White Calcined Alumina for Ceramic, Refractory , Polishing and Paint Specifications 1. Manufacturer,calcined alumina 2.Al2O3:Generally 99.0%min or as your request 3.Usage: Ceramic, Refractory , Metallurgical , Grinding, Polishing, Paint etc 1. Ceramic grade category Al2O3 SiO2 Fe2O3 Na2O True density Powder 99.7 0.05 0.03 0.04 3.97 g/cm3 Micro Powder 99.7 0.08 0.03 0.04 3.97 g/cm3 2. Grinding and Polishing grade Model No. P78 P45 P34 P23 P12 P01 Grit size 7-8um 4-5um 3-4um 2-3um 1-2um 0.5um True density(g/cm3) 3.96 3.96 3.96 3.95 3.93 3.90 Mohs Hardness 9 Packing 25KG BAG + 1 MT BAG OR AS REQUEST 3. Refractory and Metallurgical grade Category Al2O3 SiO2 Fe2O3 Na2O True density Powder 99.0 0.10 0.05 0.1 3.96 g/cm3 Micro Powder 99.0 0.15 0.05 0.1 3.95 g/cm3 4. Paint grade Model No. Al2O3 (Min) SiO2 (Max) Fe2O3 (Max) Na2O (Max) Density A1301 99.0 0.10 0.03 0.08 3.95 g/cm3 A1402 99.6 0.08 0.03 0.05 3.90 g/cm3 Grit size Normal size or Produce according to your request