Silicon nitride sintered bodies and a method of producing the sa

Details Silicon nitride sintered bodies and a method of producing the sa Silicon nitride sintered bodies and a method of producing the sa

1987-03-23

1989-04-04

Dixon, Jr., William R.

Compositions: ceramic

Ceramic compositions

Refractory

501 98, C04B 3558

Patent

active

048187330

ABSTRACT:
A silicon nitride sintered body having high oxidation resistance and high-temperature strength is produced by starting from silicon nitride powder adjusted so as to have an oxygen content of 4.5-7.5 wt % as converted into SiO.sub.2. The sintered body has a molar ratio of metal ion (M) to oxygen ion (O) within a range of M:O=1.2.about.1:3 and contains no crystal of YSiO.sub.2 N form.

REFERENCES:
patent: 4280973 (1981-07-01), Moskowitz et al.
Richerson, David W., "Modern Ceramic Engineering", pp. 153 and 170, 1982.

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