... grade)PropertiesBrandsChemicalAnalysis(%)TrueDensity(g/cm3)minAlpha-Al2O3(%)minAverage particaleD50(μm) BH-C BH-C1Al2O3,99.70minSiO2, 0.05maxFe2O3,0.03maxNa2O,0.80max ... 3.97 96 3-5BH-C23.96952-4BH-C33.96962-33.9495<13 ... these partItemSizeCalcined AluminaAlpha-Al2O30.5,1,2,3,5,um, 800,500,325meshActive Alumina2,3,4um,325mesh,0.4,0.6,0 ...