Mold release agent for ceramic molds used in ceramic slip casting processes

A mold release agent is provided which is compatible for use with slip casting molds formed from alumina, which are more durable than conventional gypsum molds. The preferred mold release agent is a suspension whose suspended solid matter is water-insoluble, organic, and composed of fine natural or...

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Bibliographic Details
Main Author LEE; HOWARD H.-D
Format Patent
LanguageEnglish
Published 22.02.1994
Edition5
Subjects
ARTIFICIAL STONE
CEMENTS
CERAMICS
CHEMISTRY
COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS
CONCRETE
LIME, MAGNESIA
METALLURGY
REFRACTORIES
SLAG
TREATMENT OF NATURAL STONE
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Summary:A mold release agent is provided which is compatible for use with slip casting molds formed from alumina, which are more durable than conventional gypsum molds. The preferred mold release agent is a suspension whose suspended solid matter is water-insoluble, organic, and composed of fine natural or synthetic powders or fibers. The mold release agent forms a layer of particles and/or fibers on the mold cavity surface which promotes the ease by which the cast article can be removed from the alumina mold. The mold release agent is readily burned out during subsequent firing or sintering operations, so as not to leave an undesirable residue in the surface of the fired or sintered ceramic article. Furthermore, the mold release agent does not have an undesirable effect on the microstructure of the as-cast or sintered ceramic article, nor does its use result in any detectible surface or internal cracks in the as-cast or sintered ceramic article.
Bibliography:Application Number: US19920996532