Sol gel abrasive containing reduced titania and process for its preparation

摘要

A method for forming a sol gel abrasive which comprises forming a gelled dispersion wherein the solids content in the dispersion comprises from 92 to 99 weight percent alumina or alumina precursor and 1 to 8 weight percent of a titanium oxide or titanium oxide precursor. The gelled dispersion is dried to form a dried gel and is heated to a temperature of from about 1225 DEG C to about 1500 DEG C. The heating is done in a gas atmosphere in a reducing environment to create a reduced titanium oxide in the finished abrasive product. The temperature range for a ten minute heating time may be determined by the formula DEG C = 1425 +/-75-20Tc where Tc is concentration of titanium oxide in weight percent solids. The product of the invention is a sol gel abrasive containing a reduced titanium oxide. The invention also includes the novel sol gel grain made by the method of the invention. <IMAGE>