Microwave Sintering of Mullite-Al2O3 from Kaolin Precursor

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Author(s):	Reinoso Navarro, Lilian Cecilia ; Menezes, Romualdo Rodrigues ; Goldschmidt Aliaga Kiminami, Ruth Herta Total Authors: 3
Document type:	Journal article
Source:	MATERIALS RESEARCH-IBERO-AMERICAN JOURNAL OF MATERIALS; v. 17, n. 6, p. 6-pg., 2014-11-01.
Abstract
In the present work the effect of the microwave hybrid fast sintering of mullite-Al2O3 with non-stoichiometric mullite composition was investigated. Samples were fast sintered using a range of microwave power from 1.2 to 2.1 kW. The mullitization process of the silica-rich composition was faster than that of the alumina-rich composition. Alumina-rich mullite showed higher densities and smaller grain size than alumina-poor mullite. It was concluded that the microwave hybrid sintering of mullite was very sensitive to composition. (AU)