TY  - JOUR
AU  - Terzić, Anja
AU  - Pavlović, Ljubica
AU  - Obradović, Nina
AU  - Pavlović, Vladimir
AU  - Stojanović, Jovica
AU  - Milicić, Ljiljana
AU  - Radojević, Zagorka
AU  - Ristić, M.M.
PY  - 2012
UR  - https://ritnms.itnms.ac.rs/handle/123456789/226
AB  - Količina letećeg pepela koji se proizvodi i koja će biti proizvedena u godinama koje dolaze zahteva razvoj novih metoda recikliranja u kojima će biti upotrebljene značajne količine ovog otpadnog materijala. Mogućnost visoko-temperaturne aplikacije (termoizolacioni i vatrostalni materijali) ukazuje na novu mogućnost za primenu letećeg pepela. Za takvu primenu leteći pepeo mora da zadovolji visoke mehaničke i termičke kriterijume. Jedan od načina da se to postigne je mehanička aktivacija letećeg pepela. U ovom radu prikazani su rezultati mehaničke aktivacije pepela iz dve različite termo-elektrane pomoću planetarnog mlina. Aktivirani pepeli su mešani sa dva veziva: portland cementom i visoko-aluminatnim cementom. Akcenat je na analizi fizičko-hemijskih svojstava i mineroloških faza zbog promena koje se dešavaju u kompozitima usled mehaničke aktivacije pepela i sinterovanja. Makro svojstva kompozita su povezana sa mikrostrukturom ispitivanom pomoću SEM analize i Rendgenske difrakcije. Termijska stabilnost kristalnih faza ispitivana je pomoću DTA. Akcenat je na utvrđivanju korelacija između mehaničke aktivacije letećeg pepela i mikrostrukture kompozita na jednoj i svojstava sinterovanog kompozita na drugoj strani.
AB  - Amount of fly ash which is and yet to be generated in the coming years highlights the necessity of developing new methods of the recycling where this waste can be reused in significant quantity. A new possibility for fly ash utilization is in high-temperature application (thermal insulators or/and refractory material products). As such, fly ash has to adequately answer the mechanical and thermal stability criteria. One of the ways of achieving it is by applying mechanical activation procedure on fly ash. In present study, fly ashes from two different power plants were mechanically activated in a planetary ball mill. Mechanically treated fly ashes were cemented with two different binders: standard Portland cement and high-aluminates cement. Physico-chemical analysis and investigation of mineralogical components of composites are emphasized, due to the changes occurred in fly ash during mechanical activation and sintering of composites. Macro-performance of the composites was correlated to the microstructure of fly ash studied by means of XRD and SEM analysis. Thermal stability of crystalline phases was investigated with DTA. Highlight was placed on determination of relationship between mechanically activated fly ash and obtained composites microstructure on one side and behavior of sintered composites on the other side.
PB  - Međunarodni Institut za nauku o sinterovanju, Beograd
T2  - Science of Sintering
T1  - Synthesis and sintering of high-temperature composites based on mechanically activated fly ash
EP  - 146
IS  - 2
SP  - 135
VL  - 44
DO  - 10.2298/SOS1202135T
UR  - conv_654
ER  - 

@article{
author = "Terzić, Anja and Pavlović, Ljubica and Obradović, Nina and Pavlović, Vladimir and Stojanović, Jovica and Milicić, Ljiljana and Radojević, Zagorka and Ristić, M.M.",
year = "2012",
abstract = "Količina letećeg pepela koji se proizvodi i koja će biti proizvedena u godinama koje dolaze zahteva razvoj novih metoda recikliranja u kojima će biti upotrebljene značajne količine ovog otpadnog materijala. Mogućnost visoko-temperaturne aplikacije (termoizolacioni i vatrostalni materijali) ukazuje na novu mogućnost za primenu letećeg pepela. Za takvu primenu leteći pepeo mora da zadovolji visoke mehaničke i termičke kriterijume. Jedan od načina da se to postigne je mehanička aktivacija letećeg pepela. U ovom radu prikazani su rezultati mehaničke aktivacije pepela iz dve različite termo-elektrane pomoću planetarnog mlina. Aktivirani pepeli su mešani sa dva veziva: portland cementom i visoko-aluminatnim cementom. Akcenat je na analizi fizičko-hemijskih svojstava i mineroloških faza zbog promena koje se dešavaju u kompozitima usled mehaničke aktivacije pepela i sinterovanja. Makro svojstva kompozita su povezana sa mikrostrukturom ispitivanom pomoću SEM analize i Rendgenske difrakcije. Termijska stabilnost kristalnih faza ispitivana je pomoću DTA. Akcenat je na utvrđivanju korelacija između mehaničke aktivacije letećeg pepela i mikrostrukture kompozita na jednoj i svojstava sinterovanog kompozita na drugoj strani., Amount of fly ash which is and yet to be generated in the coming years highlights the necessity of developing new methods of the recycling where this waste can be reused in significant quantity. A new possibility for fly ash utilization is in high-temperature application (thermal insulators or/and refractory material products). As such, fly ash has to adequately answer the mechanical and thermal stability criteria. One of the ways of achieving it is by applying mechanical activation procedure on fly ash. In present study, fly ashes from two different power plants were mechanically activated in a planetary ball mill. Mechanically treated fly ashes were cemented with two different binders: standard Portland cement and high-aluminates cement. Physico-chemical analysis and investigation of mineralogical components of composites are emphasized, due to the changes occurred in fly ash during mechanical activation and sintering of composites. Macro-performance of the composites was correlated to the microstructure of fly ash studied by means of XRD and SEM analysis. Thermal stability of crystalline phases was investigated with DTA. Highlight was placed on determination of relationship between mechanically activated fly ash and obtained composites microstructure on one side and behavior of sintered composites on the other side.",
publisher = "Međunarodni Institut za nauku o sinterovanju, Beograd",
journal = "Science of Sintering",
title = "Synthesis and sintering of high-temperature composites based on mechanically activated fly ash",
pages = "146-135",
number = "2",
volume = "44",
doi = "10.2298/SOS1202135T",
url = "conv_654"
}

Terzić, A., Pavlović, L., Obradović, N., Pavlović, V., Stojanović, J., Milicić, L., Radojević, Z.,& Ristić, M.M.. (2012). Synthesis and sintering of high-temperature composites based on mechanically activated fly ash. in Science of Sintering
Međunarodni Institut za nauku o sinterovanju, Beograd., 44(2), 135-146.
https://doi.org/10.2298/SOS1202135T
conv_654

Terzić A, Pavlović L, Obradović N, Pavlović V, Stojanović J, Milicić L, Radojević Z, Ristić M. Synthesis and sintering of high-temperature composites based on mechanically activated fly ash. in Science of Sintering. 2012;44(2):135-146.
doi:10.2298/SOS1202135T
conv_654 .

Terzić, Anja, Pavlović, Ljubica, Obradović, Nina, Pavlović, Vladimir, Stojanović, Jovica, Milicić, Ljiljana, Radojević, Zagorka, Ristić, M.M., "Synthesis and sintering of high-temperature composites based on mechanically activated fly ash" in Science of Sintering, 44, no. 2 (2012):135-146,
https://doi.org/10.2298/SOS1202135T .,
conv_654 .

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 .

TY  - JOUR
AU  - Marinković, Z.V.
AU  - Nikolić, N.
AU  - Stojanović, Jovica
AU  - Pavlović, Ljubica
AU  - Ristić, M.M.
PY  - 2001
UR  - https://ritnms.itnms.ac.rs/handle/123456789/32
AB  - Mechanical activation of simple and complex powder systems is very often used as a method for modification of physico-chemical properties in technologies for obtaining advanced materials. The present work reports on investigation of cordierite formation from starting powders mixture of basic magnesium carbonate (BMC) and kaolinite. Starting powders mixture were mechanically activated in a high energy vibromill. The grinding times were 10, 20 and 40 minutes. Amorphization process of starting compounds in mixtures and phase transformations during supplementary thermal treatment were examined by X-ray powder diffraction (XRPD). Differential thermal analysis (DTA) is a convenient method for investigating chemical thermodynamics and formal kinetic descriptions of physico-chemical processes. Formal kinetic analysis of cordierite formation in non-isothermal conditions were excersited using kinetic theory in stationary point according to Kissinger and Ozawa method. Set of DTA measurements with different heating rate of 10, 15, 20 and 30 K/min were used for determining activation energy of cordierite formation from the starting amorphous material.
PB  - Univerzitet u Beogradu - Tehnički fakultet u Boru, Beograd
T2  - Journal of Mining and Metallurgy B: Metallurgy
T1  - The influence of mechanical activation of starting components on kinetics of cordierite formation
EP  - 75
IS  - 3-4
SP  - 67
VL  - 37
UR  - conv_321
ER  - 

@article{
author = "Marinković, Z.V. and Nikolić, N. and Stojanović, Jovica and Pavlović, Ljubica and Ristić, M.M.",
year = "2001",
abstract = "Mechanical activation of simple and complex powder systems is very often used as a method for modification of physico-chemical properties in technologies for obtaining advanced materials. The present work reports on investigation of cordierite formation from starting powders mixture of basic magnesium carbonate (BMC) and kaolinite. Starting powders mixture were mechanically activated in a high energy vibromill. The grinding times were 10, 20 and 40 minutes. Amorphization process of starting compounds in mixtures and phase transformations during supplementary thermal treatment were examined by X-ray powder diffraction (XRPD). Differential thermal analysis (DTA) is a convenient method for investigating chemical thermodynamics and formal kinetic descriptions of physico-chemical processes. Formal kinetic analysis of cordierite formation in non-isothermal conditions were excersited using kinetic theory in stationary point according to Kissinger and Ozawa method. Set of DTA measurements with different heating rate of 10, 15, 20 and 30 K/min were used for determining activation energy of cordierite formation from the starting amorphous material.",
publisher = "Univerzitet u Beogradu - Tehnički fakultet u Boru, Beograd",
journal = "Journal of Mining and Metallurgy B: Metallurgy",
title = "The influence of mechanical activation of starting components on kinetics of cordierite formation",
pages = "75-67",
number = "3-4",
volume = "37",
url = "conv_321"
}

Marinković, Z.V., Nikolić, N., Stojanović, J., Pavlović, L.,& Ristić, M.M.. (2001). The influence of mechanical activation of starting components on kinetics of cordierite formation. in Journal of Mining and Metallurgy B: Metallurgy
Univerzitet u Beogradu - Tehnički fakultet u Boru, Beograd., 37(3-4), 67-75.
conv_321

Marinković Z, Nikolić N, Stojanović J, Pavlović L, Ristić M. The influence of mechanical activation of starting components on kinetics of cordierite formation. in Journal of Mining and Metallurgy B: Metallurgy. 2001;37(3-4):67-75.
conv_321 .

Marinković, Z.V., Nikolić, N., Stojanović, Jovica, Pavlović, Ljubica, Ristić, M.M., "The influence of mechanical activation of starting components on kinetics of cordierite formation" in Journal of Mining and Metallurgy B: Metallurgy, 37, no. 3-4 (2001):67-75,
conv_321 .