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What are the main uses of silica?

What are the main uses of silica?

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Quartz sand is often used as glass raw materials and building materials.There are many ways to obtain matting agents from silica. They can be divided into two categories according to their manufacturing process. One is made by hydrothermal method, and the produced silica is relatively loose. Products made from silica gel are tough in texture. The treated two types of products can be made into standard silica matting agents. Processing refers to the use of organic (Paraffin) or inorganic materials to modify the surface of silicon dioxide to a certain extent. Compared with silica matting agent, the treated silica has different particle size, particle size distribution and pore volume. Hydrothermal matting agents are also different in particle size and distribution. Untreated and treated products are also different. At present, there is only one kind of matting agent suitable for special occasions. The matting agent is prepared by pyrolysis and has strong extinction efficiency, and is especially suitable for water base coating system.
Silica is an important material for making optical fibers.Generally pure quartz can be used to make quartz glass. The coefficient of expansion of quartz glass is very small, equal toOrdinary glass 1/18, can withstand the drastic changes in temperature, good acid resistance (except HF), therefore, quartz glassA chemical instrument that is often used to make high temperature resistance.
The extinction effect of silica is relatively strong, which may lead to higher viscosity when the concentration is high. The tendency to precipitate during storage, especially untreated silica. To avoid accumulation, we can use paraffin or pyrolytic silica. The matting agent can adjust the extinction degree of 45 DEG, 60 DEG and 85 deg. Coatings with silica matting agents can be painted. All of these are "stir-in" products.
The synthetic aluminum silicate can partly substitute titanium dioxide as a high quality increment agent and can be applied to emulsion primers. The product can exhibit a balanced extinction effect in the dried emulsion film. It can be used as matting agent in long oil alkyd resin system, but it must be dispersed with pigment and filler. In addition to the powder coating system, the silica matting agent can be applied to all coatings.
Use of silicaSilica has a wide range of uses. Scarce crystals in nature can be important in the manufacture of the electronics industryParts, optical instruments and arts and crafts.

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