Sintered silicon nitride body and a method of producing the same

Details Sintered silicon nitride body and a method of producing the same Sintered silicon nitride body and a method of producing the same

1976-04-02

1979-01-16

White, Robert F.

Plastic and nonmetallic article shaping or treating: processes

Including step of generating heat by friction

106 735, C04B 3558

Patent

active

041349474

ABSTRACT:
A sintered silicon nitride body consists of not more than 10% by weight in total of at least two metal oxides selected from the group consisting of beryllium oxide, magnesium oxide and strontium oxide (provided that each of the metal oxides is not more than 5% by weight) and the remainder of silicon nitride and may further contain not more than 10% by weight of at least one rare earth metal oxide, and is produced by preparing a mixture having the said composition range and then molding and sintering it at 1,600.degree.-1,900.degree. C in nitrogen or inert gas atmosphere.

REFERENCES:
patent: 3549402 (1970-12-01), Whitney et al.
patent: 3950464 (1976-04-01), Masoki
patent: 3992497 (1976-11-01), Terwilliger et al.
patent: 4073845 (1978-02-01), Buljan et al.
Mazdiyasni et al., "Consolidation, Microstructural, and Mechanical Property of Si.sub.3 N.sub.4 Doped with Rare-Earth Oxides," J. Am. Chem. Soc., Dec. 1974, pp. 536-537.

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