Microwave Sintering of Sol-Gel Alumina—30 vol% SiC Particulate Composites
作者:
期刊:
Transactions of the Indian Ceramic Society
(Taylor Available online 1997)
卷期:
Volume 56,
issue 4
页码: 93-111
ISSN:0371-750X
年代: 1997
DOI:10.1080/0371750X.1997.10804803
出版商: Taylor & Francis
数据来源: Taylor
摘要:
Al2O3-SiC composite precursor has been made by dispersing fine SiC particles in a boehmite (AlOOH) matrix at pH 3.5 and slowly flocculating to pH 7.5 by dropwise addition of dilute NH4OH solution while the whole mixture was kept under constant stirring. The gel thus obtained is further dried under humid conditions and thermally dehydroxylated below 600°C. This precursor has been further subjected to microwaves having frequency 2.45 GHz and 600 W power under a “Picket Fencing” arrangement and sintered to reasonably higher densities. In a similar way, identical samples have been sintered in an electrical furnace up to 1450°C and the sintered properties are compared.
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