Chemistry of inorganic compounds – Silicon or compound thereof – Binary compound
Patent
1994-07-12
1995-10-10
Langel, Wayne
Chemistry of inorganic compounds
Silicon or compound thereof
Binary compound
C01B 21068
Patent
active
054568960
ABSTRACT:
Silicon nitride powder is prepared by nitriding metallic silicon powder in a nitriding gas atmosphere at a temperature of 1,000.degree. C.-1,500.degree. C. Midway the nitriding step, the nitrided product is heat treated in an inert non-oxidizing gas atmosphere or vacuum at a temperature higher than the nitriding temperature, but lower than 1,600.degree. C. The product is nitrided again, obtaining high .alpha.-content silicon nitride powder.
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patent: 5032370 (1991-07-01), Merzhanov et al.
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Patent Abstracts of Japan, vol. 013, No. 501 (C-652) 10 Nov. 1989 & JP-A-01 201 012 (Japan Metals & Chem Co., Ltd.) 14 Aug. 1989.
European Patent Application 0410459A2 published Jan. 30, 1991.
Fukuhira Masanori
Fukuoka Hirofumi
Konya Yoshiharu
Watanabe Masaki
Langel Wayne
Shin-Etsu Chemical Co. , Ltd.
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