Method of manufacturing .beta. type silicon nitride whiskers

Details Method of manufacturing .beta. type silicon nitride whiskers Method of manufacturing .beta. type silicon nitride whiskers

1984-06-26

1985-06-04

Cooper, Jack

Chemistry of inorganic compounds

Silicon or compound thereof

Binary compound

423406, C01B 21068

Patent

active

045213933

ABSTRACT:
Silicon nitride whiskers having a long fiber length in which .beta. type silicon nitride is well developed are produced by reacting a mixture of silica, carbon and cryolite in the specific molar ratio in a mixed gas atmosphere of N.sub.2 and NH.sub.3 by heating the mixture at a temperature of 1,250.degree.-1,450.degree. C. Kira of a ceramic industry waste may be used in place of silica and in this case N.sub.2 alone is used as a nitriding atmosphere.

REFERENCES:
patent: 3244480 (1966-04-01), Johnson et al.
patent: 3394991 (1968-07-01), Evans
patent: 3413090 (1968-01-01), Krock et al.
patent: 4122152 (1978-10-01), Mori et al.
patent: 4428916 (1984-01-01), Komeya et al.

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