Ceramic powder useful in the manufacture of green and densified

Details Ceramic powder useful in the manufacture of green and densified Ceramic powder useful in the manufacture of green and densified

1991-12-16

1993-12-28

Group, Karl

Compositions: ceramic

Ceramic compositions

Refractory

501 98, 428403, 428404, C04B 3558

Patent

active

052739422

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 is described. The method 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: 4279654 (1981-07-01), Yajima et al.
patent: 4814128 (1989-03-01), Lieberman et al.
patent: 4816428 (1989-03-01), Kishi et al.
patent: 4834928 (1989-05-01), Su

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