TY  - CONF
AU  - Đorđević, Nataša
AU  - Obradović, Nina
AU  - Filipović, Suzana
AU  - Kosanović, Darko
AU  - Marković, Smilja
AU  - Mitrić, Miodrag
AU  - Pavlović, Vladimir B.
PY  - 2016
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7552
AB  - Cordierite 2MgO+2Al2O3+5SiO2 is frequently used ceramic material, that is commonly used as a carrier of electrical components due to its low dielectric constant (~ 5), and low temperature thermal expansion coefficient (20•10-7 ºC-1). In order to accelerate the process of sintering, 5.00 mass% TeO2 was added to the starting mixtures. System was tested in two parallel mixtures, one with no added additives, and the other one with TeO2. The mechanical activation of the both mixtures was performed in a high-energy ball mill in time intervals from 0 to 40 min with ball to powder mass ratio 1:40. The particle size analysis (PSA) was employed in order to determine the changes in the particle size of the mechanically treated powders. The phase composition of the starting powders as well as microstructures was analyzed by the means of X-ray diffraction method and SEM.
PB  - Belgrade : Materials Research Society of Serbia
C3  - YUCOMAT 2016 : 18th Annual Conference YUCOMAT 2016 : programme and the book of abstracts; September 5-10, Herceg Novi
T1  - Influence of mechanical activation on the MgO-Al2O3-SiO2 system with TeO2
SP  - 75
EP  - 75
UR  - https://hdl.handle.net/21.15107/rcub_vinar_7552
ER  - 

@conference{
author = "Đorđević, Nataša and Obradović, Nina and Filipović, Suzana and Kosanović, Darko and Marković, Smilja and Mitrić, Miodrag and Pavlović, Vladimir B.",
year = "2016",
abstract = "Cordierite 2MgO+2Al2O3+5SiO2 is frequently used ceramic material, that is commonly used as a carrier of electrical components due to its low dielectric constant (~ 5), and low temperature thermal expansion coefficient (20•10-7 ºC-1). In order to accelerate the process of sintering, 5.00 mass% TeO2 was added to the starting mixtures. System was tested in two parallel mixtures, one with no added additives, and the other one with TeO2. The mechanical activation of the both mixtures was performed in a high-energy ball mill in time intervals from 0 to 40 min with ball to powder mass ratio 1:40. The particle size analysis (PSA) was employed in order to determine the changes in the particle size of the mechanically treated powders. The phase composition of the starting powders as well as microstructures was analyzed by the means of X-ray diffraction method and SEM.",
publisher = "Belgrade : Materials Research Society of Serbia",
journal = "YUCOMAT 2016 : 18th Annual Conference YUCOMAT 2016 : programme and the book of abstracts; September 5-10, Herceg Novi",
title = "Influence of mechanical activation on the MgO-Al2O3-SiO2 system with TeO2",
pages = "75-75",
url = "https://hdl.handle.net/21.15107/rcub_vinar_7552"
}

Đorđević, N., Obradović, N., Filipović, S., Kosanović, D., Marković, S., Mitrić, M.,& Pavlović, V. B.. (2016). Influence of mechanical activation on the MgO-Al2O3-SiO2 system with TeO2. in YUCOMAT 2016 : 18th Annual Conference YUCOMAT 2016 : programme and the book of abstracts; September 5-10, Herceg Novi
Belgrade : Materials Research Society of Serbia., 75-75.
https://hdl.handle.net/21.15107/rcub_vinar_7552

Đorđević N, Obradović N, Filipović S, Kosanović D, Marković S, Mitrić M, Pavlović VB. Influence of mechanical activation on the MgO-Al2O3-SiO2 system with TeO2. in YUCOMAT 2016 : 18th Annual Conference YUCOMAT 2016 : programme and the book of abstracts; September 5-10, Herceg Novi. 2016;:75-75.
https://hdl.handle.net/21.15107/rcub_vinar_7552 .

Đorđević, Nataša, Obradović, Nina, Filipović, Suzana, Kosanović, Darko, Marković, Smilja, Mitrić, Miodrag, Pavlović, Vladimir B., "Influence of mechanical activation on the MgO-Al2O3-SiO2 system with TeO2" in YUCOMAT 2016 : 18th Annual Conference YUCOMAT 2016 : programme and the book of abstracts; September 5-10, Herceg Novi (2016):75-75,
https://hdl.handle.net/21.15107/rcub_vinar_7552 .

TY  - CONF
AU  - Obradović, Nina
AU  - Đorđević, Nataša
AU  - Kosanović, Darko
AU  - Filipović, Suzana
AU  - Marković, Smilja
AU  - Mitrić, Miodrag
AU  - Pavlović, Vladimir B.
PY  - 2015
UR  - http://dais.sanu.ac.rs/123456789/761
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7525
AB  - Cordierite, 2MgO•2Ah03•5Si02 (MAS), is a very attractive high-temperature ceramic material. In order to accelerate the process of sintering, 5.00 mass% Mo03 was added to the starting mixtures. The mechanical activation of the starting mixtures was performed in a high energy ball mill in time intervals from 0 to 160 minutes. In following, starting mixtures were sintered at 1300 °C for 2h. In order to determine the changes in the particle size distribution, the mechanically treated powders were characterized by a laser light-scattering particle size analyzer. The phase composition of the starting mixtures and sintered samples was analyzed by the X-ray diffraction method. Differential thermal analyses (DTA) and thermo-gravimetric (TG) analysis were used in order to determine characteristic temperatures. Kissinger's equation was employed to calculate apparent activation energies of various processes that occur within the system while heating. Based on the obtained DTA results, it was established that mechanical activation along with MoO3 additive, has influence on sintering temperature which was decreased for about 150 °C.
PB  - Ljubljana : Central and Eastern European Committee for Thermal Analysis and Calorimetry
C3  - 3rd Central and Eastern European Conference on Thermal Analysis and Calorimetry 25-28 August 2015, Ljubljana, Slovenia: Book of Abstracts
T1  - Reaction kinetics of mechanically activated cordierite based ceramics studied via DTA
SP  - 195
EP  - 195
UR  - https://hdl.handle.net/21.15107/rcub_vinar_7525
ER  - 

@conference{
author = "Obradović, Nina and Đorđević, Nataša and Kosanović, Darko and Filipović, Suzana and Marković, Smilja and Mitrić, Miodrag and Pavlović, Vladimir B.",
year = "2015",
abstract = "Cordierite, 2MgO•2Ah03•5Si02 (MAS), is a very attractive high-temperature ceramic material. In order to accelerate the process of sintering, 5.00 mass% Mo03 was added to the starting mixtures. The mechanical activation of the starting mixtures was performed in a high energy ball mill in time intervals from 0 to 160 minutes. In following, starting mixtures were sintered at 1300 °C for 2h. In order to determine the changes in the particle size distribution, the mechanically treated powders were characterized by a laser light-scattering particle size analyzer. The phase composition of the starting mixtures and sintered samples was analyzed by the X-ray diffraction method. Differential thermal analyses (DTA) and thermo-gravimetric (TG) analysis were used in order to determine characteristic temperatures. Kissinger's equation was employed to calculate apparent activation energies of various processes that occur within the system while heating. Based on the obtained DTA results, it was established that mechanical activation along with MoO3 additive, has influence on sintering temperature which was decreased for about 150 °C.",
publisher = "Ljubljana : Central and Eastern European Committee for Thermal Analysis and Calorimetry",
journal = "3rd Central and Eastern European Conference on Thermal Analysis and Calorimetry 25-28 August 2015, Ljubljana, Slovenia: Book of Abstracts",
title = "Reaction kinetics of mechanically activated cordierite based ceramics studied via DTA",
pages = "195-195",
url = "https://hdl.handle.net/21.15107/rcub_vinar_7525"
}

Obradović, N., Đorđević, N., Kosanović, D., Filipović, S., Marković, S., Mitrić, M.,& Pavlović, V. B.. (2015). Reaction kinetics of mechanically activated cordierite based ceramics studied via DTA. in 3rd Central and Eastern European Conference on Thermal Analysis and Calorimetry 25-28 August 2015, Ljubljana, Slovenia: Book of Abstracts
Ljubljana : Central and Eastern European Committee for Thermal Analysis and Calorimetry., 195-195.
https://hdl.handle.net/21.15107/rcub_vinar_7525

Obradović N, Đorđević N, Kosanović D, Filipović S, Marković S, Mitrić M, Pavlović VB. Reaction kinetics of mechanically activated cordierite based ceramics studied via DTA. in 3rd Central and Eastern European Conference on Thermal Analysis and Calorimetry 25-28 August 2015, Ljubljana, Slovenia: Book of Abstracts. 2015;:195-195.
https://hdl.handle.net/21.15107/rcub_vinar_7525 .

Obradović, Nina, Đorđević, Nataša, Kosanović, Darko, Filipović, Suzana, Marković, Smilja, Mitrić, Miodrag, Pavlović, Vladimir B., "Reaction kinetics of mechanically activated cordierite based ceramics studied via DTA" in 3rd Central and Eastern European Conference on Thermal Analysis and Calorimetry 25-28 August 2015, Ljubljana, Slovenia: Book of Abstracts (2015):195-195,
https://hdl.handle.net/21.15107/rcub_vinar_7525 .

TY  - CONF
AU  - Obradović, Nina
AU  - Đorđević, Nataša
AU  - Marković, Smilja
AU  - Marković, Marija
AU  - Mitrić, Miodrag
PY  - 2015
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7528
AB  - Fire protection coatings on steel constructions for outdoor conditions on the basis of organic solutions have been analyzed. The first layer of coating is corrosion protection, alkyd paint „PROTHERM STEEL PRIMEPOX“ manufactorer „ITALVIS PROTECT“ Italy. The second layer of coating is an expanding coat for outdoor conditions „PROTHERM STEEL (EXT)“ solvent-bazed, „AMONNFIRE“ Italy. The third layer is final colors for metal „AMOTHERM STEEL TOP PU SB“ „AMONNFIRE“ Italy. XRD, DTA/TG and FTIR methods were used for sample characterization. It was found that primary and outer layer had very good adhesion. The second layer, for fire protection possesses 2.5 mass % humidity, which resulted in decrease of adhesion. XRD and FTIR analysis showed that those materials are adequate materials for fire protection up to 1000°C. Principles of fire protection are based on chemical reaction that are taking place in the temperature range 400-700°C.
PB  - Belgrade : Serbian Ceramic Society
C3  - Advanced Ceramics and Application : 2nd Serbian Ceramic Society Conference : program and the book of abstracts; September 30 - October 1, 2013; Belgrade
T1  - Correlation between crystal structure and thermal stability of fire protection coating
SP  - 86
EP  - 86
UR  - https://hdl.handle.net/21.15107/rcub_vinar_7528
ER  - 

@conference{
author = "Obradović, Nina and Đorđević, Nataša and Marković, Smilja and Marković, Marija and Mitrić, Miodrag",
year = "2015",
abstract = "Fire protection coatings on steel constructions for outdoor conditions on the basis of organic solutions have been analyzed. The first layer of coating is corrosion protection, alkyd paint „PROTHERM STEEL PRIMEPOX“ manufactorer „ITALVIS PROTECT“ Italy. The second layer of coating is an expanding coat for outdoor conditions „PROTHERM STEEL (EXT)“ solvent-bazed, „AMONNFIRE“ Italy. The third layer is final colors for metal „AMOTHERM STEEL TOP PU SB“ „AMONNFIRE“ Italy. XRD, DTA/TG and FTIR methods were used for sample characterization. It was found that primary and outer layer had very good adhesion. The second layer, for fire protection possesses 2.5 mass % humidity, which resulted in decrease of adhesion. XRD and FTIR analysis showed that those materials are adequate materials for fire protection up to 1000°C. Principles of fire protection are based on chemical reaction that are taking place in the temperature range 400-700°C.",
publisher = "Belgrade : Serbian Ceramic Society",
journal = "Advanced Ceramics and Application : 2nd Serbian Ceramic Society Conference : program and the book of abstracts; September 30 - October 1, 2013; Belgrade",
title = "Correlation between crystal structure and thermal stability of fire protection coating",
pages = "86-86",
url = "https://hdl.handle.net/21.15107/rcub_vinar_7528"
}

Obradović, N., Đorđević, N., Marković, S., Marković, M.,& Mitrić, M.. (2015). Correlation between crystal structure and thermal stability of fire protection coating. in Advanced Ceramics and Application : 2nd Serbian Ceramic Society Conference : program and the book of abstracts; September 30 - October 1, 2013; Belgrade
Belgrade : Serbian Ceramic Society., 86-86.
https://hdl.handle.net/21.15107/rcub_vinar_7528

Obradović N, Đorđević N, Marković S, Marković M, Mitrić M. Correlation between crystal structure and thermal stability of fire protection coating. in Advanced Ceramics and Application : 2nd Serbian Ceramic Society Conference : program and the book of abstracts; September 30 - October 1, 2013; Belgrade. 2015;:86-86.
https://hdl.handle.net/21.15107/rcub_vinar_7528 .

Obradović, Nina, Đorđević, Nataša, Marković, Smilja, Marković, Marija, Mitrić, Miodrag, "Correlation between crystal structure and thermal stability of fire protection coating" in Advanced Ceramics and Application : 2nd Serbian Ceramic Society Conference : program and the book of abstracts; September 30 - October 1, 2013; Belgrade (2015):86-86,
https://hdl.handle.net/21.15107/rcub_vinar_7528 .

TY  - CONF
AU  - Đorđević, Nataša
AU  - Obradović, Nina
AU  - Kosanović, Darko
AU  - Marković, Smilja
AU  - Mitrić, Miodrag
PY  - 2014
UR  - http://dais.sanu.ac.rs/123456789/613
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7491
AB  - Cordierite, 2MgO•2Al2O3•5SiO2 (MAS), is high-temperature ceramic material. Cordierite is commonly used material because of outstanding electrical properties, low temperature expansion coefficient and low dielectric constant. In order to accelerate the process of sintering, 5.00 mass% MoO3 has been added to the starting mixtures. The mechanical activation of the starting mixtures was performed in a high energy ball mill during 0-160 minutes. All starting mixtures were sintered at 1100°C, 1200°C and 1300°C for 2h. The particle size analysis (PSA) was employed in order to determine the changes in the particle size of the mechanically treated powders. The phase composition of the starting powders was analyzed by the X-ray diffraction method. Differential thermal (DTA) and thermogravimetric (TG) analysis were used in order to determine characteristic temperatures within the system during heating. Based on the obtained DTA results, it was established that mechanical activation with additive MoO3, has influence on decreasing sintering temperatures for about 150°C.
PB  - Belgrade : Serbian Ceramic Society
C3  - Advanced Ceramics and Application : 3rd Serbian Ceramic Society Conference : program and the book of abstracts; September 29 - October 1, 2014; Belgrade
T1  - Influence of Mechanical Activation on the Constituents of the MgO-Al2O3-SiO2-MoO3 System
SP  - 119
EP  - 119
UR  - https://hdl.handle.net/21.15107/rcub_vinar_7491
ER  - 

@conference{
author = "Đorđević, Nataša and Obradović, Nina and Kosanović, Darko and Marković, Smilja and Mitrić, Miodrag",
year = "2014",
abstract = "Cordierite, 2MgO•2Al2O3•5SiO2 (MAS), is high-temperature ceramic material. Cordierite is commonly used material because of outstanding electrical properties, low temperature expansion coefficient and low dielectric constant. In order to accelerate the process of sintering, 5.00 mass% MoO3 has been added to the starting mixtures. The mechanical activation of the starting mixtures was performed in a high energy ball mill during 0-160 minutes. All starting mixtures were sintered at 1100°C, 1200°C and 1300°C for 2h. The particle size analysis (PSA) was employed in order to determine the changes in the particle size of the mechanically treated powders. The phase composition of the starting powders was analyzed by the X-ray diffraction method. Differential thermal (DTA) and thermogravimetric (TG) analysis were used in order to determine characteristic temperatures within the system during heating. Based on the obtained DTA results, it was established that mechanical activation with additive MoO3, has influence on decreasing sintering temperatures for about 150°C.",
publisher = "Belgrade : Serbian Ceramic Society",
journal = "Advanced Ceramics and Application : 3rd Serbian Ceramic Society Conference : program and the book of abstracts; September 29 - October 1, 2014; Belgrade",
title = "Influence of Mechanical Activation on the Constituents of the MgO-Al2O3-SiO2-MoO3 System",
pages = "119-119",
url = "https://hdl.handle.net/21.15107/rcub_vinar_7491"
}

Đorđević, N., Obradović, N., Kosanović, D., Marković, S.,& Mitrić, M.. (2014). Influence of Mechanical Activation on the Constituents of the MgO-Al2O3-SiO2-MoO3 System. in Advanced Ceramics and Application : 3rd Serbian Ceramic Society Conference : program and the book of abstracts; September 29 - October 1, 2014; Belgrade
Belgrade : Serbian Ceramic Society., 119-119.
https://hdl.handle.net/21.15107/rcub_vinar_7491

Đorđević N, Obradović N, Kosanović D, Marković S, Mitrić M. Influence of Mechanical Activation on the Constituents of the MgO-Al2O3-SiO2-MoO3 System. in Advanced Ceramics and Application : 3rd Serbian Ceramic Society Conference : program and the book of abstracts; September 29 - October 1, 2014; Belgrade. 2014;:119-119.
https://hdl.handle.net/21.15107/rcub_vinar_7491 .

Đorđević, Nataša, Obradović, Nina, Kosanović, Darko, Marković, Smilja, Mitrić, Miodrag, "Influence of Mechanical Activation on the Constituents of the MgO-Al2O3-SiO2-MoO3 System" in Advanced Ceramics and Application : 3rd Serbian Ceramic Society Conference : program and the book of abstracts; September 29 - October 1, 2014; Belgrade (2014):119-119,
https://hdl.handle.net/21.15107/rcub_vinar_7491 .

TY  - CONF
AU  - Đorđević, Nataša
AU  - Obradović, Nina
AU  - Kosanović, Darko
AU  - Mitrić, Miodrag
AU  - Pavlović, Vladimir B.
PY  - 2014
UR  - http://dais.sanu.ac.rs/123456789/766
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7529
AB  - Cordierite (MAS) is difficult to sinter because of the very narrow sintering temperature range (1300-1400ºC). Because a low temperature process is desirable, it is necessary to find functional ads which can allow easier sintering process at lower temperature. The influence of MoO3 on the preparation process of cordierite ceramics was investigated. 2MgO-2Al2O3-5SiO2 was researched by sintering followed binary systems: MgO/MoO3, Al2O3/MoO3 and SiO2/MoO3 (all sintered at 850ºC and 1100ºC, sintering time 2h). Composition of these systems was 80% of oxide and 20% MoO3. The effects of sintering, the composition and morphology were followed by X-ray diffraction, SEM microscopy and EDS analysis. It has been found that MoO3, beside liquid phase, forms intermediary unstable compounds with MgO and Al2O3, which is the significance information for further research. MAS ceramics were sintered with 20% MoO3 at 1100ºC, 1200ºC and 1300ºC, during 2h.
PB  - Belgrade : Materials Research Society of Serbia
C3  - The Sixteenth Annual Conference YUCOMAT 2014: Programme and the Book of Abstracts
T1  - Sintering of cordierite in the presence of MoO3 and crystallization analysis
SP  - 68
EP  - 68
UR  - https://hdl.handle.net/21.15107/rcub_vinar_7529
ER  - 

@conference{
author = "Đorđević, Nataša and Obradović, Nina and Kosanović, Darko and Mitrić, Miodrag and Pavlović, Vladimir B.",
year = "2014",
abstract = "Cordierite (MAS) is difficult to sinter because of the very narrow sintering temperature range (1300-1400ºC). Because a low temperature process is desirable, it is necessary to find functional ads which can allow easier sintering process at lower temperature. The influence of MoO3 on the preparation process of cordierite ceramics was investigated. 2MgO-2Al2O3-5SiO2 was researched by sintering followed binary systems: MgO/MoO3, Al2O3/MoO3 and SiO2/MoO3 (all sintered at 850ºC and 1100ºC, sintering time 2h). Composition of these systems was 80% of oxide and 20% MoO3. The effects of sintering, the composition and morphology were followed by X-ray diffraction, SEM microscopy and EDS analysis. It has been found that MoO3, beside liquid phase, forms intermediary unstable compounds with MgO and Al2O3, which is the significance information for further research. MAS ceramics were sintered with 20% MoO3 at 1100ºC, 1200ºC and 1300ºC, during 2h.",
publisher = "Belgrade : Materials Research Society of Serbia",
journal = "The Sixteenth Annual Conference YUCOMAT 2014: Programme and the Book of Abstracts",
title = "Sintering of cordierite in the presence of MoO3 and crystallization analysis",
pages = "68-68",
url = "https://hdl.handle.net/21.15107/rcub_vinar_7529"
}

Đorđević, N., Obradović, N., Kosanović, D., Mitrić, M.,& Pavlović, V. B.. (2014). Sintering of cordierite in the presence of MoO3 and crystallization analysis. in The Sixteenth Annual Conference YUCOMAT 2014: Programme and the Book of Abstracts
Belgrade : Materials Research Society of Serbia., 68-68.
https://hdl.handle.net/21.15107/rcub_vinar_7529

Đorđević N, Obradović N, Kosanović D, Mitrić M, Pavlović VB. Sintering of cordierite in the presence of MoO3 and crystallization analysis. in The Sixteenth Annual Conference YUCOMAT 2014: Programme and the Book of Abstracts. 2014;:68-68.
https://hdl.handle.net/21.15107/rcub_vinar_7529 .

Đorđević, Nataša, Obradović, Nina, Kosanović, Darko, Mitrić, Miodrag, Pavlović, Vladimir B., "Sintering of cordierite in the presence of MoO3 and crystallization analysis" in The Sixteenth Annual Conference YUCOMAT 2014: Programme and the Book of Abstracts (2014):68-68,
https://hdl.handle.net/21.15107/rcub_vinar_7529 .

TY  - CONF
AU  - Obradović, Nina
AU  - Đorđević, Nataša
AU  - Labus, Nebojša
AU  - Peleš, Adriana
AU  - Mitrić, Miodrag
AU  - Pavlović, Vladimir B.
PY  - 2013
UR  - http://dais.sanu.ac.rs/123456789/416
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7427
AB  - Mechanical activation is widely used and relatively inexpensive procedure for sintering process sample preparation. However, the influence of pressure, which is used for compaction, has not been completely investigated. Cordierite, 2MgO⋅2Al2O3⋅5SiO2, is a very actual hightemperature ceramic material, due to its characteristics. Based on our previous investigation, the mechanical activation of the starting mixtures with 5.00 mass% TiO2 was performed in a high energy ball mill during 10 minutes. Compaction pressure varied from 0.5 to 6t/cm2 (49 MPa - 588 MPa). Sintering process was performed at 1350oC for 4h in air atmosphere. The phase composition of activated and sintered samples was analyzed by the X-ray diffraction method. Scanning electron microscopy was performed to analyze the microstructure of both compacted and sintered sample. Non-isothermal sintering up to 1400oC, with a constant heating rate, was investigated by thermal shrinkage change with dilatometer. In this paper we research green bodies and sintered samples compaction pressure influence electrical properties.
PB  - Belgrade : Serbian Ceramic Society
C3  - Advanced Ceramics and Application : 2nd Serbian Ceramic Society Conference : program and the book of abstracts; September 30 - October 1, 2013; Belgrade
T1  - Density and electrical properties of cordierite based ceramics as function of compaction pressure
SP  - 39
EP  - 39
UR  - https://hdl.handle.net/21.15107/rcub_vinar_7427
ER  - 

@conference{
author = "Obradović, Nina and Đorđević, Nataša and Labus, Nebojša and Peleš, Adriana and Mitrić, Miodrag and Pavlović, Vladimir B.",
year = "2013",
abstract = "Mechanical activation is widely used and relatively inexpensive procedure for sintering process sample preparation. However, the influence of pressure, which is used for compaction, has not been completely investigated. Cordierite, 2MgO⋅2Al2O3⋅5SiO2, is a very actual hightemperature ceramic material, due to its characteristics. Based on our previous investigation, the mechanical activation of the starting mixtures with 5.00 mass% TiO2 was performed in a high energy ball mill during 10 minutes. Compaction pressure varied from 0.5 to 6t/cm2 (49 MPa - 588 MPa). Sintering process was performed at 1350oC for 4h in air atmosphere. The phase composition of activated and sintered samples was analyzed by the X-ray diffraction method. Scanning electron microscopy was performed to analyze the microstructure of both compacted and sintered sample. Non-isothermal sintering up to 1400oC, with a constant heating rate, was investigated by thermal shrinkage change with dilatometer. In this paper we research green bodies and sintered samples compaction pressure influence electrical properties.",
publisher = "Belgrade : Serbian Ceramic Society",
journal = "Advanced Ceramics and Application : 2nd Serbian Ceramic Society Conference : program and the book of abstracts; September 30 - October 1, 2013; Belgrade",
title = "Density and electrical properties of cordierite based ceramics as function of compaction pressure",
pages = "39-39",
url = "https://hdl.handle.net/21.15107/rcub_vinar_7427"
}

Obradović, N., Đorđević, N., Labus, N., Peleš, A., Mitrić, M.,& Pavlović, V. B.. (2013). Density and electrical properties of cordierite based ceramics as function of compaction pressure. in Advanced Ceramics and Application : 2nd Serbian Ceramic Society Conference : program and the book of abstracts; September 30 - October 1, 2013; Belgrade
Belgrade : Serbian Ceramic Society., 39-39.
https://hdl.handle.net/21.15107/rcub_vinar_7427

Obradović N, Đorđević N, Labus N, Peleš A, Mitrić M, Pavlović VB. Density and electrical properties of cordierite based ceramics as function of compaction pressure. in Advanced Ceramics and Application : 2nd Serbian Ceramic Society Conference : program and the book of abstracts; September 30 - October 1, 2013; Belgrade. 2013;:39-39.
https://hdl.handle.net/21.15107/rcub_vinar_7427 .

Obradović, Nina, Đorđević, Nataša, Labus, Nebojša, Peleš, Adriana, Mitrić, Miodrag, Pavlović, Vladimir B., "Density and electrical properties of cordierite based ceramics as function of compaction pressure" in Advanced Ceramics and Application : 2nd Serbian Ceramic Society Conference : program and the book of abstracts; September 30 - October 1, 2013; Belgrade (2013):39-39,
https://hdl.handle.net/21.15107/rcub_vinar_7427 .

TY  - CONF
AU  - Đorđević, Nataša
AU  - Obradović, Nina
AU  - Radosavljević-Mihajlović, Ana S.
AU  - Jokić, Bojan M.
AU  - Filipović, Suzana
AU  - Mitrić, Miodrag
AU  - Marković, Smilja
PY  - 2013
UR  - http://dais.sanu.ac.rs/123456789/417
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7428
AB  - Cordierite, 2MgO⋅2Al2O3⋅5SiO2, is a very attractive high-temperature ceramic material, due to its outstanding electrical characteristics, such as the low temperature expansion coefficient, low dielectric constant and good mechanical properties. In order to accelerate the process of sintering, 5.00 mass% MoO3 has been added to the starting mixtures. The mechanical activation of the starting mixtures was performed in a high energy ball mill during 0-80 minutes. The particle size analysis (PSA) was employed in order to determine the changes in the particle size of the mechanically treated powders. The phase composition of the starting powders and sintered samples was analyzed by the X-ray diffraction method. Furthermore, differential thermal analysis (DTA) was used in order to determine characteristic temperatures within the system during heating. Based on the obtained DTA results, it was established that mechanical activation has some influence on temperatures of phase transitions. Sintering process was performed in air at 1200oC for 2h.
PB  - Belgrade : Serbian Ceramic Society
C3  - Advanced Ceramics and Application : 2nd Serbian Ceramic Society Conference : program and the book of abstracts; September 30 - October 1, 2013; Belgrade
T1  - Influence of MoO3 on sintering temperature of mechanically activated MgO-Al2O3-SiO2 system
SP  - 40
EP  - 40
UR  - https://hdl.handle.net/21.15107/rcub_vinar_7428
ER  - 

@conference{
author = "Đorđević, Nataša and Obradović, Nina and Radosavljević-Mihajlović, Ana S. and Jokić, Bojan M. and Filipović, Suzana and Mitrić, Miodrag and Marković, Smilja",
year = "2013",
abstract = "Cordierite, 2MgO⋅2Al2O3⋅5SiO2, is a very attractive high-temperature ceramic material, due to its outstanding electrical characteristics, such as the low temperature expansion coefficient, low dielectric constant and good mechanical properties. In order to accelerate the process of sintering, 5.00 mass% MoO3 has been added to the starting mixtures. The mechanical activation of the starting mixtures was performed in a high energy ball mill during 0-80 minutes. The particle size analysis (PSA) was employed in order to determine the changes in the particle size of the mechanically treated powders. The phase composition of the starting powders and sintered samples was analyzed by the X-ray diffraction method. Furthermore, differential thermal analysis (DTA) was used in order to determine characteristic temperatures within the system during heating. Based on the obtained DTA results, it was established that mechanical activation has some influence on temperatures of phase transitions. Sintering process was performed in air at 1200oC for 2h.",
publisher = "Belgrade : Serbian Ceramic Society",
journal = "Advanced Ceramics and Application : 2nd Serbian Ceramic Society Conference : program and the book of abstracts; September 30 - October 1, 2013; Belgrade",
title = "Influence of MoO3 on sintering temperature of mechanically activated MgO-Al2O3-SiO2 system",
pages = "40-40",
url = "https://hdl.handle.net/21.15107/rcub_vinar_7428"
}

Đorđević, N., Obradović, N., Radosavljević-Mihajlović, A. S., Jokić, B. M., Filipović, S., Mitrić, M.,& Marković, S.. (2013). Influence of MoO3 on sintering temperature of mechanically activated MgO-Al2O3-SiO2 system. in Advanced Ceramics and Application : 2nd Serbian Ceramic Society Conference : program and the book of abstracts; September 30 - October 1, 2013; Belgrade
Belgrade : Serbian Ceramic Society., 40-40.
https://hdl.handle.net/21.15107/rcub_vinar_7428

Đorđević N, Obradović N, Radosavljević-Mihajlović AS, Jokić BM, Filipović S, Mitrić M, Marković S. Influence of MoO3 on sintering temperature of mechanically activated MgO-Al2O3-SiO2 system. in Advanced Ceramics and Application : 2nd Serbian Ceramic Society Conference : program and the book of abstracts; September 30 - October 1, 2013; Belgrade. 2013;:40-40.
https://hdl.handle.net/21.15107/rcub_vinar_7428 .

Đorđević, Nataša, Obradović, Nina, Radosavljević-Mihajlović, Ana S., Jokić, Bojan M., Filipović, Suzana, Mitrić, Miodrag, Marković, Smilja, "Influence of MoO3 on sintering temperature of mechanically activated MgO-Al2O3-SiO2 system" in Advanced Ceramics and Application : 2nd Serbian Ceramic Society Conference : program and the book of abstracts; September 30 - October 1, 2013; Belgrade (2013):40-40,
https://hdl.handle.net/21.15107/rcub_vinar_7428 .

TY  - JOUR
AU  - Đorđević, Nataša
AU  - Obradović, Nina
AU  - Filipović, Suzana
AU  - Živojinović, Jelena
AU  - Mitrić, Miodrag
AU  - Marković, Smilja
PY  - 2012
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7446
AB  - U ovom radu je ispitivan uticaj mehaničke energije na strukturu i promene u mikrostrukturi sistema MgO-Al2O3-SiO2-TiO2. Utvrđeno je da mehanička energija pospešuje homogenizaciju polaznih komponenti, utiče na veličinu i oblik zrna praškastih materijala i podstiče promene u kristalnoj strukturi polaznih čestica, sto utiče na pojavu defekata u ispitivanom sistemu. Ove promene su utvrđene difraktometrijskom analizom, kao i PSA i DTA metodom.
AB  - In this paper the effects of mechanical activation on structural and microstructural changes of the system MgO-Al2O3-SiO2-TiO2 were analyzed. It was confirmed that mechanical activation led to the homogenization of powder particles, the comminuting of particles, and after this period, the introduced energy was used to induce changes in the crystal structure, which resulted in the emergence of defects, initially on the surface of the crystal lattice, and then inside.
PB  - Beograd : Savez inženjera i tehničara Srbije
T2  - Tehnika - Novi materijali
T1  - Uticaj mehaničke energije na komponente MgO-Al2O3-SiO2-TiO2 sistema
SP  - 329
EP  - 333
UR  - https://hdl.handle.net/21.15107/rcub_vinar_7446
ER  - 

@article{
author = "Đorđević, Nataša and Obradović, Nina and Filipović, Suzana and Živojinović, Jelena and Mitrić, Miodrag and Marković, Smilja",
year = "2012",
abstract = "U ovom radu je ispitivan uticaj mehaničke energije na strukturu i promene u mikrostrukturi sistema MgO-Al2O3-SiO2-TiO2. Utvrđeno je da mehanička energija pospešuje homogenizaciju polaznih komponenti, utiče na veličinu i oblik zrna praškastih materijala i podstiče promene u kristalnoj strukturi polaznih čestica, sto utiče na pojavu defekata u ispitivanom sistemu. Ove promene su utvrđene difraktometrijskom analizom, kao i PSA i DTA metodom., In this paper the effects of mechanical activation on structural and microstructural changes of the system MgO-Al2O3-SiO2-TiO2 were analyzed. It was confirmed that mechanical activation led to the homogenization of powder particles, the comminuting of particles, and after this period, the introduced energy was used to induce changes in the crystal structure, which resulted in the emergence of defects, initially on the surface of the crystal lattice, and then inside.",
publisher = "Beograd : Savez inženjera i tehničara Srbije",
journal = "Tehnika - Novi materijali",
title = "Uticaj mehaničke energije na komponente MgO-Al2O3-SiO2-TiO2 sistema",
pages = "329-333",
url = "https://hdl.handle.net/21.15107/rcub_vinar_7446"
}

Đorđević, N., Obradović, N., Filipović, S., Živojinović, J., Mitrić, M.,& Marković, S.. (2012). Uticaj mehaničke energije na komponente MgO-Al2O3-SiO2-TiO2 sistema. in Tehnika - Novi materijali
Beograd : Savez inženjera i tehničara Srbije., 329-333.
https://hdl.handle.net/21.15107/rcub_vinar_7446

Đorđević N, Obradović N, Filipović S, Živojinović J, Mitrić M, Marković S. Uticaj mehaničke energije na komponente MgO-Al2O3-SiO2-TiO2 sistema. in Tehnika - Novi materijali. 2012;:329-333.
https://hdl.handle.net/21.15107/rcub_vinar_7446 .

Đorđević, Nataša, Obradović, Nina, Filipović, Suzana, Živojinović, Jelena, Mitrić, Miodrag, Marković, Smilja, "Uticaj mehaničke energije na komponente MgO-Al2O3-SiO2-TiO2 sistema" in Tehnika - Novi materijali (2012):329-333,
https://hdl.handle.net/21.15107/rcub_vinar_7446 .

TY  - CONF
AU  - Đorđević, Nataša
AU  - Obradović, Nina
AU  - Filipović, Suzana
AU  - Kosanović, Darko
AU  - Mitrić, Miodrag
AU  - Marković, Smilja
AU  - Pavlović, Vladimir B.
PY  - 2011
UR  - http://dais.sanu.ac.rs/123456789/628
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7496
AB  - According to its exceptional electrical characteristics, such as low temperature expansion coefficient, low dielectric constant and good mechanical properties, cordierite, 2MgO⋅2Al2O3⋅5SiO2, represents very attractive ceramic material in the field of high temperatures. In order to accelerate the process of sintering, 1 mass% Bi2O3 has been added to starting mixtures. Liquid phase sintering caused by presence of bismuth-oxide leads to lowering temperature of cordierite formation. Mechanical activation of starting mixtures (0-56 minutes in vibro-mill) additionally leads to lowering sintering temperatures. Process of sintering was performed at 1200, 1300 and 1400 oC, for 2h. BET and PSA were employed in order to follow the changes in specific surface area and particle size of mechanically treated powders. Phase composition of starting powders and sintered materials was analyzed by X-ray diffraction method. Moreover, SEM analysis was used for analysis of powders morphology and sintered pallets microstructure.
PB  - Belgrade : Materials Research Society of Serbia
C3  - VII International Conference on Mechanochemistry and Mechanical Alloying INCOME 2011: Programme and the Book of Abstracts
T1  - Influence of mechanochemical activation on sintering of cordierite ceramics with the presence of Bi2O3 as a functional additive
SP  - 84
EP  - 84
UR  - https://hdl.handle.net/21.15107/rcub_vinar_7496
ER  - 

@conference{
author = "Đorđević, Nataša and Obradović, Nina and Filipović, Suzana and Kosanović, Darko and Mitrić, Miodrag and Marković, Smilja and Pavlović, Vladimir B.",
year = "2011",
abstract = "According to its exceptional electrical characteristics, such as low temperature expansion coefficient, low dielectric constant and good mechanical properties, cordierite, 2MgO⋅2Al2O3⋅5SiO2, represents very attractive ceramic material in the field of high temperatures. In order to accelerate the process of sintering, 1 mass% Bi2O3 has been added to starting mixtures. Liquid phase sintering caused by presence of bismuth-oxide leads to lowering temperature of cordierite formation. Mechanical activation of starting mixtures (0-56 minutes in vibro-mill) additionally leads to lowering sintering temperatures. Process of sintering was performed at 1200, 1300 and 1400 oC, for 2h. BET and PSA were employed in order to follow the changes in specific surface area and particle size of mechanically treated powders. Phase composition of starting powders and sintered materials was analyzed by X-ray diffraction method. Moreover, SEM analysis was used for analysis of powders morphology and sintered pallets microstructure.",
publisher = "Belgrade : Materials Research Society of Serbia",
journal = "VII International Conference on Mechanochemistry and Mechanical Alloying INCOME 2011: Programme and the Book of Abstracts",
title = "Influence of mechanochemical activation on sintering of cordierite ceramics with the presence of Bi2O3 as a functional additive",
pages = "84-84",
url = "https://hdl.handle.net/21.15107/rcub_vinar_7496"
}

Đorđević, N., Obradović, N., Filipović, S., Kosanović, D., Mitrić, M., Marković, S.,& Pavlović, V. B.. (2011). Influence of mechanochemical activation on sintering of cordierite ceramics with the presence of Bi2O3 as a functional additive. in VII International Conference on Mechanochemistry and Mechanical Alloying INCOME 2011: Programme and the Book of Abstracts
Belgrade : Materials Research Society of Serbia., 84-84.
https://hdl.handle.net/21.15107/rcub_vinar_7496

Đorđević N, Obradović N, Filipović S, Kosanović D, Mitrić M, Marković S, Pavlović VB. Influence of mechanochemical activation on sintering of cordierite ceramics with the presence of Bi2O3 as a functional additive. in VII International Conference on Mechanochemistry and Mechanical Alloying INCOME 2011: Programme and the Book of Abstracts. 2011;:84-84.
https://hdl.handle.net/21.15107/rcub_vinar_7496 .

Đorđević, Nataša, Obradović, Nina, Filipović, Suzana, Kosanović, Darko, Mitrić, Miodrag, Marković, Smilja, Pavlović, Vladimir B., "Influence of mechanochemical activation on sintering of cordierite ceramics with the presence of Bi2O3 as a functional additive" in VII International Conference on Mechanochemistry and Mechanical Alloying INCOME 2011: Programme and the Book of Abstracts (2011):84-84,
https://hdl.handle.net/21.15107/rcub_vinar_7496 .