Boron suboxide material and method for its preparation

Details Boron suboxide material and method for its preparation Boron suboxide material and method for its preparation

1991-07-12

1992-08-04

Langel, Wayne

Compositions: ceramic

Ceramic compositions

423278, C01B 3510, C04B 3500

Patent

active

051358921

ABSTRACT:
A superhard form of boron suboxide (B.sub.x O) comprises at least about 95% by weight of polycrystalline B.sub.6 O and has a KHN.sub.100 value of at least about 3800 kg/mm.sup.2. A method for forming the superhard boron suboxide comprises mixing stoichiometric amounts of boron oxide (B.sub.2 O.sub.3) powder and boron powder and subjecting the mixture to a temperature of about 1800.degree. C. to about 2200.degree. C. and a pressure of about 2,000 to about 6,000 psi while encapsulated by boron nitride. The boron powder comprises about 90 to 95% by weight of elemental boron (B), and at least about 1% by weight of a sintering aid, such as Mg.

REFERENCES:
patent: 1105388 (1914-07-01), Weintraub
patent: 3660031 (1972-05-01), Holcombe, Jr. et al.

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