1. Microwave sintering of AlN powder synthesized by a SHS method
- Author
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Hsieh, Cheng-Yu, Lin, Chun-Nan, Chung, Shyan-Lung, Cheng, Jiping, and Agrawal, Dinesh K.
- Subjects
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SINTERING , *POWDERS , *SELF-propagating high-temperature synthesis , *TEMPERATURE , *HEATING , *THERMOCOUPLES , *THERMAL conductivity , *MICROSTRUCTURE - Abstract
Abstract: 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°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 186W/mK were obtained for a specimen which was sintered at 1900°C with a soaking time of 30min and 3wt.% of Y2O3 added. The effects of sintering aid (i.e., Y2O3) and sintering temperature on densification, microstructure and thermal conductivity of the sintered specimens were investigated. [Copyright &y& Elsevier]
- Published
- 2007
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