Process for producing green compacts by molding sinterable ceram

Details Process for producing green compacts by molding sinterable ceram Process for producing green compacts by molding sinterable ceram

1989-07-05

1990-11-13

Derrington, James

Plastic and nonmetallic article shaping or treating: processes

Removal of liquid component or carrier through porous mold...

264 63, 26421111, 2643282, C04B 3328, C04B 3330

Patent

active

049700367

ABSTRACT:
The invention relates to a process for producing green compacts by the slip-casting process, injection-molding process or extrusion process from sinterable mixtures based on a starting powder mixture containing silicon nitride, and, if appropriate, aluminum nitride and/or alumina and other oxides as sinter aids. The dispersant and binder used is a magnesium chloride hydrate as a mixture with magnesium oxide and water and, after molding, the mixtures are hardened at temperatures from 30.degree. to 60.degree. C. In addition, ceramic fibers, such as silicon carbide, can also be processed as fillers. The green compacts thus produced are sufficiently stable, so that they can be worked mechanically.

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Ceramic Powders, 1983-"Some Aspects of Slip Casting of Silicon Nitride and Silicon Carbide"-Persson et al, pp. 735-742.
Chemical Abs., vol. 108, 1988, 108: 80845r-Khater, et al, "Effects of Some Lignosulfonates Additives on Some . . . Panels".
Borregaard Inds. Ltd., N-1701-"Chemical and Physical Data on Borregaards Lignin Chemicals".

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