fine-pored silica gelfused for drying and moistureproof,also be used as catalyst carriers ,adsorbents, separators
Transparent or translucent glass-like pellet or lump.
Average pore diameter: 2.0-3.0nm.
Specific surface area: 650-800 m2/g
Pore volume: 0.35-0.45ml/g.
Specific heat : 0.92 KJ/kg.°C.
Thermal conductivity:0.63 KJ/m.hr.°C.
[Use] Mainly used for drying and moistureproof , may also be used as catalyst carriers, adsorbents, separators and variable-pressure adsorbents, etc.
[ Basic quality parameters]
Item | Specifications | Typical values | |||
Superior class | First class | Qualified class | |||
Adsorption Capacity | RH=20%, % ≥ | 10.5 | 10.0 | 9.0 | 11.2 |
RH=50%, % ≥ | 29.0 | 28.0 | 23.0 | 29.2 | |
RH=90%, % ≥ | 38.0 | 36.0 | 34.0 | 39.0 | |
Loss on heating, % ≤ | 2.0 | 4.0 | 5.0 | 1.5 | |
PH value | 4-8 | -- | -- | 4 | |
Specific resistance,Ω.cm ≥ | 3000 | -- | -- | 4200 | |
Silica, % ≥ | 98 | * | -- | 98.5 | |
Qualified ratio of | 90 | * | -- | 92 | |
Size | * |
| * | 2-4mm | |
Bulk density, g/L | * |
| * | 788 | |
*.Negotiable | |||||
Note: qualified ratio of spherical granules is only applicable to fine-pored silica gel |
[ Size] 0.5-2mm,1-2mm,1-3mm,2-4mm,3-5mm,4-8mm