... China 4.SGS, ISO certificate White Fused PowderActive Alumina Powder specification & parameter ApplicationModelAl2O3 Na2OFe2O3SiO2True Densitya-Al2O3D50 Unit ... resist Corrision.Taking the superior industrial alumina as raw material, Calcined Alumina is produced through the method ... resistance and corrosion-resistance products, such as high-alumina refractory, high level ceramic products, car used ...