Boron nitride-containing material and method thereof

Details Boron nitride-containing material and method thereof Boron nitride-containing material and method thereof

1995-06-26

1997-05-27

Group, Karl

Compositions: ceramic

Ceramic compositions

Refractory

501 92, 501103, C04B 35583

Patent

active

056332149

ABSTRACT:
A boron-nitride-containing material of multi-component system is obtained at a low cost by heating a mixed powder containing a boride and an oxide in a nitrifying atmosphere, whereby a part or the whole of the oxide is reduced with the element bonded to boron of the boride to convert the raw materials to one or more kinds of an oxide having less bonded oxygen, an acid nitride, a nitride, a carbide, and a boride and also boron nitride is formed. A sintered product of a boron-nitride-containing material is obtained by packing a mixed powder containing borides in a heat-resistant mold and heating the packed powders in a nitrifying atmosphere while restraining the packed powders by the mold. The sintered product is obtained in which neither expansion nor deformation occurred and no cracks formed.

REFERENCES:
patent: 4107276 (1978-08-01), Schwetz et al.
patent: 5147623 (1992-09-01), Eun et al.
Database WPI, Week 9252, Derwent Publications Ltd., London, GB; AN 92-428946 of JP-A-04 325 461 (Hitachi Ltd), 13 Nov. 1992.

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