The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 14, 1982
Filed:
Oct. 21, 1980
Vladislav S Lysanov, Leningrad, SU;
Viktor V Digonsky, Leningrad, SU;
Leon I Feldgun, Leningrad, SU;
Valery M Davidenko, Leningrad, SU;
Nikolai V Novikov, Kiev, SU;
Alexandr I Borimsky, Kiev, SU;
Alexandr A Shulzhenko, Kiev, SU;
Valerian D Yakimenko, Kiev, SU;
Eduard Y Dovgal, Leningrad, SU;
Vitaly Y Egorov, Leningrad, SU;
Vyacheslav S Rovsha, Leningrad, SU;
Alexei I Prikhna, Kiev, SU;
Alexandr N Sokolov, Kiev, SU;
Other;
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.