Chemistry of inorganic compounds – Silicon or compound thereof – Binary compound
Patent
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.
BASF - Aktiengesellschaft
Doll John
Freeman Lori S.
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