Silicon nitride sintered body and manufacturing method thereof

Details Silicon nitride sintered body and manufacturing method thereof Silicon nitride sintered body and manufacturing method thereof

1986-08-04

1987-09-08

Lechert, Jr., Stephen J.

Compositions: ceramic

Ceramic compositions

Refractory

264 65, 264125, 501 98, 501104, 501105, 501118, 501123, 501127, 501152, 501153, C04B 3558

Patent

active

046924191

ABSTRACT:
A silicon nitride sintered body essentially consisting of compounds of Sr, Mg, Ce, Zr and Al in amounts of from 0.1 to 18% by weight when calculated as SrO, from 0.2 to 25% by weight when calculated as MgO, from 0.1 to 20% by weight when calculated as CeO.sub.2, from 0.1 to 15% by weight when calculated as ZrO.sub.2 and from 1 to 20% by weight when calculated as Al.sub.2 O.sub.3, respectively, and the balance being silicon nitride. A method of manufacturing the silicon nitride sintered body is also disclosed. The silicon nitride sintered body has a low thermal conductivity while high mechanical strength and high fracture toughness being maintained.

REFERENCES:
patent: 4134947 (1979-01-01), Oda et al.
patent: 4218257 (1980-08-01), Oda et al.
patent: 4376742 (1983-03-01), Mah
patent: 4535063 (1985-08-01), Matsuhiro et al.
patent: 4609633 (1986-09-01), Fukuhara et al.

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