Patent ID: 7553788
Filing Date: 2009-06-30
Classification: C04B

Abstract:
1. A process for producing an aluminum nitride sintered body, comprising the steps of: molding a mixture comprising 100 parts by weight of an aluminum nitride powder and between 2 parts by weight and 20 parts by weight of a sintering additive of an alkaline earth group based oxide to create a molded product; sintering the molded product at a temperature of between 1500 and 2000° C. for between 3 and 200 hours in a reducing atmosphere in order to obtain a raw material sintered body; and annealing the raw material sintered body at a temperature of between 1600 and 2000° C. for between 1 and 200 hours in the presence of an aluminum compound which is stably present at a temperature of not lower than 1000° C. and liberates an aluminum based gas.