, V. B., Mitrić, M., Đorđević, A., Kachlik, M.,& Maca, K.. (2016). Effect of consolidation parameters on structural, microstructural and electrical properties of magnesium titanate ceramics. in Ceramics International
Elsevier., 42(8), 9887-9898.
https://doi.org/10.1016/j.ceramint.2016.03.088
https://hdl.handle.net/21.15107/rcub_dais_2310

Filipović S, Obradović N, Pavlović VB, Mitrić M, Đorđević A, Kachlik M, Maca K. Effect of consolidation parameters on structural, microstructural and electrical properties of magnesium titanate ceramics. in Ceramics International. 2016;42(8):9887-9898.
doi:10.1016/j.ceramint.2016.03.088
https://hdl.handle.net/21.15107/rcub_dais_2310 .

Filipović, Suzana, Obradović, Nina, Pavlović, Vladimir B., Mitrić, Miodrag, Đorđević, Antonije, Kachlik, Martin, Maca, Karel, "Effect of consolidation parameters on structural, microstructural and electrical properties of magnesium titanate ceramics" in Ceramics International, 42, no. 8 (2016):9887-9898,
https://doi.org/10.1016/j.ceramint.2016.03.088 .,
https://hdl.handle.net/21.15107/rcub_dais_2310 .