Method of producing cubic boron nitride

Details Method of producing cubic boron nitride Method of producing cubic boron nitride

1980-10-21

1982-09-14

Peters, G. O.

Chemistry of inorganic compounds

Boron or compound thereof

Binary compound

51307, C01B 3514

Patent

active

043495176

ABSTRACT:
Disclosed is a method of producing cubic boron nitride, which comprises the steps of subjecting to a pressure of from 40 to 70 kilobars and to a temperature of from 1100.degree. to 2000.degree. C. a charge including hexagonal boron nitride and a conversion initiator selected from the group consisting of alkali and alkaline earth metals and borides of the foregoing metals, doping the charge with crystallohydrate in the form of a compound selected from the group consisting of sulfur-, halogen- or nitrogen-containing salts and their mixtures incorporating at least 5 molecules of crystallization water. According to another embodiment, the aforesaid charge is doped with a member selected from the group consisting of alkali metal hydroxide or alkaline earth metal hydroxide.

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patent: 4016244 (1977-04-01), Susa et al.
Kobayashi et al, "Mat. Res. Bull.", vol. 10, 1975, pp. 1231-1236.

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