Fused aluminum oxide abrasive grain containing reduced titanium

Details Fused aluminum oxide abrasive grain containing reduced titanium Fused aluminum oxide abrasive grain containing reduced titanium

1980-09-02

1983-01-18

Derrington, James H.

Abrasive tool making process, material, or composition

With inorganic material

Metal or metal oxide

51295, 51298, 51307, 264 65, 264 66, C09K 314

Patent

active

RE0311286

ABSTRACT:
A fused abrasive grain, useful for inclusion in coated abrasives and bonded abrasives, consists essentially of alumina; titanium oxide containing from about 0.42 to about 0.84% titanium, by weight of the abrasive grain, present as a reduced titanium oxide having an average oxidation state lower than in Ti.sub.2 O.sub.3 ; from about 0.05 to about 0.3% by weight carbon; from about 0.02 to about 0.1% by weight Na.sub.2 O; and from 0 to about 0.1% by weight total of calcium and silicon oxides. The grain before roasting has a gain on ignition of from about 0.4 to about 0.7% by weight, and is produced in an electric furnace by fusing high-purity titania, alumina containing Na.sub.2 O as the only significant oxide impurity, and carbon, followed by crushing and roasting the fused grain.

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