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Eduard Y Dovgal

Vladislav Sergeevich Lysanov

Alexei I Prikhna

Viktor V Digonsky

Leon Izrailevich Feldgun

Alexandr A Shulzhenko

Alexandr I Borimsky

Valerian D Yakimenko

Vyacheslav S Rovsha

Alexandr N Sokolov

Valery M Davidenko

Vitaly Y Egorov

Nikolai V Novikov

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.

Method of producing cubic boron nitride

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Saint-Petersburg, Russia

Eduard Y Dovgal