Powder Specification: Al2O3 (% ) contains 90 ,92,95,97,99 Fe2O3 (≤ % ) 0.1, 0,1, 0.1, 0.1, 0.05 Water (less% ) all less 0.3 Lossen Density ( g/cm3 ) 0.95~1.2 Partcile Size (mesh) 60~300 Fire Temperature (centigrade) 1580 ,1620 ,1650 , 1700 ,1720 Fired Density (≥g/c m3 ) 3.50 ,3.62 ,3.65 ,3.70 ,3.85 Keep Warming Time (hour) 2 Ceramic Color White