Preparation of silicon nitride powder

Details Preparation of silicon nitride powder Preparation of silicon nitride powder

1990-07-24

1991-12-17

Chaudhuri, Olik

Chemistry of inorganic compounds

Silicon or compound thereof

Binary compound

422142, C01B 21068

Patent

active

050733583

ABSTRACT:
Silicon nitride powder is prepared by continuously supplying metallic silicon powder to a first fluidized bed which is composed of silicon nitride powder and a non-oxidizing reaction gas containing nitrogen or ammonia gas and maintained at 1,000.degree. to 1,400.degree. C. where primary nitriding reaction takes place, and continuously withdrawing the nitride product from the first fluidized bed and supplying it to a second fluidized bed of similar composition where secondary nitriding reaction takes place for nitriding the unreacted metallic silicon powder.

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