Silica Powder Introduction Silica powder has the advantages of excellent dielectric properties ,Low coefficient of thermal expansion, Complete chemical inertness and Neutral PH ,No chemical changes or induced reactions occur in either a catalyst or multicomponent.   ChangTong silica power co.Ltd??s high purity silica power is produced for the electronic materials area ,sealants, electronic potting compound area .Its dispersion leveling is excellent, contraction and Coefficient of thermal expansion are small, Acid alkali resistance ,solvent insulation,,mechanical performance, Mixed epoxy resin transparency are all good. In total ,our excellent silica power can save cost and improve effectiveness for you .   Silica Powder Properties Items Unit Typical testing value Moisture % 0.08 L.O.T. % 0.1 SiO2 % ã??99.6 Fe2O3 % 0.013 Al2O3 % 0.24 K2O % 0.003 CaO % 0.02 Na2O % 0.004 Mohs hardness 7 Density g/cm3 2.65 PH 6.5-7.0 whiteness ã??90 Oil Absorption (g/100g) 16-30 Melting point (??) 1730 Silica Powder Application Production Mesh witness Mons Performance Characteristics For silicon rubber use 1000-3500 ?¥ 95 7 1.Super White; 2.Extremely low moisture; 3.Good insulativity; 4.great reinforcing effect; For paint coating use 600-2500 ?¥ 95 7 1.High White; 2.Good Oil absorption,mix viscosity, dispersity, mobility; 3.Small angle of repose,rub resistance; For sealant use 800-2000 ?¥ 92 7 1.Moisture