Serbian Academy of Sciences and Arts, Project F-7/II

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Serbian Academy of Sciences and Arts, Project F-7/II

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Publications

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 B.

(Springer, 2016)

TY  - JOUR
AU  - Obradović, Nina
AU  - Đorđević, Nataša
AU  - Filipović, Suzana
AU  - Marković, Smilja
AU  - Kosanović, Darko
AU  - Mitrić, Miodrag
AU  - Pavlović, Vladimir B.
PY  - 2016
AB  - Since cordierite, 2MgO·2Al2O3·5SiO2 (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 °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 °C, comparing to the literature data.
PB  - Springer
T2  - Journal of Thermal Analysis and Calorimetry
T1  - Reaction kinetics of mechanically activated cordierite-based ceramics studied via DTA
SP  - 667
EP  - 673
VL  - 124
IS  - 2
DO  - 10.1007/s10973-015-5132-9
ER  - 
@article{
author = "Obradović, Nina and Đorđević, Nataša and Filipović, Suzana and Marković, Smilja and Kosanović, Darko and Mitrić, Miodrag and Pavlović, Vladimir B.",
year = "2016",
abstract = "Since cordierite, 2MgO·2Al2O3·5SiO2 (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 °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 °C, comparing to the literature data.",
publisher = "Springer",
journal = "Journal of Thermal Analysis and Calorimetry",
title = "Reaction kinetics of mechanically activated cordierite-based ceramics studied via DTA",
pages = "667-673",
volume = "124",
number = "2",
doi = "10.1007/s10973-015-5132-9"
}
Obradović, N., Đorđević, N., Filipović, S., Marković, S., Kosanović, D., Mitrić, M.,& Pavlović, V. B. (2016). Reaction kinetics of mechanically activated cordierite-based ceramics studied via DTA.
Journal of Thermal Analysis and Calorimetry
Springer., 124(2), 667-673.
https://doi.org/10.1007/s10973-015-5132-9
Obradović N, Đorđević N, Filipović S, Marković S, Kosanović D, Mitrić M, Pavlović VB. Reaction kinetics of mechanically activated cordierite-based ceramics studied via DTA. Journal of Thermal Analysis and Calorimetry. 2016;124(2):667-673.
doi:10.1007/s10973-015-5132-9.
Obradović Nina, Đorđević Nataša, Filipović Suzana, Marković Smilja, Kosanović Darko, Mitrić Miodrag, Pavlović Vladimir B., "Reaction kinetics of mechanically activated cordierite-based ceramics studied via DTA" Journal of Thermal Analysis and Calorimetry, 124, no. 2 (2016):667-673,
https://doi.org/10.1007/s10973-015-5132-9 .
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Far infrared reflectance of sintered Zn2TiO4

Nikolić, Maria Vesna; Obradović, Nina; Paraskevopoulos, Konstantinos M.; Zorba, Triantafyllia T.; Savić, Slavica M.; Ristić, Momčilo M.

(Springer Science+Business Media, 2008)

TY  - JOUR
AU  - Nikolić, Maria Vesna
AU  - Obradović, Nina
AU  - Paraskevopoulos, Konstantinos M.
AU  - Zorba, Triantafyllia T.
AU  - Savić, Slavica M.
AU  - Ristić, Momčilo M.
PY  - 2008
AB  - Zinc-titanate ceramics were obtained by initial mechanical activation in a high-energy planetary mill for 15 min followed by sintering at temperatures 900-1100°C for 2 h. Room temperature far infrared reflectivity spectra for all samples were measured in the range 100-1200 cm-1. The same ionic oscillators were present in the measured spectra, but their intensities increased with the sintering temperature in correlation with the increase in sample density and microstructure changes. Optical parameters were determined for seven oscillators belonging to the spinel structure using the four-parameter model of coupled oscillators. Born effective charges were calculated from the transversal/longitudinal splitting. © 2008 Springer Science+Business Media, LLC.
PB  - Springer Science+Business Media
T2  - Journal of Materials Science
T1  - Far infrared reflectance of sintered Zn2TiO4
SP  - 5564
EP  - 5568
VL  - 43
IS  - 16
DO  - 10.1007/s10853-008-2819-3
ER  - 
@article{
author = "Nikolić, Maria Vesna and Obradović, Nina and Paraskevopoulos, Konstantinos M. and Zorba, Triantafyllia T. and Savić, Slavica M. and Ristić, Momčilo M.",
year = "2008",
abstract = "Zinc-titanate ceramics were obtained by initial mechanical activation in a high-energy planetary mill for 15 min followed by sintering at temperatures 900-1100°C for 2 h. Room temperature far infrared reflectivity spectra for all samples were measured in the range 100-1200 cm-1. The same ionic oscillators were present in the measured spectra, but their intensities increased with the sintering temperature in correlation with the increase in sample density and microstructure changes. Optical parameters were determined for seven oscillators belonging to the spinel structure using the four-parameter model of coupled oscillators. Born effective charges were calculated from the transversal/longitudinal splitting. © 2008 Springer Science+Business Media, LLC.",
publisher = "Springer Science+Business Media",
journal = "Journal of Materials Science",
title = "Far infrared reflectance of sintered Zn2TiO4",
pages = "5564-5568",
volume = "43",
number = "16",
doi = "10.1007/s10853-008-2819-3"
}
Nikolić, M. V., Obradović, N., Paraskevopoulos, K. M., Zorba, T. T., Savić, S. M.,& Ristić, M. M. (2008). Far infrared reflectance of sintered Zn2TiO4.
Journal of Materials Science
Springer Science+Business Media., 43(16), 5564-5568.
https://doi.org/10.1007/s10853-008-2819-3
Nikolić MV, Obradović N, Paraskevopoulos KM, Zorba TT, Savić SM, Ristić MM. Far infrared reflectance of sintered Zn2TiO4. Journal of Materials Science. 2008;43(16):5564-5568.
doi:10.1007/s10853-008-2819-3.
Nikolić Maria Vesna, Obradović Nina, Paraskevopoulos Konstantinos M., Zorba Triantafyllia T., Savić Slavica M., Ristić Momčilo M., "Far infrared reflectance of sintered Zn2TiO4" Journal of Materials Science, 43, no. 16 (2008):5564-5568,
https://doi.org/10.1007/s10853-008-2819-3 .
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