Compositions: ceramic – Ceramic compositions
Patent
1992-07-28
1994-07-19
Langel, Wayne
Compositions: ceramic
Ceramic compositions
423278, C01B 3510, C04B 3500
Patent
active
053309375
ABSTRACT:
A superhard form of boron suboxide comprises at least about 95% by weight B.sub.6 O and has a KNH.sub.100 value of at least about 3800 kg/mm.sup.2. In a preferred embodiment, the boron suboxide has an average grain size of about 0.1-40 microns. A method for forming the superhard boron suboxide comprises mixing boron oxide (B.sub.2 O.sub.3) and boron powder and subjecting the mixture to a temperature of 1500.degree. C. to about 2,200.degree. C. and a pressure sufficient to produce the superhard boron suboxide. The superhard boron suboxide may be made by this method with or without a sintering aid being present in the mixture of boron and boron oxide.
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Csillag Frank
Ellison-Hayashi Cristan
Kuo Peter
Shetty Dinesh K.
Yeckley Russell
Kolkowski Brian
Langel Wayne
Norton Company
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