Crystallization behavior and sintering of cordierite synthesized by an aqueous sol-gel route
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2012
Authors
El-Buaishi, Nozhat MoftahJanković-Častvan, Ivona
Jokić, Bojan
Veljović, Đorđe
Janaćković, Đorđe
Petrović, Rada
Article (Published version)
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The purpose of the research was to investigate crystallization behavior and sintering of cordierite synthesized by a low-price aqueous sol gel route starting from silicic acid and magnesium and aluminum salts. Viscous sintering of the gel occurred in the temperature range of 800-850 degrees C, followed by mu-cordierite crystallization at about 900 degrees C, which proves the homogeneity of the gel. Decreasing of mu-cordierite crystallinity in a wide temperature range prior to commencing of alpha-cordierite crystallization at about 1200 degrees C indicates reconstructive type of mu- - gt alpha-cordierite transformation. The transformation was fully completed at 1350 degrees C. The value of the Avrami parameter indicates that mu-cordierite crystallization was controlled by surface or interface nucleation, which implies that viscous sintering occurred in the primary gel particles, which leads to shrinkage, and thereafter nucleation occurred on the surface or interface of the particles. T...he overall activation energy of mu-cordierite crystallization was 382.0 kJ/mol. The sinterability of the powder obtained by calcination at 1300 degrees C, where well-crystallized alpha-cordierite was formed, was better than that of the powder obtained by calcination at 850 degrees C, where the most intensive shrinkage occurred before the onset of crystallization of mu-cordierite.
Keywords:
sintering / Sol-gel process / Cordierite / CrystallizationSource:
Ceramics International, 2012, 38, 3, 1835-1841Publisher:
- Elsevier Sci Ltd, Oxford
DOI: 10.1016/j.ceramint.2011.10.008
ISSN: 0272-8842
WoS: 000301611700012
Scopus: 2-s2.0-84857063393
Institution/Community
Tehnološko-metalurški fakultetTY - JOUR AU - El-Buaishi, Nozhat Moftah AU - Janković-Častvan, Ivona AU - Jokić, Bojan AU - Veljović, Đorđe AU - Janaćković, Đorđe AU - Petrović, Rada PY - 2012 UR - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2199 AB - The purpose of the research was to investigate crystallization behavior and sintering of cordierite synthesized by a low-price aqueous sol gel route starting from silicic acid and magnesium and aluminum salts. Viscous sintering of the gel occurred in the temperature range of 800-850 degrees C, followed by mu-cordierite crystallization at about 900 degrees C, which proves the homogeneity of the gel. Decreasing of mu-cordierite crystallinity in a wide temperature range prior to commencing of alpha-cordierite crystallization at about 1200 degrees C indicates reconstructive type of mu- - gt alpha-cordierite transformation. The transformation was fully completed at 1350 degrees C. The value of the Avrami parameter indicates that mu-cordierite crystallization was controlled by surface or interface nucleation, which implies that viscous sintering occurred in the primary gel particles, which leads to shrinkage, and thereafter nucleation occurred on the surface or interface of the particles. The overall activation energy of mu-cordierite crystallization was 382.0 kJ/mol. The sinterability of the powder obtained by calcination at 1300 degrees C, where well-crystallized alpha-cordierite was formed, was better than that of the powder obtained by calcination at 850 degrees C, where the most intensive shrinkage occurred before the onset of crystallization of mu-cordierite. PB - Elsevier Sci Ltd, Oxford T2 - Ceramics International T1 - Crystallization behavior and sintering of cordierite synthesized by an aqueous sol-gel route EP - 1841 IS - 3 SP - 1835 VL - 38 DO - 10.1016/j.ceramint.2011.10.008 ER -
@article{ author = "El-Buaishi, Nozhat Moftah and Janković-Častvan, Ivona and Jokić, Bojan and Veljović, Đorđe and Janaćković, Đorđe and Petrović, Rada", year = "2012", abstract = "The purpose of the research was to investigate crystallization behavior and sintering of cordierite synthesized by a low-price aqueous sol gel route starting from silicic acid and magnesium and aluminum salts. Viscous sintering of the gel occurred in the temperature range of 800-850 degrees C, followed by mu-cordierite crystallization at about 900 degrees C, which proves the homogeneity of the gel. Decreasing of mu-cordierite crystallinity in a wide temperature range prior to commencing of alpha-cordierite crystallization at about 1200 degrees C indicates reconstructive type of mu- - gt alpha-cordierite transformation. The transformation was fully completed at 1350 degrees C. The value of the Avrami parameter indicates that mu-cordierite crystallization was controlled by surface or interface nucleation, which implies that viscous sintering occurred in the primary gel particles, which leads to shrinkage, and thereafter nucleation occurred on the surface or interface of the particles. The overall activation energy of mu-cordierite crystallization was 382.0 kJ/mol. The sinterability of the powder obtained by calcination at 1300 degrees C, where well-crystallized alpha-cordierite was formed, was better than that of the powder obtained by calcination at 850 degrees C, where the most intensive shrinkage occurred before the onset of crystallization of mu-cordierite.", publisher = "Elsevier Sci Ltd, Oxford", journal = "Ceramics International", title = "Crystallization behavior and sintering of cordierite synthesized by an aqueous sol-gel route", pages = "1841-1835", number = "3", volume = "38", doi = "10.1016/j.ceramint.2011.10.008" }
El-Buaishi, N. M., Janković-Častvan, I., Jokić, B., Veljović, Đ., Janaćković, Đ.,& Petrović, R.. (2012). Crystallization behavior and sintering of cordierite synthesized by an aqueous sol-gel route. in Ceramics International Elsevier Sci Ltd, Oxford., 38(3), 1835-1841. https://doi.org/10.1016/j.ceramint.2011.10.008
El-Buaishi NM, Janković-Častvan I, Jokić B, Veljović Đ, Janaćković Đ, Petrović R. Crystallization behavior and sintering of cordierite synthesized by an aqueous sol-gel route. in Ceramics International. 2012;38(3):1835-1841. doi:10.1016/j.ceramint.2011.10.008 .
El-Buaishi, Nozhat Moftah, Janković-Častvan, Ivona, Jokić, Bojan, Veljović, Đorđe, Janaćković, Đorđe, Petrović, Rada, "Crystallization behavior and sintering of cordierite synthesized by an aqueous sol-gel route" in Ceramics International, 38, no. 3 (2012):1835-1841, https://doi.org/10.1016/j.ceramint.2011.10.008 . .