High-purity ultra-fine alumina is white powder in appearance, with uniform particle size, low water storage capacity and stable chemical properties.This product is used as a raw material for high-alumina refractory materials, ceramic devices, spark plugs for automobiles, polishing and grinding, etc. It is a basic material for the production of high-aluminum amorphous refractory materials, and is a high-quality filler to enhance the performance of refractory products.