What is silica
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Silica chemical formula SiO2.nH2O is hydrated silica
Product name: white carbon black
Chemical name: hydrated silica
Structural formula: SiO2.nH2O
Appearance: white powder or granular
Quality Index:
project
Indicator
Silica content, %≥ 91
color
Sieve residue (45μm), %≤ 0.5
Heating loss, %
4-8
Burn reduction, % ≤ 7
pH value
5-8
Total copper content, mg/kg≤ 30
Total manganese content, mg/kg≤ 50
Total iron content, mg/kg ≤ 1000
DBP absorption value, cm3/g ≥
3.2?
Specific surface area, m2/g
250-350
Uses: Silica has the characteristics of easy crushing, and is mainly used for absorbing and dispersing oily substances, such as pesticide carriers. At the same time, silica is also widely used as a matting agent in the paint and coating industry.
