IMPROVED ABRASIVES BY CONCURRENT FIRE-COMMINUTING AND SINTERING OF SOL-GEL ALUMINA

摘要

Sol-gel alumina that is dried but unfired can be explosively comminuted by feeding the dried gel into a furnace held at temperatures above those at which vaporizable materials are eliminated from the particles of gel. At suitably elevated temperatures the firing is sufficient to form fully densified alpha alumina particles of a size suitable for direct use as abrasive grits.