Parmida Refractory Ceramic Co. (PRC) is supplier of fused aluminum oxide. fused alumina is widely used as a raw material in refractories, ceramics shapes, grinding wheels, sandpaper, blasting media, coatings, polishing, grinding and hundreds of other applications,. Fused alumina grains and powders are available in standard grit and powder sizes and they can also be made to individual specifications.