... 99.2% 4. size: F20-F1000 5. pure white hot sale white fused alumina powder with different particle sizes as abrasive, precison ... -tech industry like war industry, electron industry, etc.Specification Particle sizeChemical compositionAl2O3SiO2Fe2O3Na2OF20-F80≥99.2%≤0.05≤0.05≤0 ... products. hot sale white fused alumina powder with different particle sizes as abrasive, precison casting, chemical refractory