公开(公告)号：US4111668A

公开(公告)日：1978-09-05

申请号：US691817

申请日：1976-06-01

申请人： Thomas Bruce Walker ,  Robert J. Seider ,  Paul Cichy

发明人： Thomas Bruce Walker ,  Robert J. Seider ,  Paul Cichy

IPC分类号： B24D3/28 ,  C01F7/02 ,  C09K3/14

CPC分类号： C09K3/1427 ,  B24D3/285

摘要： 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.