White Carbon Black (Silicon Dioxide)
Items, Technical Idex and Methods:
whiteness : Equal or Superior, HG/T3063-1999
SiO2 (%): ≥90, HG/T3062-1999
Loss on heating(%) 105℃ 2h: 3.0-8.0, HG/T3065-1999
Loss of ignition (Dried) 1000℃ 2h: 3.0-6.0, HG/T3066-1999
PH Value: 5.5-7.5, HG/T3067-1999
BET Specific surface m2/g: 145-260, HG/T3073-1999
DBP Oil-absorption(cm3/g): 2.0-3.5, HG/T3072-1999
Total ironcontent (mg/kg): ＜500, HG/T3070-1999
Character: White Amorphous Superfine Powder，Relative Density: 2.32-2.65，Melting Point: 1750℃, a low density, soluble in caustic soda and hydrofluoric acid, insoluble in other acids, water and solvent , high temperature resistant without combustion, a good water absorbability and electrical insulation.