Silicon is also called crystalline silicon or industrial silicon, its main use is as a non-ferrous alloy additive.
Silicon is a metallic, gray, metallic color, hard and brittle. The content of silicon is about 26% of the crustal mass, the atomic weight is 28.80, the density is 2 33g/m3, and the melting point is 1410.
Use of metal silicon:
Metal Silicon (SI) is the industrial purification of the elemental silicon, mainly used in the production of organic silicon, the preparation of high-purity semiconductor materials and the preparation of special-purpose alloys.
(1) Production of silicone rubber, silicone resin, silicone oil and other silicone
Silicone rubber elastic, high temperature resistance, for the production of medical supplies, high-temperature washers and so on.
Silicone resin for the production of insulating paint, high-temperature paint and so on.
Silicone oil is a kind of oil, its viscosity affected by the temperature is very small, used for the production of advanced lubricants, glazing agents, fluid springs, dielectric liquids, etc., can also be processed into a colorless transparent liquid, as an advanced waterproof agent sprayed on the building surface.
(2) Manufacture of high purity semiconductors
Modern large-scale integrated circuits are almost all made of high-purity metal silicon, and high-purity metal silicon is the main raw material for the production of optical fiber, it can be said that metal silicon has become the foundation pillar industry in the information age.
(3) Preparation of alloy
Silicon aluminum alloy is a large amount of silicon alloy. Silicon-aluminum alloy is a strong composite deoxidation agent, in the steelmaking process instead of pure aluminum can improve the efficiency of deoxidation agent, and can purify the molten steel, improve the quality of steel. Silicon aluminum alloy small density, low thermal expansion coefficient, casting performance and wear resistance, with its cast alloy castings have a high impact resistance and good high pressure compactness, can greatly improve the service life, commonly used in the production of aerospace vehicles and automotive components.
The silicon-copper alloy has good weldability and is not easy to produce sparks when impacted, and has explosion-proof function, which can be used to make storage tank.
Silicon steel sheet can be added into steels to greatly improve the magnetic conductivity of steel, reduce hysteresis and eddy current losses, and can be used to manufacture transformers and motors of iron cores, improve the performance of transformers and motors.