Chakravorty, A K and Ghosh, D K (1988) Synthesis and 980-degrees-C phase development of some mullite gels. Journal of the American Ceramic Society, 71 (11). pp. 978-987. ISSN 0002-7820

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Abstract

Earlier works of mullitization through the gel route have been reviewed and the results show 980°C DTA and crystalline phases. Some Al2O3-SiO2 gels have been synthesized by using different precursors and by varying pH and water content during the gelification process. Thermal changes of these coherent gels were studied by DTA and X-ray powder diffractometry. The results demonstrate that two types of aluminosilicate gels form. The first type produces orthorhombic mullite directly on heating at 980°C, whereas the second type forms cubic mullite first at 980°C and then transforms to the orthorhombic variety on further heating. Lastly, the cause of the 980°C exotherm is explained with reference to kaolinite.

Item Type:	Article
Subjects:	Engineering Materials
Divisions:	Sol Gel
Depositing User:	Namita Dutta
Date Deposited:	08 Nov 2013 07:10
Last Modified:	06 Mar 2014 13:06
URI:	http://cgcri.csircentral.net/id/eprint/2195

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