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

1978-04-14

1979-06-12

Arnold, Donald J.

Abrasive tool making process, material, or composition

With inorganic material

Metal or metal oxide

51295, 51298, 51308, C09K 314, B24D 1100

Patent

active

041578988

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% titaniun, 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.

REFERENCES:
patent: 3181939 (1965-05-01), Marshall
patent: 3216794 (1965-11-01), Roschuk
patent: 3387957 (1968-06-01), Howard
patent: 3615307 (1971-10-01), Jones
patent: 3861849 (1975-01-01), Richmond et al.
patent: 3996702 (1976-12-01), Leahy
patent: 4049397 (1977-09-01), Bockstiegel et al.

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