What is Precipitated Silica?
The technical parameters and composition description of precipitation method silica are as follows:
Chemical composition:
The main component is silicon dioxide (SiO2), with a chemical formula of SiO2 · nH2O, and the appearance is white amorphous powder
.
The purity requirement is usually above 95%, and some products can reach over 98%.
physical property:
Specific surface area: generally between 180-200 m ²/g.
Average particle size: 7-10 microns.
Oil absorption value: 2.3-2.5 cm ³/g.
PH value: 6.5-7.5.
Drying reduction: not less than 4%.
Burning loss: not exceeding 8.5%.
45 mesh sieve residue: ≤ 0.5%.
Production method:
Prepared by reacting sodium silicate with sulfuric acid, the reaction is carried out under alkaline conditions in the liquid phase
.
During the production process, it is necessary to control variables such as raw material quality, component concentration, temperature, reaction time, pH value, and stirring speed
.
Application areas:
Widely used in rubber, plastic, synthetic rubber, natural rubber products, adhesives and other fields
.
Enhance performance, wear resistance, high temperature resistance, tear resistance, and improve dielectric properties in silicone rubber; Plays a filling and reinforcing role in synthetic rubber and natural rubber.
Other features:
Has good electrical insulation and chemical inertness, insoluble in water, solvents, and acids (except hydrofluoric acid).
In different applications, parameters such as specific surface area, particle size, morphology, structure, and porosity may vary
.
In summary, JS-95MP precipitation method silica is a high-purity, porous amorphous powder with excellent physical and chemical properties, widely used in multiple industrial fields.
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Fax: +86-592-5528716
Email: jk@jksilica.com
Add: Gaosha Industrial Zone, Sha County, Sanming, Fujian, China