Method of synthesizing cubic crystal structure boron nitride

Chemistry of inorganic compounds – Boron or compound thereof – Binary compound

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C01B 3508

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039594432

ABSTRACT:
A method of synthesizing cubic crystal structure boron nitride from hexagonal crystal structure boron nitride or other boron compound by subjecting the boron nitride or boron compound to a pressure of at least about 35,000 atmospheres and a temperature of at least about 1,000.degree.C in the presence of, as a catalyst, silicon, silicon nitride, a preformed silicon alloy or nitride thereof, or a silicon-and-aluminum-containing mixture.

REFERENCES:
patent: 3142595 (1964-07-01), Wentorf
patent: 3401019 (1968-09-01), Cowan et al.
patent: 3536447 (1970-10-01), Wakatsuki et al.
patent: 3667911 (1972-06-01), Balchan et al.
"Chemical Abstracts"; Vol. 78, 1973; p. 142, 99888r.

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