Process for preparing a silicon nitride sintered body

Details Process for preparing a silicon nitride sintered body Process for preparing a silicon nitride sintered body

1986-11-18

1990-01-02

Dixon, Jr., William R.

Compositions: ceramic

Ceramic compositions

Refractory

501 98, 264 65, 264 66, C04B 3558

Patent

active

048913421

ABSTRACT:
Disclosed is a silicon nitride sintered body comprising 1 to 20% by weight as the oxide of a zirconium component and 1 to 10% by weight as the oxide of a yttrium component, with the balance being silicon nitride, in which the amount of excessive oxygen is 0 to 3% by weight based on the sintered body. This sintered body is obtained by sintering a starting material mixture comprising the above-mentioned three components in a nitrogen atomosphere controlled by SiO.sub.2 added to the stating material mixture or in a nitrogen atmosphere controlled by the co-presence of a mixture of metallic silicon and silica.

REFERENCES:
patent: 4304576 (1981-12-01), Hattori et al.
patent: 4535063 (1985-08-01), Matsuhiro et al.
patent: 4560669 (1985-12-01), Matsuhiro et al.
patent: 4628039 (1980-12-01), Mizutani et al.

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