High temperature alumina +Chemical Composition: Al2O3 α-Al2O3 SiO2 Fe2O3 Na2O Loss on ignition True specific gravity ≥99% ≤95% ≤0.10% ≤0.03% ≤0.12% ≤0.15% ≥3.95% +Properties of product:    This product is white powder or fine sand like, has stable high temperature property. It is hard to dissolve in strongly acid solution and strongly alkaline solution. Has good agglomeration property. +Main Use: It is the main raw material for the high alumina refractory, electric porcelain parts of apparatus, grinding and polishing products.