... chemical ingredient Al2O3, its content is between 94.5% and 97%, and the other containing a small amount of Fe, Si, Ti ... it are fit grind materials of all kinds, such as universal steel and gerveral alloy stell. It can be used to forge ... alloys, ceramics, iron-smelting furnace of the lining (walls and tubes); physical and chemical containers , spark plugs, heat-resistant anti-oxidation coating ...