Item | Idex |
Appearance | White powder |
Whiteness | ≥standard sample |
S iO2 %(dry)% | ≥90 |
Heating loss 105℃,2h | 4.0-7.5 |
Loss on ignition(dry)%1000℃ 2h | 3.0-6.5 |
PH value | 6.0-7.5 |
BET(Specific surface area)㎡/g | 200-260 |
DBP Absorption value㎝³/g | ≥3.4 |
Fe content mg/kg | ≤500 |
Cu content mg/kg | ≤30 |
Mn content mg/kg | ≤50 |
Mesh | 1200 |
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