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Fine Pore (Type A) Silica Gel
Silica gel with fine pores includes spherical silica with fine pores and massive silica with fine pores. Spherical silica with fine pores has the appearance of colorless or yellow-transparent or translucent spherical particle, massive silica with fine pores is a colorless or yellow translucent glass-like irregular particle.
The average diameter is 2.0-3.0 nm, ratio surface area is 650-800 m2/g, pore volume is 0.35-0.45 ml/g, ratio heat 0.92 KJ/kg. ℃, thermal conductivity coefficient is 0.63 KJ / m. Hr.οC.
Use
Narrow Pore Silica Gel is one of the important adsorbents. It is widelly used as a desiccant in different industrial gases, such as air, oxygen, hydrogen and organic gas, or to be used widely as a damp-proof product in the packaging field of apparatus, electric equipments, mechanical equipd, textile, foodstuff, medicine, video camera, top grade dress, caps. Shoes, containers, etc. It is also used in dehydration refinery of organic products or air hunidity adjustment, or adsorbing flammable and explosive gases from compress air, such as ethyne.
Specification
| Item | Specification | Typical Value |
| Superior Class |
First Class |
Qualified Class |
Adsorption
Capacity | RH=20%, % ≥ | 10.5 | 10.0 | 8.0 | 11.2 |
| RH=50%, % ≥ | 23.0 | 22.0 | 20.0 | 29.2 |
| RH=90%, % ≥ | 36.0 | 32.0 | 30.0 | 37.6 |
| Loss on heating% ≤ | 2.0 | 4.0 | 6.0 | 1.0 |
| PH Value | 4-8 | 4-8 | 4-8 | 4.0 |
| Specific resistance Ω.cm ≥ | 3000 | 3000 | 3000 | 5630 |
| SiO2 Content % ≥ | 98 | 98 | 98 | 98.5 |
Size
0.5-1.5mm, 0.5-1mm, 2-4mm, 2-5mm, 4-8mm.
Packaging
25kg per bag or 800kg per bulk bag.
Note
The moisture content, packing and size can be adjusted according to customer's different requirements.
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