SILICA WHITE (SILICON DIOXIDE)
GOST 18307-78
Silica is a fine precipitated silicon dioxide. Chemical formula – m SiO2 · n H2O
Chemical & physical properties
|
BS-100 | BS-120 |
| Appearance | Powder and unstable white lumps | Powder and unstable white lumps or granules |
| Mass fraction of silicon dioxide, %, min | 86 | 87 |
| Mass fraction of moisture, %, max | 6,5 | 6,5 |
| Ignition losses, % | 5,0 – 7,0 | 3,5 – 7,0 |
| Mass fraction of iron in terms of iron oxide, %, max | 0,15 | 0,17 |
| Mass fraction of aluminium in terms of aluminium oxide, %, max | 0,15 | 0,10 |
| Mass fraction of chlorides (СI-), %, max | 1,0 | 1,0 |
| Mass fraction of sulphates (SO2-4)%, max | not rated | 0,2 |
| Mass fraction of calcium and magnesium in terms of calcium oxide, %, max | 0,8 | 0,8 |
| Mass fraction of alkalinity in terms of sodium oxide, %, max | not rated | 1,1 |
| рН water extract for powdery silica | 7,0 – 8,5 | 8,0 – 9,5 |
| Bulk density, g/dm3 for uncompacted silica for compacted silica |
80 – 130 170 – 220 |
120 – 150 180 – 230 |
| Specific suppression of phenol adsorption, m2/g | 100 ± 20 | 120 ± 20 |
| Mass fraction of residue on 014 К sieve, acc. To GOST 6613, %, max | 0,10 | 0,02 |
Applications
Silica is used as reinforcing filler for synthetic and polymeric materials in tyre, rubber, chemical, light, and other industries.
Packing, transportation, storage
Silica white is packed into four-ply laminated bags with one layer of polyethylene laminated paper up to 20 kg .
It is transported by any modes of transportation according to the Shipping Rules valid for the corresponding means of transport.
Guaranteed shelf life for silica white is 6 months since the date of manufacture
