Sintered ceramic body

Details Sintered ceramic body Sintered ceramic body

1986-04-30

1987-12-15

Swisher, Nancy A.

Stock material or miscellaneous articles

Composite

Of inorganic material

428701, 428428, 4274197, 4274194, B32B 1504

Patent

active

047133023

ABSTRACT:
A sintered ceramic body has a surface layer containing yttrium silicate, cristobalite and silicon nitride, and mainly consists of silicon nitride. The silicon ceramic body is manufactured by preparing a composition containing a silicon nitride powder and an yttrium oxide powder, forming and sintering the composition, and heat-treating the sintered body in an oxidizing atmosphere. The ceramic body has a high mechanical strength over its entire surface and has little variation in mechanical strength.

REFERENCES:
patent: 3824120 (1974-07-01), Davidge et al.
patent: 3993844 (1973-11-01), Kiger et al.
patent: 4104442 (1978-08-01), Sussmuth
patent: 4234661 (1980-11-01), Lee et al.
patent: 4312899 (1982-01-01), Lahmann
patent: 4384909 (1983-05-01), Layden
patent: 4400427 (1983-08-01), Moschetti et al.
patent: 4406668 (1983-09-01), Sarin et al.
patent: 4613549 (1986-09-01), Tanaka
European Search Report dated May 17, 1984.
Chemical Abstracts, vol. 94, p. 328, No. 39106a.

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