Method of preparing ceramic powder and green and sintered articl

Details Method of preparing ceramic powder and green and sintered articl Method of preparing ceramic powder and green and sintered articl

1990-10-19

1992-04-07

Beck, Shrive

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

By mechanically introducing gas into material

264125, 427215, 427220, 501 97, C04B 3564

Patent

active

051025922

ABSTRACT:
A method of coating ceramic powders, e.g. Si.sub.3 N.sub.4, with a sintering aid and of utilizing such coated powders to form green and sintered ceramic bodies comprises treating a dispersion of the powder with a solution of a sintering aid forming compound at a pH such that the zeta potential of the ceramic powder is of opposite charge with respect to the sintering aid in solution such that the sintering aid forming material is chemisorbed as a uniform monomolecular layer on the surface of the ceramic powder.

REFERENCES:
patent: 4678761 (1987-07-01), Virkar et al.
patent: 4764490 (1988-08-01), Yamakawa et al.
patent: 4800051 (1989-01-01), Yan
patent: 4814128 (1989-03-01), Lieberman et al.
patent: 4834928 (1989-05-01), Su
patent: 4985379 (1991-01-01), Egerton et al.

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