calcined alumina(ceramics grade) size:0.5-5um, 325-800mesh purity:99% mi Calcined Alumina,(ceramics ... (%)minAverage particaleD50(μm) BH-C BH-C1Al2O3,99.70minSiO2, 0.05maxFe2O3,0.03maxNa2O,0.80max 3.97 96 3-5BH-C23.96952-4BH ... ,3,5,um, 800,500,325meshActive Alumina2,3,4um,325mesh,0.4,0.6,0.8,1umCeramics Alumina calcined alumina(ceramics grade)