Process for producing green compacts by molding sinterable ceramic mixtures based on silicon nitride
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United States of America Patent
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Nov 13, 1990
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N/A
app pub date -
Jul 5, 1989
filing date -
Jul 21, 1988
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Expired
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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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