Filipović, Suzana

Link to this page

Authority KeyName Variants
orcid::0000-0001-6383-8327
  • Filipović, Suzana (12)

Author's Bibliography

The influence of high compaction pressure on cordierite-based ceramics

Đorđević, Nataša; Mihajlović, Slavica; Obradović, Nina; Peleš, Adrijana; Filipović, Suzana

(Bor : University of Belgrade, Technical Faculty in Bor, 2021)

TY  - CONF
AU  - Đorđević, Nataša
AU  - Mihajlović, Slavica
AU  - Obradović, Nina
AU  - Peleš, Adrijana
AU  - Filipović, Suzana
PY  - 2021
UR  - https://ritnms.itnms.ac.rs/handle/123456789/1133
AB  - Cordierite, 2MgO⋅2Al2O3⋅5SiO2 is a high-temperature ceramic material. In order to improve its properties, titanium oxide was added to the starting mixture in an amount of 5%. Mechanical activation of samples was performed in a high-energy ball mill for 10 minutes. The compaction pressure was unusually high, 6 t cm-2 (588 MPa) in order to compare to previous research. Cordierite was sintered at the temperature of 1375°C. The phase composition of the activated and sintered samples was analyzed using X-ray diffraction. Scanning electron microscopy was used to analyze the microstructure of both compacted and sintered samples.
PB  - Bor : University of Belgrade, Technical Faculty in Bor
C3  - 52nd International October Conference on Mining and Metallurgy, (IOC 2021)
T1  - The influence of high compaction pressure on cordierite-based ceramics
EP  - 148
SP  - 145
ER  - 
@conference{
author = "Đorđević, Nataša and Mihajlović, Slavica and Obradović, Nina and Peleš, Adrijana and Filipović, Suzana",
year = "2021",
abstract = "Cordierite, 2MgO⋅2Al2O3⋅5SiO2 is a high-temperature ceramic material. In order to improve its properties, titanium oxide was added to the starting mixture in an amount of 5%. Mechanical activation of samples was performed in a high-energy ball mill for 10 minutes. The compaction pressure was unusually high, 6 t cm-2 (588 MPa) in order to compare to previous research. Cordierite was sintered at the temperature of 1375°C. The phase composition of the activated and sintered samples was analyzed using X-ray diffraction. Scanning electron microscopy was used to analyze the microstructure of both compacted and sintered samples.",
publisher = "Bor : University of Belgrade, Technical Faculty in Bor",
journal = "52nd International October Conference on Mining and Metallurgy, (IOC 2021)",
title = "The influence of high compaction pressure on cordierite-based ceramics",
pages = "148-145"
}
Đorđević, N., Mihajlović, S., Obradović, N., Peleš, A.,& Filipović, S.. (2021). The influence of high compaction pressure on cordierite-based ceramics. in 52nd International October Conference on Mining and Metallurgy, (IOC 2021)
Bor : University of Belgrade, Technical Faculty in Bor., 145-148.
Đorđević N, Mihajlović S, Obradović N, Peleš A, Filipović S. The influence of high compaction pressure on cordierite-based ceramics. in 52nd International October Conference on Mining and Metallurgy, (IOC 2021). 2021;:145-148..
Đorđević, Nataša, Mihajlović, Slavica, Obradović, Nina, Peleš, Adrijana, Filipović, Suzana, "The influence of high compaction pressure on cordierite-based ceramics" in 52nd International October Conference on Mining and Metallurgy, (IOC 2021) (2021):145-148.

Kinetics of thermally activated processes in cordierite-based ceramics

Obradović, Nina; Blagojević, Vladimir; Filipović, Suzana; Đorđević, Nataša; Kosanović, Darko; Marković, Smilja; Kachlik, Martin; Maca, Karel; Pavlović, Vladimir

(Springer, Dordrecht, 2019)

TY  - JOUR
AU  - Obradović, Nina
AU  - Blagojević, Vladimir
AU  - Filipović, Suzana
AU  - Đorđević, Nataša
AU  - Kosanović, Darko
AU  - Marković, Smilja
AU  - Kachlik, Martin
AU  - Maca, Karel
AU  - Pavlović, Vladimir
PY  - 2019
UR  - https://ritnms.itnms.ac.rs/handle/123456789/501
AB  - Thermally activated processes in cordierite-based ceramics were investigated to determine the effect of the mechanical activation and the addition of TeO2 on kinetic and thermodynamic parameters of these processes. Using a combination of dilatometry and DTA measurements in the 100-1400 degrees C temperature range, it was established that both the mechanical activation and the addition of TeO2 have a significant effect on processes in cordierite-based ceramics. A combination of 5 mass% addition of TeO2 and mechanical activation for 40 min reduced the sintering temperature of cordierite ceramics to around 1100 degrees C. In addition, the analysis of DTA measurements of mechanically activated samples indicates that the mechanical activation leads to intensification of the cordierite formation through an increase in concentration of surface defects and an increase in grain contact surface in the initial powder.
PB  - Springer, Dordrecht
T2  - Journal of Thermal Analysis and Calorimetry
T1  - Kinetics of thermally activated processes in cordierite-based ceramics
EP  - 2998
IS  - 5
SP  - 2989
VL  - 138
DO  - 10.1007/s10973-018-7924-1
UR  - https://hdl.handle.net/21.15107/rcub_dais_7048
UR  - conv_867
ER  - 
@article{
author = "Obradović, Nina and Blagojević, Vladimir and Filipović, Suzana and Đorđević, Nataša and Kosanović, Darko and Marković, Smilja and Kachlik, Martin and Maca, Karel and Pavlović, Vladimir",
year = "2019",
abstract = "Thermally activated processes in cordierite-based ceramics were investigated to determine the effect of the mechanical activation and the addition of TeO2 on kinetic and thermodynamic parameters of these processes. Using a combination of dilatometry and DTA measurements in the 100-1400 degrees C temperature range, it was established that both the mechanical activation and the addition of TeO2 have a significant effect on processes in cordierite-based ceramics. A combination of 5 mass% addition of TeO2 and mechanical activation for 40 min reduced the sintering temperature of cordierite ceramics to around 1100 degrees C. In addition, the analysis of DTA measurements of mechanically activated samples indicates that the mechanical activation leads to intensification of the cordierite formation through an increase in concentration of surface defects and an increase in grain contact surface in the initial powder.",
publisher = "Springer, Dordrecht",
journal = "Journal of Thermal Analysis and Calorimetry",
title = "Kinetics of thermally activated processes in cordierite-based ceramics",
pages = "2998-2989",
number = "5",
volume = "138",
doi = "10.1007/s10973-018-7924-1",
url = "https://hdl.handle.net/21.15107/rcub_dais_7048, conv_867"
}
Obradović, N., Blagojević, V., Filipović, S., Đorđević, N., Kosanović, D., Marković, S., Kachlik, M., Maca, K.,& Pavlović, V.. (2019). Kinetics of thermally activated processes in cordierite-based ceramics. in Journal of Thermal Analysis and Calorimetry
Springer, Dordrecht., 138(5), 2989-2998.
https://doi.org/10.1007/s10973-018-7924-1
https://hdl.handle.net/21.15107/rcub_dais_7048
Obradović N, Blagojević V, Filipović S, Đorđević N, Kosanović D, Marković S, Kachlik M, Maca K, Pavlović V. Kinetics of thermally activated processes in cordierite-based ceramics. in Journal of Thermal Analysis and Calorimetry. 2019;138(5):2989-2998.
doi:10.1007/s10973-018-7924-1
https://hdl.handle.net/21.15107/rcub_dais_7048 .
Obradović, Nina, Blagojević, Vladimir, Filipović, Suzana, Đorđević, Nataša, Kosanović, Darko, Marković, Smilja, Kachlik, Martin, Maca, Karel, Pavlović, Vladimir, "Kinetics of thermally activated processes in cordierite-based ceramics" in Journal of Thermal Analysis and Calorimetry, 138, no. 5 (2019):2989-2998,
https://doi.org/10.1007/s10973-018-7924-1 .,
https://hdl.handle.net/21.15107/rcub_dais_7048 .
7
1
4

Reaction kinetics of mechanically activated cordierite-based ceramics studied via DTA

Obradović, Nina; Đorđević, Nataša; Filipović, Suzana; Marković, Smilja; Kosanović, Darko; Mitrić, Miodrag; Pavlović, Vladimir

(Springer, Dordrecht, 2016)

TY  - JOUR
AU  - Obradović, Nina
AU  - Đorđević, Nataša
AU  - Filipović, Suzana
AU  - Marković, Smilja
AU  - Kosanović, Darko
AU  - Mitrić, Miodrag
AU  - Pavlović, Vladimir
PY  - 2016
UR  - https://ritnms.itnms.ac.rs/handle/123456789/410
AB  - Since cordierite, 2MgO center dot 2Al(2)O(3)center dot 5SiO(2) (MAS), is a very useful high-temperature ceramic material, it is important to decrease its sintering temperature. In order to accelerate the process of sintering, 5.00 mass% MoO3 was added to the starting mixtures. The mechanical activation of the starting mixtures was performed in a high-energy ball mill in time intervals from 0 to 160 min. After the activation, starting mixtures were sintered at 1300 A degrees C for 2 h. In order to determine the impact of mechanical activation on particle size distribution and powders morphology, the mechanically treated powders were characterized by a laser light-scattering particle size analyzer and scanning electron microscopy. The phase composition of the starting mixtures and sintered samples was analyzed by the X-ray diffraction method. In order to determine temperature intervals of chemical reactions and phase transitions, differential thermal analyses (DTA) and thermo-gravimetric analysis were used. Kissinger's equation was employed to calculate apparent activation energies of various processes that occur within the system during heating. Based on the obtained DTA results, it was established that mechanical activation along with MoO3 additive has influence on sintering temperature which was decreased for more than 100 A degrees C, comparing to the literature data.
PB  - Springer, Dordrecht
T2  - Journal of Thermal Analysis and Calorimetry
T1  - Reaction kinetics of mechanically activated cordierite-based ceramics studied via DTA
EP  - 673
IS  - 2
SP  - 667
VL  - 124
DO  - 10.1007/s10973-015-5132-9
UR  - conv_757
ER  - 
@article{
author = "Obradović, Nina and Đorđević, Nataša and Filipović, Suzana and Marković, Smilja and Kosanović, Darko and Mitrić, Miodrag and Pavlović, Vladimir",
year = "2016",
abstract = "Since cordierite, 2MgO center dot 2Al(2)O(3)center dot 5SiO(2) (MAS), is a very useful high-temperature ceramic material, it is important to decrease its sintering temperature. In order to accelerate the process of sintering, 5.00 mass% MoO3 was added to the starting mixtures. The mechanical activation of the starting mixtures was performed in a high-energy ball mill in time intervals from 0 to 160 min. After the activation, starting mixtures were sintered at 1300 A degrees C for 2 h. In order to determine the impact of mechanical activation on particle size distribution and powders morphology, the mechanically treated powders were characterized by a laser light-scattering particle size analyzer and scanning electron microscopy. The phase composition of the starting mixtures and sintered samples was analyzed by the X-ray diffraction method. In order to determine temperature intervals of chemical reactions and phase transitions, differential thermal analyses (DTA) and thermo-gravimetric analysis were used. Kissinger's equation was employed to calculate apparent activation energies of various processes that occur within the system during heating. Based on the obtained DTA results, it was established that mechanical activation along with MoO3 additive has influence on sintering temperature which was decreased for more than 100 A degrees C, comparing to the literature data.",
publisher = "Springer, Dordrecht",
journal = "Journal of Thermal Analysis and Calorimetry",
title = "Reaction kinetics of mechanically activated cordierite-based ceramics studied via DTA",
pages = "673-667",
number = "2",
volume = "124",
doi = "10.1007/s10973-015-5132-9",
url = "conv_757"
}
Obradović, N., Đorđević, N., Filipović, S., Marković, S., Kosanović, D., Mitrić, M.,& Pavlović, V.. (2016). Reaction kinetics of mechanically activated cordierite-based ceramics studied via DTA. in Journal of Thermal Analysis and Calorimetry
Springer, Dordrecht., 124(2), 667-673.
https://doi.org/10.1007/s10973-015-5132-9
conv_757
Obradović N, Đorđević N, Filipović S, Marković S, Kosanović D, Mitrić M, Pavlović V. Reaction kinetics of mechanically activated cordierite-based ceramics studied via DTA. in Journal of Thermal Analysis and Calorimetry. 2016;124(2):667-673.
doi:10.1007/s10973-015-5132-9
conv_757 .
Obradović, Nina, Đorđević, Nataša, Filipović, Suzana, Marković, Smilja, Kosanović, Darko, Mitrić, Miodrag, Pavlović, Vladimir, "Reaction kinetics of mechanically activated cordierite-based ceramics studied via DTA" in Journal of Thermal Analysis and Calorimetry, 124, no. 2 (2016):667-673,
https://doi.org/10.1007/s10973-015-5132-9 .,
conv_757 .
7
8
9

Microstructural and Electrical Properties of Cordierite-based Ceramics Obtained After Two-step Sintering Technique

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

(Međunarodni Institut za nauku o sinterovanju, Beograd, 2016)

TY  - JOUR
AU  - Obradović, Nina
AU  - Filipović, Suzana
AU  - Đorđević, Nataša
AU  - Kosanović, Darko
AU  - Pavlović, Vladimir
AU  - Olcan, Dragan
AU  - Đorđević, Antonije
AU  - Kachlik, Martin
AU  - Maca, Karel
PY  - 2016
UR  - https://ritnms.itnms.ac.rs/handle/123456789/395
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 (epsilon(r)) and loss tangent (tan delta) as a function of time of mechanical treatment.
PB  - Međunarodni Institut za nauku o sinterovanju, Beograd
T2  - Science of Sintering
T1  - Microstructural and Electrical Properties of Cordierite-based Ceramics Obtained After Two-step Sintering Technique
EP  - 165
IS  - 2
SP  - 157
VL  - 48
DO  - 10.2298/SOS1602157O
UR  - https://hdl.handle.net/21.15107/rcub_dais_2314
UR  - conv_766
ER  - 
@article{
author = "Obradović, Nina and Filipović, Suzana and Đorđević, Nataša and Kosanović, Darko and Pavlović, Vladimir and Olcan, 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 (epsilon(r)) and loss tangent (tan delta) as a function of time of mechanical treatment.",
publisher = "Međunarodni Institut za nauku o sinterovanju, Beograd",
journal = "Science of Sintering",
title = "Microstructural and Electrical Properties of Cordierite-based Ceramics Obtained After Two-step Sintering Technique",
pages = "165-157",
number = "2",
volume = "48",
doi = "10.2298/SOS1602157O",
url = "https://hdl.handle.net/21.15107/rcub_dais_2314, conv_766"
}
Obradović, N., Filipović, S., Đorđević, N., Kosanović, D., Pavlović, V., Olcan, 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
Međunarodni Institut za nauku o sinterovanju, Beograd., 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 V, Olcan 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, Olcan, 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 .
9
12
14

Uticaj mehaničke aktivacije na sistem MgO-Al2O3-SiO2 u prisustvu aditiva TeO2

Filipović, Suzana; Obradović, Nina; Đorđević, Nataša; Kosanović, Darko; Marković, Smilja; Mitrić, Miodrag N.; Pavlović, Vladimir B.

(Savez inženjera i tehničara Srbije, Beograd, 2016)

TY  - JOUR
AU  - Filipović, Suzana
AU  - Obradović, Nina
AU  - Đorđević, Nataša
AU  - Kosanović, Darko
AU  - Marković, Smilja
AU  - Mitrić, Miodrag N.
AU  - Pavlović, Vladimir B.
PY  - 2016
UR  - https://ritnms.itnms.ac.rs/handle/123456789/382
AB  - Ova istraživanja posvećena su uticaju mehaničke aktivacije na strukturu kordijeritne smeše 2MgO+2Al2O3+5SiO2. Praćena su i testirana dva paralelna sistema, jedan bez, i drugi u prisustvu 5 masenih % TeO2 kao aditiva. Mehanička aktivacija prahova vršena je u visoko energetskom mlinu sa kuglama u vremenskom intervalu od 0 do 40 minuta. Tokom aktivacije došlo je do reakcije polaznih komponenti u čvrstoj fazi, pri čemu su nastala intermedijarna jedinjenja. Metoda rendgenske difrakcije je korišćena radi identifikacije faznog sastava tokom reakcije, dok su SEM i PSA metode korišćene za praćenje promene morfologije mehanički tretiranih prahova. Cilj aktivacije polaznih prahova je sniženje temperature i mogućnost da se skrati vreme trajanja procesa sinterovanja u postupku dobijanja krajnjeg proizvoda.
AB  - Cordierite 2MgO+2Al2O3+5SiO2 is frequently used ceramic material, that is commonly used as a carrier of electrical components due to its low dielectric constant (~ 5), and low temperature thermal expansion coefficient (20·10-7 oC-1). In order to accelerate the process of sintering, 5.00 mass% TeO2 was added to the starting mixtures. System was tested in two parallel mixtures, one with no additives, and the other one with TeO2. The mechanical activation of the both mixtures was performed in a highenergy ball mill in time intervals from 0 to 40 min with ball to powder mass ratio 1:40. The particle size analysis (PSA) was employed in order to determine the changes in the particle size of the mechanically treated powders. The phase composition of the starting powders as well as microstructures was analyzed by the means of X-ray diffraction method and SEM.
PB  - Savez inženjera i tehničara Srbije, Beograd
T2  - Tehnika
T1  - Uticaj mehaničke aktivacije na sistem MgO-Al2O3-SiO2 u prisustvu aditiva TeO2
T1  - Influence of mechanical activation on MgO-Al2O3-SiO2 system in the presence of TeO2 additive
EP  - 802
IS  - 6
SP  - 797
VL  - 71
DO  - 10.5937/tehnika1606797F
UR  - conv_21
ER  - 
@article{
author = "Filipović, Suzana and Obradović, Nina and Đorđević, Nataša and Kosanović, Darko and Marković, Smilja and Mitrić, Miodrag N. and Pavlović, Vladimir B.",
year = "2016",
abstract = "Ova istraživanja posvećena su uticaju mehaničke aktivacije na strukturu kordijeritne smeše 2MgO+2Al2O3+5SiO2. Praćena su i testirana dva paralelna sistema, jedan bez, i drugi u prisustvu 5 masenih % TeO2 kao aditiva. Mehanička aktivacija prahova vršena je u visoko energetskom mlinu sa kuglama u vremenskom intervalu od 0 do 40 minuta. Tokom aktivacije došlo je do reakcije polaznih komponenti u čvrstoj fazi, pri čemu su nastala intermedijarna jedinjenja. Metoda rendgenske difrakcije je korišćena radi identifikacije faznog sastava tokom reakcije, dok su SEM i PSA metode korišćene za praćenje promene morfologije mehanički tretiranih prahova. Cilj aktivacije polaznih prahova je sniženje temperature i mogućnost da se skrati vreme trajanja procesa sinterovanja u postupku dobijanja krajnjeg proizvoda., Cordierite 2MgO+2Al2O3+5SiO2 is frequently used ceramic material, that is commonly used as a carrier of electrical components due to its low dielectric constant (~ 5), and low temperature thermal expansion coefficient (20·10-7 oC-1). In order to accelerate the process of sintering, 5.00 mass% TeO2 was added to the starting mixtures. System was tested in two parallel mixtures, one with no additives, and the other one with TeO2. The mechanical activation of the both mixtures was performed in a highenergy ball mill in time intervals from 0 to 40 min with ball to powder mass ratio 1:40. The particle size analysis (PSA) was employed in order to determine the changes in the particle size of the mechanically treated powders. The phase composition of the starting powders as well as microstructures was analyzed by the means of X-ray diffraction method and SEM.",
publisher = "Savez inženjera i tehničara Srbije, Beograd",
journal = "Tehnika",
title = "Uticaj mehaničke aktivacije na sistem MgO-Al2O3-SiO2 u prisustvu aditiva TeO2, Influence of mechanical activation on MgO-Al2O3-SiO2 system in the presence of TeO2 additive",
pages = "802-797",
number = "6",
volume = "71",
doi = "10.5937/tehnika1606797F",
url = "conv_21"
}
Filipović, S., Obradović, N., Đorđević, N., Kosanović, D., Marković, S., Mitrić, M. N.,& Pavlović, V. B.. (2016). Uticaj mehaničke aktivacije na sistem MgO-Al2O3-SiO2 u prisustvu aditiva TeO2. in Tehnika
Savez inženjera i tehničara Srbije, Beograd., 71(6), 797-802.
https://doi.org/10.5937/tehnika1606797F
conv_21
Filipović S, Obradović N, Đorđević N, Kosanović D, Marković S, Mitrić MN, Pavlović VB. Uticaj mehaničke aktivacije na sistem MgO-Al2O3-SiO2 u prisustvu aditiva TeO2. in Tehnika. 2016;71(6):797-802.
doi:10.5937/tehnika1606797F
conv_21 .
Filipović, Suzana, Obradović, Nina, Đorđević, Nataša, Kosanović, Darko, Marković, Smilja, Mitrić, Miodrag N., Pavlović, Vladimir B., "Uticaj mehaničke aktivacije na sistem MgO-Al2O3-SiO2 u prisustvu aditiva TeO2" in Tehnika, 71, no. 6 (2016):797-802,
https://doi.org/10.5937/tehnika1606797F .,
conv_21 .
1

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; Olcan, Dragan; Đorđević, Antonije; Kachlik, Martin; Maca, Karel

(Elsevier Sci Ltd, Oxford, 2016)

TY  - JOUR
AU  - Obradović, Nina
AU  - Filipović, Suzana
AU  - Đorđević, Nataša
AU  - Kosanović, Darko
AU  - Marković, Smilja
AU  - Pavlović, Vladimir
AU  - Olcan, Dragan
AU  - Đorđević, Antonije
AU  - Kachlik, Martin
AU  - Maca, Karel
PY  - 2016
UR  - https://ritnms.itnms.ac.rs/handle/123456789/393
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 (epsilon(r)) and loss tangent (tan delta) as a function of the time of mechanical treatment.
PB  - Elsevier Sci Ltd, Oxford
T2  - Ceramics International
T1  - Effects of mechanical activation and two-step sintering on the structure and electrical properties of cordierite-based ceramics
EP  - 13918
IS  - 12
SP  - 13909
VL  - 42
DO  - 10.1016/j.ceramint.2016.05.201
UR  - conv_763
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 and Olcan, 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 (epsilon(r)) and loss tangent (tan delta) as a function of the time of mechanical treatment.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Ceramics International",
title = "Effects of mechanical activation and two-step sintering on the structure and electrical properties of cordierite-based ceramics",
pages = "13918-13909",
number = "12",
volume = "42",
doi = "10.1016/j.ceramint.2016.05.201",
url = "conv_763, https://hdl.handle.net/21.15107/rcub_dais_2322"
}
Obradović, N., Filipović, S., Đorđević, N., Kosanović, D., Marković, S., Pavlović, V., Olcan, 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 Sci Ltd, Oxford., 42(12), 13909-13918.
https://doi.org/10.1016/j.ceramint.2016.05.201
conv_763
Obradović N, Filipović S, Đorđević N, Kosanović D, Marković S, Pavlović V, Olcan 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
conv_763 .
Obradović, Nina, Filipović, Suzana, Đorđević, Nataša, Kosanović, Darko, Marković, Smilja, Pavlović, Vladimir, Olcan, 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 .,
conv_763 .
30
19
28

The Influence of Compaction Pressure on the Density and Electrical Properties of Cordierite-based Ceramics

Obradović, Nina; Đorđević, Nataša; Peleš, A.; Filipović, Suzana; Mitrić, Miodrag; Pavlović, Vladimir

(Međunarodni Institut za nauku o sinterovanju, Beograd, 2015)

TY  - JOUR
AU  - Obradović, Nina
AU  - Đorđević, Nataša
AU  - Peleš, A.
AU  - Filipović, Suzana
AU  - Mitrić, Miodrag
AU  - Pavlović, Vladimir
PY  - 2015
UR  - https://ritnms.itnms.ac.rs/handle/123456789/355
AB  - Due to its characteristics, cordierite, 2MgO center dot 2Al(2)O(3)center dot 5SiO(2), is a high-temperature ceramic material of a great scientific interest. Mechanical activation of the starting mixtures containing 5.00 mass% TiO2 was performed in a high-energy ball mill for 10 minutes. The compaction pressure varied from 0.5 to 6tcm(-2) (49-588 MPa). The sintering process was performed at 1350 degrees C for four hours in the air atmosphere. The phase composition of the activated and sintered samples was analyzed using X-ray diffraction. Scanning electron microscopy was used to analyze the microstructure of both compacted and sintered samples. The authors have investigated the influence of compaction pressure on the sintered samples and their electrical properties.
PB  - Međunarodni Institut za nauku o sinterovanju, Beograd
T2  - Science of Sintering
T1  - The Influence of Compaction Pressure on the Density and Electrical Properties of Cordierite-based Ceramics
EP  - 22
IS  - 1
SP  - 15
VL  - 47
DO  - 10.2298/SOS1501015O
UR  - conv_731
ER  - 
@article{
author = "Obradović, Nina and Đorđević, Nataša and Peleš, A. and Filipović, Suzana and Mitrić, Miodrag and Pavlović, Vladimir",
year = "2015",
abstract = "Due to its characteristics, cordierite, 2MgO center dot 2Al(2)O(3)center dot 5SiO(2), is a high-temperature ceramic material of a great scientific interest. Mechanical activation of the starting mixtures containing 5.00 mass% TiO2 was performed in a high-energy ball mill for 10 minutes. The compaction pressure varied from 0.5 to 6tcm(-2) (49-588 MPa). The sintering process was performed at 1350 degrees C for four hours in the air atmosphere. The phase composition of the activated and sintered samples was analyzed using X-ray diffraction. Scanning electron microscopy was used to analyze the microstructure of both compacted and sintered samples. The authors have investigated the influence of compaction pressure on the sintered samples and their electrical properties.",
publisher = "Međunarodni Institut za nauku o sinterovanju, Beograd",
journal = "Science of Sintering",
title = "The Influence of Compaction Pressure on the Density and Electrical Properties of Cordierite-based Ceramics",
pages = "22-15",
number = "1",
volume = "47",
doi = "10.2298/SOS1501015O",
url = "conv_731"
}
Obradović, N., Đorđević, N., Peleš, A., Filipović, S., Mitrić, M.,& Pavlović, V.. (2015). The Influence of Compaction Pressure on the Density and Electrical Properties of Cordierite-based Ceramics. in Science of Sintering
Međunarodni Institut za nauku o sinterovanju, Beograd., 47(1), 15-22.
https://doi.org/10.2298/SOS1501015O
conv_731
Obradović N, Đorđević N, Peleš A, Filipović S, Mitrić M, Pavlović V. The Influence of Compaction Pressure on the Density and Electrical Properties of Cordierite-based Ceramics. in Science of Sintering. 2015;47(1):15-22.
doi:10.2298/SOS1501015O
conv_731 .
Obradović, Nina, Đorđević, Nataša, Peleš, A., Filipović, Suzana, Mitrić, Miodrag, Pavlović, Vladimir, "The Influence of Compaction Pressure on the Density and Electrical Properties of Cordierite-based Ceramics" in Science of Sintering, 47, no. 1 (2015):15-22,
https://doi.org/10.2298/SOS1501015O .,
conv_731 .
5
8
9

Influence of mechanochemical activation on the sintering of cordierite ceramics in the presence of Bi2O3 as a functional additive

Obradović, Nina; Đorđević, Nataša; Filipović, Suzana; Nikolić, N.; Kosanović, Darko; Mitrić, Miodrag; Marković, Smilja; Pavlović, Vladimir

(Elsevier, Amsterdam, 2012)

TY  - JOUR
AU  - Obradović, Nina
AU  - Đorđević, Nataša
AU  - Filipović, Suzana
AU  - Nikolić, N.
AU  - Kosanović, Darko
AU  - Mitrić, Miodrag
AU  - Marković, Smilja
AU  - Pavlović, Vladimir
PY  - 2012
UR  - https://ritnms.itnms.ac.rs/handle/123456789/202
AB  - Due to its outstanding electrical characteristics, such as the low temperature expansion coefficient, low dielectric constant and good mechanical properties, cordierite, 2MgO center dot 2Al(2)O(3)center dot 5SiO(2), is a very attractive high-temperature ceramic material. In order to accelerate the process of sintering, 2.50 mass% Bi2O3 has been added to the starting mixtures. Liquid phase sintering caused by the presence of bismuth-oxide lowers the temperature of cordierite formation. The mechanical activation of the starting mixtures (0-56 min in vibro-mill) additionally lowers sintering temperatures. The sintering process was performed at 1200, 1300, 1350 and 1400 degrees C, for 2 h. 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 materials was analyzed by the X-ray diffraction method. Furthermore, scanning electron microscopy (SEM) was used in the analysis of the powder morphology.
PB  - Elsevier, Amsterdam
T2  - Powder Technology
T1  - Influence of mechanochemical activation on the sintering of cordierite ceramics in the presence of Bi2O3 as a functional additive
EP  - 161
SP  - 157
VL  - 218
DO  - 10.1016/j.powtec.2011.12.012
UR  - conv_610
ER  - 
@article{
author = "Obradović, Nina and Đorđević, Nataša and Filipović, Suzana and Nikolić, N. and Kosanović, Darko and Mitrić, Miodrag and Marković, Smilja and Pavlović, Vladimir",
year = "2012",
abstract = "Due to its outstanding electrical characteristics, such as the low temperature expansion coefficient, low dielectric constant and good mechanical properties, cordierite, 2MgO center dot 2Al(2)O(3)center dot 5SiO(2), is a very attractive high-temperature ceramic material. In order to accelerate the process of sintering, 2.50 mass% Bi2O3 has been added to the starting mixtures. Liquid phase sintering caused by the presence of bismuth-oxide lowers the temperature of cordierite formation. The mechanical activation of the starting mixtures (0-56 min in vibro-mill) additionally lowers sintering temperatures. The sintering process was performed at 1200, 1300, 1350 and 1400 degrees C, for 2 h. 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 materials was analyzed by the X-ray diffraction method. Furthermore, scanning electron microscopy (SEM) was used in the analysis of the powder morphology.",
publisher = "Elsevier, Amsterdam",
journal = "Powder Technology",
title = "Influence of mechanochemical activation on the sintering of cordierite ceramics in the presence of Bi2O3 as a functional additive",
pages = "161-157",
volume = "218",
doi = "10.1016/j.powtec.2011.12.012",
url = "conv_610"
}
Obradović, N., Đorđević, N., Filipović, S., Nikolić, N., Kosanović, D., Mitrić, M., Marković, S.,& Pavlović, V.. (2012). Influence of mechanochemical activation on the sintering of cordierite ceramics in the presence of Bi2O3 as a functional additive. in Powder Technology
Elsevier, Amsterdam., 218, 157-161.
https://doi.org/10.1016/j.powtec.2011.12.012
conv_610
Obradović N, Đorđević N, Filipović S, Nikolić N, Kosanović D, Mitrić M, Marković S, Pavlović V. Influence of mechanochemical activation on the sintering of cordierite ceramics in the presence of Bi2O3 as a functional additive. in Powder Technology. 2012;218:157-161.
doi:10.1016/j.powtec.2011.12.012
conv_610 .
Obradović, Nina, Đorđević, Nataša, Filipović, Suzana, Nikolić, N., Kosanović, Darko, Mitrić, Miodrag, Marković, Smilja, Pavlović, Vladimir, "Influence of mechanochemical activation on the sintering of cordierite ceramics in the presence of Bi2O3 as a functional additive" in Powder Technology, 218 (2012):157-161,
https://doi.org/10.1016/j.powtec.2011.12.012 .,
conv_610 .
36
32
44

Electrical properties of mechanochemically activated cordierite ceramics

Đorđević, Nataša; Obradović, Nina; Filipović, Suzana

(Springer, New York, 2012)

TY  - JOUR
AU  - Đorđević, Nataša
AU  - Obradović, Nina
AU  - Filipović, Suzana
PY  - 2012
UR  - https://ritnms.itnms.ac.rs/handle/123456789/210
AB  - Three-component oxide mixtures were prepared containing MgO, Al (2) O (3) and SiO (2) in a 2 : 2 : 5 ratio with addition of 10% Bi (2) O (3). The mixtures were mechanically activated in a range from 5 to 240 min in a mill with ceramic balls, and sintered in the range 1173-1573 K. In order to determine the structure transformations, sintered products were analyzed by the XRD method. The goal of the research was to find the possible correlation between process parameters and functional properties of the cordierite-based ceramic materials. Quantitative measures of the functional sample properties, capacity (C (c) ) and electrical resistance (R (rho)), as well as of dielectric loss (tg delta) were used. The results obtained prove that there is a correlation between mechanical activation and properties of cordierite ceramics.
PB  - Springer, New York
T2  - Powder Metallurgy and Metal Ceramics
T1  - Electrical properties of mechanochemically activated cordierite ceramics
EP  - 86
IS  - 1-2
SP  - 83
VL  - 51
DO  - 10.1007/s11106-012-9400-y
UR  - https://hdl.handle.net/21.15107/rcub_dais_461
UR  - conv_627
ER  - 
@article{
author = "Đorđević, Nataša and Obradović, Nina and Filipović, Suzana",
year = "2012",
abstract = "Three-component oxide mixtures were prepared containing MgO, Al (2) O (3) and SiO (2) in a 2 : 2 : 5 ratio with addition of 10% Bi (2) O (3). The mixtures were mechanically activated in a range from 5 to 240 min in a mill with ceramic balls, and sintered in the range 1173-1573 K. In order to determine the structure transformations, sintered products were analyzed by the XRD method. The goal of the research was to find the possible correlation between process parameters and functional properties of the cordierite-based ceramic materials. Quantitative measures of the functional sample properties, capacity (C (c) ) and electrical resistance (R (rho)), as well as of dielectric loss (tg delta) were used. The results obtained prove that there is a correlation between mechanical activation and properties of cordierite ceramics.",
publisher = "Springer, New York",
journal = "Powder Metallurgy and Metal Ceramics",
title = "Electrical properties of mechanochemically activated cordierite ceramics",
pages = "86-83",
number = "1-2",
volume = "51",
doi = "10.1007/s11106-012-9400-y",
url = "https://hdl.handle.net/21.15107/rcub_dais_461, conv_627"
}
Đorđević, N., Obradović, N.,& Filipović, S.. (2012). Electrical properties of mechanochemically activated cordierite ceramics. in Powder Metallurgy and Metal Ceramics
Springer, New York., 51(1-2), 83-86.
https://doi.org/10.1007/s11106-012-9400-y
https://hdl.handle.net/21.15107/rcub_dais_461
Đorđević N, Obradović N, Filipović S. Electrical properties of mechanochemically activated cordierite ceramics. in Powder Metallurgy and Metal Ceramics. 2012;51(1-2):83-86.
doi:10.1007/s11106-012-9400-y
https://hdl.handle.net/21.15107/rcub_dais_461 .
Đorđević, Nataša, Obradović, Nina, Filipović, Suzana, "Electrical properties of mechanochemically activated cordierite ceramics" in Powder Metallurgy and Metal Ceramics, 51, no. 1-2 (2012):83-86,
https://doi.org/10.1007/s11106-012-9400-y .,
https://hdl.handle.net/21.15107/rcub_dais_461 .
1
2

Uticaj mehaničke energije na komponente MgO-Al2O3-SiO2-TiO2 sistema

Đorđević, Nataša; Obradović, Nina; Filipović, Suzana; Živojinović, Jelena; Mitrić, Miodrag; Marković, Smilja

(Savez inženjera i tehničara Srbije, Beograd, 2012)

TY  - JOUR
AU  - Đorđević, Nataša
AU  - Obradović, Nina
AU  - Filipović, Suzana
AU  - Živojinović, Jelena
AU  - Mitrić, Miodrag
AU  - Marković, Smilja
PY  - 2012
UR  - https://ritnms.itnms.ac.rs/handle/123456789/239
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  - Savez inženjera i tehničara Srbije, Beograd
T2  - Tehnika
T1  - Uticaj mehaničke energije na komponente MgO-Al2O3-SiO2-TiO2 sistema
T1  - Influence of mechanical activation on the constituents of the MgO-Al2O3-SiO2-TiO2 system
EP  - 333
IS  - 3
SP  - 329
VL  - 67
UR  - conv_7
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 = "Savez inženjera i tehničara Srbije, Beograd",
journal = "Tehnika",
title = "Uticaj mehaničke energije na komponente MgO-Al2O3-SiO2-TiO2 sistema, Influence of mechanical activation on the constituents of the MgO-Al2O3-SiO2-TiO2 system",
pages = "333-329",
number = "3",
volume = "67",
url = "conv_7"
}
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
Savez inženjera i tehničara Srbije, Beograd., 67(3), 329-333.
conv_7
Đorđević N, Obradović N, Filipović S, Živojinović J, Mitrić M, Marković S. Uticaj mehaničke energije na komponente MgO-Al2O3-SiO2-TiO2 sistema. in Tehnika. 2012;67(3):329-333.
conv_7 .
Đorđević, Nataša, Obradović, Nina, Filipović, Suzana, Živojinović, Jelena, Mitrić, Miodrag, Marković, Smilja, "Uticaj mehaničke energije na komponente MgO-Al2O3-SiO2-TiO2 sistema" in Tehnika, 67, no. 3 (2012):329-333,
conv_7 .

Isothermal sintering of barium-zinc-titanate ceramics

Obradović, Nina; Filipović, Suzana; Pavlović, V.; Mitrić, Miodrag; Marković, Smilja; Mitić, Vojislav V.; Đorđević, Nataša; Ristić, M. M.

(Elsevier Sci Ltd, Oxford, 2011)

TY  - JOUR
AU  - Obradović, Nina
AU  - Filipović, Suzana
AU  - Pavlović, V.
AU  - Mitrić, Miodrag
AU  - Marković, Smilja
AU  - Mitić, Vojislav V.
AU  - Đorđević, Nataša
AU  - Ristić, M. M.
PY  - 2011
UR  - https://ritnms.itnms.ac.rs/handle/123456789/201
AB  - Mixtures of BaCO3-ZnO-TiO2 were mechanically activated using high-energy planetary ball mill during 20, 40 and 80 min. As the time of mechanical activation increased, the decrease in particle size was observed. The effect of milling on microstructure was investigated by scanning electron microscopy, as well. Sintering process was performed in air at 1100 and 1200 C for 2 h. Various phases are present within mixtures sintered at 1100 and 1200 degrees C, and almost pure BaZn2Ti4O11 phase was obtained after 80 min of milling and sintering at 1200 degrees C for 2 h.
PB  - Elsevier Sci Ltd, Oxford
T2  - Ceramics International
T1  - Isothermal sintering of barium-zinc-titanate ceramics
EP  - 27
IS  - 1
SP  - 21
VL  - 37
DO  - 10.1016/j.ceramint.2010.07.001
UR  - conv_596
ER  - 
@article{
author = "Obradović, Nina and Filipović, Suzana and Pavlović, V. and Mitrić, Miodrag and Marković, Smilja and Mitić, Vojislav V. and Đorđević, Nataša and Ristić, M. M.",
year = "2011",
abstract = "Mixtures of BaCO3-ZnO-TiO2 were mechanically activated using high-energy planetary ball mill during 20, 40 and 80 min. As the time of mechanical activation increased, the decrease in particle size was observed. The effect of milling on microstructure was investigated by scanning electron microscopy, as well. Sintering process was performed in air at 1100 and 1200 C for 2 h. Various phases are present within mixtures sintered at 1100 and 1200 degrees C, and almost pure BaZn2Ti4O11 phase was obtained after 80 min of milling and sintering at 1200 degrees C for 2 h.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Ceramics International",
title = "Isothermal sintering of barium-zinc-titanate ceramics",
pages = "27-21",
number = "1",
volume = "37",
doi = "10.1016/j.ceramint.2010.07.001",
url = "conv_596"
}
Obradović, N., Filipović, S., Pavlović, V., Mitrić, M., Marković, S., Mitić, V. V., Đorđević, N.,& Ristić, M. M.. (2011). Isothermal sintering of barium-zinc-titanate ceramics. in Ceramics International
Elsevier Sci Ltd, Oxford., 37(1), 21-27.
https://doi.org/10.1016/j.ceramint.2010.07.001
conv_596
Obradović N, Filipović S, Pavlović V, Mitrić M, Marković S, Mitić VV, Đorđević N, Ristić MM. Isothermal sintering of barium-zinc-titanate ceramics. in Ceramics International. 2011;37(1):21-27.
doi:10.1016/j.ceramint.2010.07.001
conv_596 .
Obradović, Nina, Filipović, Suzana, Pavlović, V., Mitrić, Miodrag, Marković, Smilja, Mitić, Vojislav V., Đorđević, Nataša, Ristić, M. M., "Isothermal sintering of barium-zinc-titanate ceramics" in Ceramics International, 37, no. 1 (2011):21-27,
https://doi.org/10.1016/j.ceramint.2010.07.001 .,
conv_596 .
5
7
5

Kinetika mehanohemijske sinteze barijum-titanata

Đorđević, Nataša; Obradović, Nina; Filipović, Suzana

(Savez inženjera i tehničara Srbije, Beograd, 2011)

TY  - JOUR
AU  - Đorđević, Nataša
AU  - Obradović, Nina
AU  - Filipović, Suzana
PY  - 2011
UR  - https://ritnms.itnms.ac.rs/handle/123456789/198
AB  - U ovom radu ispitivan je uticaj mehaničke aktivacije na sistem barijum oksid-titan dioksid. Mehanička aktivacija je vršena u vibro-mlinu u vremenskom intervalu od 30 do 440 minuta. Tokom aktivacije došlo je do reakcije polaznih komponenti u čvrstoj fazi, pri čemu je kao krajnji produkt dobijen barijum-titanat. Metode rendgenske difrakcije i spektrofotometrijske analize su korišćene radi identifikacije faznog sastava i kvantitativnog sadržaja komponenti tokom reakcije. Predložen je mehanizam sinteze barijum-titanata i utvrđeni su kinetički parametri.
AB  - In this paper the influence of mechanical activation on the system barium oxide - titan dioxide has been investigated. Also, the theoretic model of mechanochemical reaction has been introduced. Process of mechanical activation was conducted in vibro-mill in the 30 to 440 minutes interval. Solid state reaction has been noticed during the activation process. X-ray diffraction method has been employed in order to determine phase composition of mechanically activated mixtures. The process of milling could be divided into three stages: first stage-progressive destruction of reactant's crystal structure; second phase-nanocrystal structure formation as a consequence of defects introduction within crystal structure; third phase-obvious formation of a new phase and peak's intensities growth caused by crystal phase arranging. It was noticed that barium titanate was obtained successfully at the end of the milling process. Method of spectrofotometry has been chosen for determining the quantitative ratio of starting components during the reaction. The authors suggested the synthesis mechanism of barium-titanate and established the kinetic parameters. Also, it was notices that the reaction between barium oxide and titan dioxide represents 'two-stages' reaction, which includes the formation of intermediate compound BaO*TiO2. Having in mind that the constant of reaction velocity of the process of intermediate compound formation is greater than constant of barium titanate formation, we can conclude that activation energy of first stage is less than activation energy of second process. Analysis of kinetics showed that the half-time synthesis of mentioned compound is 77.7 minutes, while at the end of milling process the reaction between starting reactants was complete.
PB  - Savez inženjera i tehničara Srbije, Beograd
T2  - Tehnika
T1  - Kinetika mehanohemijske sinteze barijum-titanata
T1  - Kinetics of mechanochemical synthesis of barium-titanate
EP  - 371
IS  - 3
SP  - 367
VL  - 66
UR  - conv_2
ER  - 
@article{
author = "Đorđević, Nataša and Obradović, Nina and Filipović, Suzana",
year = "2011",
abstract = "U ovom radu ispitivan je uticaj mehaničke aktivacije na sistem barijum oksid-titan dioksid. Mehanička aktivacija je vršena u vibro-mlinu u vremenskom intervalu od 30 do 440 minuta. Tokom aktivacije došlo je do reakcije polaznih komponenti u čvrstoj fazi, pri čemu je kao krajnji produkt dobijen barijum-titanat. Metode rendgenske difrakcije i spektrofotometrijske analize su korišćene radi identifikacije faznog sastava i kvantitativnog sadržaja komponenti tokom reakcije. Predložen je mehanizam sinteze barijum-titanata i utvrđeni su kinetički parametri., In this paper the influence of mechanical activation on the system barium oxide - titan dioxide has been investigated. Also, the theoretic model of mechanochemical reaction has been introduced. Process of mechanical activation was conducted in vibro-mill in the 30 to 440 minutes interval. Solid state reaction has been noticed during the activation process. X-ray diffraction method has been employed in order to determine phase composition of mechanically activated mixtures. The process of milling could be divided into three stages: first stage-progressive destruction of reactant's crystal structure; second phase-nanocrystal structure formation as a consequence of defects introduction within crystal structure; third phase-obvious formation of a new phase and peak's intensities growth caused by crystal phase arranging. It was noticed that barium titanate was obtained successfully at the end of the milling process. Method of spectrofotometry has been chosen for determining the quantitative ratio of starting components during the reaction. The authors suggested the synthesis mechanism of barium-titanate and established the kinetic parameters. Also, it was notices that the reaction between barium oxide and titan dioxide represents 'two-stages' reaction, which includes the formation of intermediate compound BaO*TiO2. Having in mind that the constant of reaction velocity of the process of intermediate compound formation is greater than constant of barium titanate formation, we can conclude that activation energy of first stage is less than activation energy of second process. Analysis of kinetics showed that the half-time synthesis of mentioned compound is 77.7 minutes, while at the end of milling process the reaction between starting reactants was complete.",
publisher = "Savez inženjera i tehničara Srbije, Beograd",
journal = "Tehnika",
title = "Kinetika mehanohemijske sinteze barijum-titanata, Kinetics of mechanochemical synthesis of barium-titanate",
pages = "371-367",
number = "3",
volume = "66",
url = "conv_2"
}
Đorđević, N., Obradović, N.,& Filipović, S.. (2011). Kinetika mehanohemijske sinteze barijum-titanata. in Tehnika
Savez inženjera i tehničara Srbije, Beograd., 66(3), 367-371.
conv_2
Đorđević N, Obradović N, Filipović S. Kinetika mehanohemijske sinteze barijum-titanata. in Tehnika. 2011;66(3):367-371.
conv_2 .
Đorđević, Nataša, Obradović, Nina, Filipović, Suzana, "Kinetika mehanohemijske sinteze barijum-titanata" in Tehnika, 66, no. 3 (2011):367-371,
conv_2 .