Preparation of silicon nitride powder

Details Preparation of silicon nitride powder Preparation of silicon nitride powder

1988-05-19

1989-08-22

Doll, John

Chemistry of inorganic compounds

Silicon or compound thereof

Binary compound

423413, 423470, 423471, 427213, C01B 21063, C01B 3306, B05D 700

Patent

active

048594431

ABSTRACT:
Silicon nitride powder is prepared in a gas-phase reaction by reacting silicon tetrachloride with ammonia at above 500.degree. C. in a fluidized bed of silicon nitride particles. An amorphous silicon nitride having a BET specific surface area of greater than 50 m.sup.2 /g is used at the beginning of the reaction. The resulting silicon nitride is then separated from the ammonium chloride simultaneously formed.

REFERENCES:
patent: 4196178 (1980-04-01), Iwai et al.
patent: 4505720 (1985-03-01), Gabor et al.
patent: 4619905 (1986-10-01), Natansohn et al.

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