Table 2: Properties of nano-silica.

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

Back to Article