Ngk Spark Plug Company, Limited

Agency of Industrial Science and Technology

Fine Ceramics Research Association

Kozo Iizuka, Director-general of Agency of Industrial Science and

Masayoshi Ohashi

Motohiro Toriyama

Syuzo Kanzaki

Kiyoshi Hirao

Hideyo Tabata

Shuzo Kanzaki

Masaaki Obata

Osami Abe

Koichi Moori

Tooru Shimamori

The present invention provides a method for producing an aluminum nitride sintered body having excellent characteristics and an aluminum nitride powder conveniently and inexpensively. The present invention relates to a method for production of an aluminum nitride sintered body comprising forming a metal aluminum power into a thin-plate like shape, heating the formed body to a temperature not exceeding the melting point of aluminum in a vacuum atmosphere, and then sintering it under N.sub.2 pressure (1-150 kg/cm.sup.2), and a method for production of an aluminum nitride powder comprising heating a metal aluminum powder to a temperature not exceeding the melting point of aluminum in a vacuum atmosphere, sintering it under N.sub.2 pressure (1-150 kg/cm.sup.2, and further cooling and pulverizing it.

Method for production of aluminum nitride sintered body and aluminum

A sintered silicon oxynitride composition comprises as an amount of starting material the combination of (a) a silicon component comprising silicon nitride(Si.sub.3 N.sub.4) and silicon oxide(SiO.sub.2) in a mol ratio of SiO.sub.2 /Si.sub.3 N.sub.4 being 0.7 to 1.2, and (b) at least one second component selected from an aluminum oxide, an aluminum nitride, a rare earth oxide, and a rare earth nitride, said second component being in an amount of from about 0.1 to 10 mol per 100 mol of said silicon component.

Sintered high density silicon oxnitride and method for making the same

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Aichi, Japan

Masayoshi Ohashi