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US 4,287,164 AGranted
Process for producing cubic system boron nitride
AssigneeNational Institute for Researches in Inorganic Materials
InventorsTadashi Endo, Osamu Fukunaga, Minoru Iwata
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Abstract
A process for producing cubic system boron nitride comprises contacting calcium or strontium boron nitride with hexagonal system boron nitride and heating at higher than 1,450.degree. C. under the thermodynamically stable pressure for cubic system boron nitride.
Claims7
A process for producing cubic system boron nitride which comprises contacting calcium or strontium boron nitride with hexagonal system boron nitride and heating at higher than 1,450.degree. C. under the thermodynamically stable pressure for cubic system boron nitride.
Dependencies are inferred from the claim text.