Item | Index |
SiO2 content, dry basis, % | ≥98 |
pH-value | 6.0 7.0 |
D50, μm | ≤6.0 |
BET specific surface area, m2/g | 230 250 |
105°C drying loss, % | ≤6.0 |
SO42- content, % | ≤0.5 |
Total iron content, mg/Kg | ≤300 |
DBP absorption cm3/g | 3.0-4.0 |
Loss on ignition % | ≤7.0 |
Heating loss % | ≤4.0-8.0 |