Compositions: ceramic – Ceramic compositions – Refractory
Patent
1991-11-27
1992-11-17
Morris, Theodore
Compositions: ceramic
Ceramic compositions
Refractory
501 1, 501 12, 501105, 501152, 501153, 51295, 51298, 51309, C04B 3510
Patent
active
051643480
ABSTRACT:
Ceramic abrasive grits are formed by an impregnation process that involves preparing an alumina hydrate sol, drying the sol to form a porous solid, crushing the solid to produce particles, calcining the dried particles, preparing a mixture of an additive metal oxide or its precursor in a liquid vehicle, impregnating the mixture into the calcined particles, drying the impregnated particles, calcining the dried impregnated particles, and firing the particles to produce ceramic abrasive grits. The concentration of the modifying additive metal is greater at or near the surface of the grit than at the interior of the grit.
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Brunsman David M.
Francis Richard
Griswold Gary L.
Kirn Walter N.
Minnesota Mining and Manufacturing Company
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