Journal
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
Volume 27, Issue 1, Pages 343-350Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.jeurceramsoc.2006.03.003
Keywords
microwave processing; sintering; thermal conductivity; nitrides; SHS; AlN
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Sintering of the AlN powder synthesized by a combustion synthesis method, which was developed recently by the present authors, was studied by using a microwave sintering technique. A single mode microwave cavity was used and an insulation package with a simple configuration was developed. A high sintering temperature (1900 degrees C or higher) and a stable and uniform heating were readily achieved. A temperature measurement technique using a thermocouple with extrapolation was established to obtain the sintering temperature. A percent theoretical density of 99.5% and a thermal conductivity of 186 W/m K were obtained for a specimen which was sintered at 1900 degrees C with a soaking time of 30 min and 3 wt.% of Yl(2)O(3) added. The effects of sintering aid (i.e., Y2O3) and sintering temperature on densification, microstructure and thermal conductivity of the sintered specimens were investigated. (c) 2006 Elsevier Ltd. All rights reserved.
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