Formation kinetics and cation inversion in mechanically activated MgAl2O4 spinel ceramics
Authors
Obradović, Nina
Fahrenholtz, William G.

Filipović, Suzana

Marković, Smilja

Blagojević, Vladimir A.

Lević, Steva

Savić, Slobodan
Đorđević, Antonije

Pavlović, Vladimir B.

Article (Accepted Version)
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Solid-state mechanical activation of MgO and α-Al2O3 powders was used to produce MgAl2O4. The cation site occupancy in the resulting MgAl2O4 spinel was investigated using different methods. Differential thermal analysis and thermal gravimetry showed that mechanical activation reduced the spinel formation temperature by around 200 °C, and the corresponding activation energy by about 25%. In addition, characteristic temperatures for evaporation of physisorbed water and decomposition of Mg(OH)2 shifted to lower values, and peaks were more pronounced. Raman spectra were used to characterize the degree of inversion as a function of the sintering temperature for all of the sintered specimens, indicating that the breaking point for ordering of the crystal structure was around 1500 °C for non-activated samples, and 1400 °C for activated samples.
Source:
Journal of Thermal Analysis and Calorimetry, 2020, 140, 95-107Publisher:
- Springer
Funding / projects:
Note:
- This is the peer-reviewed version of the article: Obradović, N., Fahrenholtz, W.G., Filipović, S., Marković, S., Blagojević, V., Lević, S., Savić, S., Đorđević, A., Pavlović, V., 2019. Formation kinetics and cation inversion in mechanically activated MgAl2O4 spinel ceramics. J Therm Anal Calorim. 140: 95-107. https://doi.org/10.1007/s10973-019-08846-w
- Published version: https://hdl.handle.net/21.15107/rcub_dais_10027
Related info:
- Version of
http://dx.doi.org/10.1007/s10973-019-08846-w - Version of
https://hdl.handle.net/21.15107/rcub_dais_10027
DOI: 10.1007/s10973-019-08846-w
ISSN: 1588-2926
WoS: 000520712700006
Scopus: 2-s2.0-85074007393
Institution/Community
Институт техничких наука САНУ / Institute of Technical Sciences of SASATY - JOUR AU - Obradović, Nina AU - Fahrenholtz, William G. AU - Filipović, Suzana AU - Marković, Smilja AU - Blagojević, Vladimir A. AU - Lević, Steva AU - Savić, Slobodan AU - Đorđević, Antonije AU - Pavlović, Vladimir B. PY - 2020 UR - https://dais.sanu.ac.rs/123456789/6910 AB - Solid-state mechanical activation of MgO and α-Al2O3 powders was used to produce MgAl2O4. The cation site occupancy in the resulting MgAl2O4 spinel was investigated using different methods. Differential thermal analysis and thermal gravimetry showed that mechanical activation reduced the spinel formation temperature by around 200 °C, and the corresponding activation energy by about 25%. In addition, characteristic temperatures for evaporation of physisorbed water and decomposition of Mg(OH)2 shifted to lower values, and peaks were more pronounced. Raman spectra were used to characterize the degree of inversion as a function of the sintering temperature for all of the sintered specimens, indicating that the breaking point for ordering of the crystal structure was around 1500 °C for non-activated samples, and 1400 °C for activated samples. PB - Springer T2 - Journal of Thermal Analysis and Calorimetry T1 - Formation kinetics and cation inversion in mechanically activated MgAl2O4 spinel ceramics SP - 95 EP - 107 VL - 140 DO - 10.1007/s10973-019-08846-w UR - https://hdl.handle.net/21.15107/rcub_dais_6910 ER -
@article{ author = "Obradović, Nina and Fahrenholtz, William G. and Filipović, Suzana and Marković, Smilja and Blagojević, Vladimir A. and Lević, Steva and Savić, Slobodan and Đorđević, Antonije and Pavlović, Vladimir B.", year = "2020", abstract = "Solid-state mechanical activation of MgO and α-Al2O3 powders was used to produce MgAl2O4. The cation site occupancy in the resulting MgAl2O4 spinel was investigated using different methods. Differential thermal analysis and thermal gravimetry showed that mechanical activation reduced the spinel formation temperature by around 200 °C, and the corresponding activation energy by about 25%. In addition, characteristic temperatures for evaporation of physisorbed water and decomposition of Mg(OH)2 shifted to lower values, and peaks were more pronounced. Raman spectra were used to characterize the degree of inversion as a function of the sintering temperature for all of the sintered specimens, indicating that the breaking point for ordering of the crystal structure was around 1500 °C for non-activated samples, and 1400 °C for activated samples.", publisher = "Springer", journal = "Journal of Thermal Analysis and Calorimetry", title = "Formation kinetics and cation inversion in mechanically activated MgAl2O4 spinel ceramics", pages = "95-107", volume = "140", doi = "10.1007/s10973-019-08846-w", url = "https://hdl.handle.net/21.15107/rcub_dais_6910" }
Obradović, N., Fahrenholtz, W. G., Filipović, S., Marković, S., Blagojević, V. A., Lević, S., Savić, S., Đorđević, A.,& Pavlović, V. B.. (2020). Formation kinetics and cation inversion in mechanically activated MgAl2O4 spinel ceramics. in Journal of Thermal Analysis and Calorimetry Springer., 140, 95-107. https://doi.org/10.1007/s10973-019-08846-w https://hdl.handle.net/21.15107/rcub_dais_6910
Obradović N, Fahrenholtz WG, Filipović S, Marković S, Blagojević VA, Lević S, Savić S, Đorđević A, Pavlović VB. Formation kinetics and cation inversion in mechanically activated MgAl2O4 spinel ceramics. in Journal of Thermal Analysis and Calorimetry. 2020;140:95-107. doi:10.1007/s10973-019-08846-w https://hdl.handle.net/21.15107/rcub_dais_6910 .
Obradović, Nina, Fahrenholtz, William G., Filipović, Suzana, Marković, Smilja, Blagojević, Vladimir A., Lević, Steva, Savić, Slobodan, Đorđević, Antonije, Pavlović, Vladimir B., "Formation kinetics and cation inversion in mechanically activated MgAl2O4 spinel ceramics" in Journal of Thermal Analysis and Calorimetry, 140 (2020):95-107, https://doi.org/10.1007/s10973-019-08846-w ., https://hdl.handle.net/21.15107/rcub_dais_6910 .