SUPERIOR HIGH SODIUM AND CALCIUM SOL GEL ABRASIVE AND PROCESS FOR ITS PRODUCTION

摘要

SUPERIOR HIGH SODIUM AND CALCIUM SOL GEL ABRASIVE AND PROCESS FOR ITS PRODUCTION A process for forming an abrasive grain from a sol gel which contains aluminum oxide monohydrate, a dissolved metal containing sintering aid and from above about .05 to about 1.8 weight percent sodium plus calcium, provided that the weight percent calcium is from 0 to about 1.8 and the weight percent sodium is from 0 to about .4. The high sodium and calcium is permitted due to rapid heating of the sol gel after drying through a temperature range of from below about 800.degree.C to above about 1200.degree.C, prior to sintering the dried gel at a temperature above 1200.degree.C. A grain made by the process and coated, bonded and non-woven abrasive articles comprising the grain.