Method for producing cubic boron nitride

Details Method for producing cubic boron nitride Method for producing cubic boron nitride

1995-06-07

1997-04-08

Langel, Wayne

Chemistry of inorganic compounds

Boron or compound thereof

Binary compound

C01B 21064

Patent

active

056185090

ABSTRACT:
hBN is converted to cBN by keeping it under temperature and pressure conditions within the range of stability of cubic boron nitride, in the presence of a mixture of at least two compounds selected from amides and imides of Li, Ca and Mg, or in its copresence with at least one metal selected from elements of Groups Ia, IIa, IIIa, VIa, VIIa, VIII, IIb and IIIb.

REFERENCES:
patent: 2947617 (1960-08-01), Wentorf
patent: 3661521 (1972-05-01), Birle
patent: 4148863 (1979-04-01), Farafontov et al.
patent: 5443605 (1995-08-01), Suzuki et al.
L.F. Vereshchagin et al., "Synthesis of Single Crystals of Cubic Boron Nitride in Systems Containing Hydrogen," Inorg. Mater. (USA), vol. 15, No. 2 (Feb. 1979), (published Jul., 1979), pp. 201-203.

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