Pingxiang Baisheng Chemical Packing Co

1. Physical Properties 　　Water absorption ≤2 % 　　Acid resistance ≥98 % 　　Alkali resistance ≥80 % 　　Thermal resistance ≥1300 ℃ 　　Roundness (Dmax/Dmin) < 1.25 　　Volume 40~50 % 　　Material density 2.2~2.4 g/cm3 　　BET-surface < 0.1 m2/g 　　Expansion coefficient 4.7 x 10-6 L/K 　　Spec. thermal energy ~0.84 kJ/(kg.K) 　　Thermal conductivity ~0.63 m. h.K 　　Mohs-hardness ~8 Mohs 2. Chemical Composition Al2O3 >23 % SiO2 67~69 Al2O3+SiO2≥90 % Fe2O3 ≤1 %