Abrasive grits formed of ceramic, impregnation method of making

Compositions: ceramic – Ceramic compositions – Refractory

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501 1, 501 12, 501105, 501152, 501153, 51295, 51298, 51309, C04B 3510

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053127897

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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