Process for the preparation of silicon nitride low in carbon con

Details Process for the preparation of silicon nitride low in carbon con Process for the preparation of silicon nitride low in carbon con

1986-10-06

1989-01-17

Doll, John

Chemistry of inorganic compounds

Silicon or compound thereof

Binary compound

423406, C01B 21063, C01B 3306

Patent

active

047987146

ABSTRACT:
An improved process for preparation of silicon nitride powder having a low carbon content comprises treating silicon nitride powder with an atmosphere containing chlorine gas at temperatures from 600.degree. to 1050.degree. C. and then with an atmosphere containing gaseous oxygen.

REFERENCES:
patent: 4122152 (1978-10-01), Mori et al.
patent: 4428916 (1979-09-01), Komeya et al.
patent: 4572902 (1986-02-01), Matano et al.
Chemical Abstracts, Book 98, No. 8, Feb. 21, 1983.
Chemical Abstracts, Book 104, No. 4, Jan. 27, 1986.
Chemical Abstracts, Book 100, No. 26, Jun. 25, 1984.

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