Method for manufacture of silicon nitride

Details Method for manufacture of silicon nitride Method for manufacture of silicon nitride

1981-08-18

1983-08-02

Cooper, Jack

Chemistry of inorganic compounds

Silicon or compound thereof

Binary compound

423406, C01B 21068

Patent

active

043965873

ABSTRACT:
Silicon nitride of improved quality is obtained by using a liquid silicic acid or modified liquid silicic acid as a silicic substance and carbon in a powdered form, a precursor of carbon in a powdered form, or a precursor of carbon in the form of a solution as a carbonaceous substance, and thermally treating these raw materials in a non-oxidative atmosphere containing nitrogen. By this method, .alpha.-type silicon nitride can be easily obtained. Particularly, finely divided .alpha.-type silicon nitride suitable for use as the raw material for the production of high-strength sintered articles is also produced. .alpha.-type silicon nitride whiskers useful as a reinforcing material for ceramic and metallic articles is also obtained.

REFERENCES:
patent: 3085863 (1963-04-01), Prener
patent: 3379647 (1968-04-01), Smudski
patent: 3399979 (1968-09-01), Hamling
patent: 4117095 (1978-09-01), Komeya et al.
patent: 4122152 (1978-10-01), Mori et al.
patent: 4264565 (1981-04-01), Inoue et al.

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