Methods of preparing sintered shapes and green shapes used there

Details Methods of preparing sintered shapes and green shapes used there Methods of preparing sintered shapes and green shapes used there

1991-11-22

1993-12-07

Kight, III, John

Stock material or miscellaneous articles

Composite

Of addition polymer from unsaturated monomers

4284111, 252 334, 264 44, 264 63, 264 65, 264 66, 501 1, 419 19, 419 30, 419 31, 419 36, 419 37, B32B 2732

Patent

active

052682331

ABSTRACT:
The invention relates to a method of preparing sintered shapes, comprising the steps of forming a green body from a mixture comprising (A) a major amount of at least one inorganic powder with (B) at least one reaction product of an amine other than an alkanolamine with a hydrocarbyl-substituted carboxylic acylating agent or alkylalkyleneglycolacetic acylating agent; provided the reaction product is other than an alkylene oxide treated fatty monocarboxylic amide and provided that when the hydrocarbyl-substituted carboxylic acylating agent is a nonaromatic acylating agent, then the hydrocarbyl group is other than hydrocarbyl groups having an average of about 55 to about 110 carbon atoms; and sintering the body. Sintered shapes made from the methods of the present invention have relatively high fired densities and small uniform grain sizes; and low porosity. The reaction products of the present invention help disperse the inorganic powder. These reaction products improve deagglomeration of the inorganic powder and help prevent reagglomeration of the powder.

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Dispersion of Ceramic Particles in Organic Liquids Mat. Res. Symp. Proc. vol. 73 (1986).
Materials Resource Society Dispersions of Ceramic Powders in Organic Media, Advances in Ceramics, vol. 21: Ceramic Powder Science Copyright 1987.
The American Ceramic Society, Inc. pp. 411-415 Dispersants in Ceramics Processing British Ceramics Proceedings published by British Ceramics Society vol. 37 (1986) pp. 249-253.
Tape Casting: The Basic Process for Meeting the Needs of the Electronics Industry Ceramic Bulletin, vol. 69, No. 6, 1990 pp. 1022-1026, by R. Mistler.

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