Silica

1, the source Silica powder is made from natural quartz (SiO2) or fused silica (natural quartz at high temperature melting, after cooling the amorphous SiO2) by crushing, ball milling (or vibration, jet mill), flotation, acid purification, high purity water treatment and other Road, processing of the powder. 2, physical and chemical properties
The proportion of silica is about 2.6, refractoriness is greater than 1600 ℃, Mohs hardness of 7.0, is a non-toxic, tasteless, non-polluting, inorganic non-metallic materials. Because of its good temperature resistance, acid and alkali resistance, excellent dielectric properties, low coefficient of thermal expansion, high thermal conductivity, suspension performance, high insulation, hardness and other excellent performance, are widely used in chemical, electronics, integrated circuit ( IC), electrical appliances, plastics, coatings, advanced paint, rubber, defense and other fields. With the rapid development of high-tech fields, microsilica will be entering a new historical period of development. 3, the silica powder in the role of rubber materials
(1) wear rubber products including rubber sheets, tubes, belts, rollers, it requires a good mix permeability and strong bonding, test results show that the compound filled with silica powder fully reflects thin plastic material, permeability, dispersion, and adhesion strength and other unique properties, is conducive to wipe the rubber coating on the canvas and enhanced adhesion between the film and the strength of canvas, products, tensile strength, permanent deformation and other mechanical properties were significantly improved, especially the wear resistance of rubber products increased.
(2) quasi-spherical silica insulating packaging material for epoxy resins, can greatly increase the filler content, reducing the viscosity of mixed materials, processing technology to improve performance, increase the penetration ability of mixture to reduce the expansion coefficient of cured and curing process, shrinkage, reduced thermal expansion difference.
(3) water content of less than 0.1% of the silica powder, can be used to improve the gel sealant bonding strength, yield value, shear force dilution index. With thickening, reinforcing effect, tear, anti-aging effect. (4) Silica, the main component is silicon dioxide, as a plastic filler, mainly used in polyethylene (PE), polymethyl methacrylate (PMMA), epoxy resin (EP), silica and other materials, products can improve the heat, water gas, reduce stress cracking. Specifications of silica powder