| Item Appearance |
Features High Dispersive White Powder |
|---|---|
| Heat reduction (%) (105°C, 2h)≤ | 3 |
| Loss of ignition (%) (950°C, 2h)≤ | 6 |
| SiO2 content (dry base) (%) ≥ | 92 |
| SiO2 content (%) (950°C, 2h) ≥ | 99.8 |
| Carbon content (%)≥ | 0.3 |
| Specific surface area (m2/g)(BET law) | 100 ± 25 |
| pH value | 6.5 – 7.5 |
| Surface density (g/ml) ≤ | 0.15 |
| Dispensability (%) (CCl4)≥ | 80 |
| Oil-absorbed value (ml/100g) ≥ | 250 |
| Average particle size (nm) | 10-25 |