Fused aluminum oxide abrasive grain containing reduced...

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

B - Operations, Transporting

24

D

57/16

B24D 3/10 (2006.01) B24D 3/28 (2006.01) C09K 3/14 (2006.01)

Patent

CA 1074574

FUSED ALUMINUM OXIDE ABRASIVE GRAIN CONTAINING REDUCED TITANIUM OXIDE Abstract of the Disclosure 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 Ti2O3; from about 0.5 to about 0.3% by weight carbon; from about 0.02 to about 0.1% by weight Na2O; 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 con- taining Na2O as the only significant oxide impurity, and carbon, followed by crushing and roasting the fused grain. -1-

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