Method of producing .beta.-sialon fine powder

Details Method of producing .beta.-sialon fine powder Method of producing .beta.-sialon fine powder

1989-12-22

1991-01-08

Straub, Gary P.

Chemistry of inorganic compounds

Silicon or compound thereof

Oxygen containing

423344, 423385, 423625, 423 97, 423 98, C01B 3326, C01B 21068, C01B 3306, C04B 3558

Patent

active

049833685

ABSTRACT:
A method of producing a .beta.-sialon fine powder which comprises using a silane compound represented by the general formula of SiH.sub.x Cl.sub.4-x (0.ltoreq.x.ltoreq.4) as a Si source, aluminum chloride as an Al source and an ether represented by the general formula of ROR' (R,R'=C.sub.y H.sub.2y+1, 1.ltoreq.y.ltoreq.5) as an oxygen source respectively, dissolving them in an organic solvent capable of dissolving them to obtain a solution, introducing ammonia gas into the solution to produce a precipitates, and burning the precipitates in a nonoxidative atmosphere. In the .beta.-sialon fine powder obtained by the method of the invention, respective elements of Si, Al, O and N are uniformly distributed in a chemical viewpoint. A high density high strength sintered body can be produced even at a relatively low temperature by using the .beta.-sialon fine powder.

REFERENCES:
patent: 4172108 (1979-10-01), Maeda
patent: 4731236 (1988-03-01), Murakawa et al.
Derwent Accession, No. 86-39 595, Questel Telesystems (WPIL), Derwent Publications, Ltd., London.

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