Properties and test methods | Unit | Typical Value | Standardization |
Specific surface area (BET) | m2/g | 200 ± 25 | GB/T10722 |
pH value (in 4% dispersion) | 3.6 ~ 4.5 | GB/T1717 | |
Loss on drying (2 hours at 105°C) | Wt% | ≤ 1.5 | GB/T5211.3 |
Loss on ignition (2 hours at 1000°C, based on material dried for 2 hours at 105°C) |
Wt% | ≤ 2.5 | GB/T20020 |
Sieve residue (45 μm) | % | ≤ 0.05 | GB/T5211.14 |
Silica content (based on ignited material) | Wt% | ≥ 99.8 | GB/T20020 |
Tamped density (based on material dried for 2 hours at 105°C) | g/L | 40 ~ 60 | GB/T5211.4 |
Carbon content (based on material dried for 2 hours at 105°C) | Wt% | ≤ 0.2 | GB/T20020 |