... aluminum oxide for refractories 2.good thermal stability 3 high corrosion resistance 4.raw material for polishing and gri basic raw material for ... , such as high- alumina refractories, equipments and tools for polishing and grinding, spark plug, electroceramics, and senior ... of products such as refractory material, alumina, aluminum hydroxide, high temperature aluminum oxide and white corundum, etc. It ...