Process for preparing sintered shapes and compositions used ther

Details Process for preparing sintered shapes and compositions used ther Process for preparing sintered shapes and compositions used ther

1995-04-05

1996-06-18

Nutter, Nathan M.

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

055276245

ABSTRACT:
The invention relates to a process for preparing sintered shapes, comprising the steps of:
(1) forming a green body from a mixture comprising a major amount of at least one inorganic powder; and one or more additives selected from the group consisting of: (A) at least one reaction product of a hydroxy compound with a carboxylic acylating agent; (B) at least one Mannich reaction product; (C) at least one hydrocarbyl-substituted amine; (D) at least one aminophenol; (E) at least one reaction product of a nitrophenol and amino compound; (F) at least one basic nitrogen-containing polymer; (G) at least one carboxylic acylating agent; (H) at least one aromatic acid or derivative thereof; (I) at least one aromatic oxime; and (J) at least one overbased or gelled overbased metal salt of an acidic organic compound provided that when the carboxylic acylating agent is a hydrocarbyl-substituted carboxylic acylating agent and the hydrocarbyl group contains less than an average of 40 carbon atoms, then the carboxylic acylating agent is a polycarboxylic acylating agent; and
(2) sintering the body. Sintered shapes made from the compositions of the present invention have relatively high fired densities and grain sizes; and relatively low pore volume.

REFERENCES:
patent: 4448609 (1984-05-01), Tear et al.
patent: 4981602 (1991-01-01), Ripple et al.
patent: 5268233 (1993-12-01), Heller et al.
Dispersion of Ceramic Particles in Organic Liquids, Mat. Res. Soc. Symp. Proc. vol. 73 (1986) Materials Research 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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