Japan As Represented by Director General of Agency of Industrial Science

Fine Ceramics Research Association

Hisayuki Imamura

Motohiro Toriyama

Syuzo Kanzaki

Kiyoshi Hirao

Yasuhiro Shigegaki

Manuel E Brito

Takene Hirai

The present invention relates to a method for producing a porous silicon nitride sintered body having high strength and low thermal conductivity, which comprises of adding more than 10 volume % of rodlike beta-silicon nitride single crystals with a larger mean diameter than that of a silicon nitride raw powder into a mixture comprising the silicon nitride raw powder and a sintering additive, preparing a formed body with rodlike beta-silicon nitride single crystals oriented parallel to the casting plane according to a forming technique such as sheet casting and extrusion forming, sintering said formed body to develop elongated silicon nitride grains from the added rodlike beta-silicon nitride single crystals as nuclei and obtain the sintered body with the elongated grains being dispersed in a complicated state.

Method of producing porous silicon nitride ceramics having high strength

Growing community of inventors

Aichi, Japan

Hisayuki Imamura