The use of silicon metal

Silicon metal (Si) is industrially purified elemental silicon, which is mainly used for the production of organic silicon, the preparation of high-purity semiconductor materials, and the preparation of alloys for special purposes.

(1) Preparation of alloy silicon-aluminum alloy is the largest amount of silicon alloy. Silicon aluminum alloy is a kind of strong composite deoxidizer, which can improve the utilization rate of deoxidizer by replacing pure aluminum in the steelmaking process, and can purify molten steel and improve the quality of steel. Silicon aluminum alloy has low density, low thermal expansion coefficient, good casting performance and anti-wear performance. The alloy castings cast with it have high impact resistance and good high pressure compactness, which can greatly improve the service life. It is often used to produce aerospace vehicles. and auto parts. Silicon copper alloy has good welding performance, and it is not easy to generate sparks when it is impacted. It has explosion-proof function and can be used to make storage tanks. Silicon is added to steel to make silicon steel sheet, which can greatly improve the magnetic permeability of steel, reduce hysteresis and eddy current loss, and can use it to make iron cores of transformers and motors to improve the performance of transformers and motors.

(2) Manufacturing of high-purity semiconductor Modern large-scale integrated circuits are almost all made of high-purity silicon, and high-purity metal silicon metal is also the main raw material for the production of optical fibers. It can be said that silicon metal has become the basic pillar industry of the information age.

(3) The production of silicone rubber, silicone resin, silicone oil and other silicone rubber has good elasticity and high temperature resistance, and is used to make medical supplies, high temperature resistant gaskets, etc. Silicone resins are used in the production of insulating paints, high temperature coatings, etc. Silicone oil is an oily substance whose viscosity is little affected by temperature. It is used in the production of advanced lubricants, polishes, fluid springs, dielectric liquids, etc. It can also be processed into colorless and transparent liquids for spraying as an advanced waterproofing agent. on the building surface.