... white hot sale white fused alumina powder with different particle sizes as abrasive, precison casting, chemical refractory Application1.super ... industry like war industry, electron industry, etc.Specification Particle sizeChemical compositionAl2O3SiO2Fe2O3Na2OF20-F80≥99.2%≤0.05≤0.05≤ ... hot sale white fused alumina powder with different particle sizes as abrasive, precison casting, chemical refractory