Uses of metallic silicon
: metallic silicon (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) Production of silicone rubber, silicone resin, silicone oil, etc.
Silicone rubber has good elasticity and high temperature resistance. It is used to make medical supplies and high temperature gaskets. Silicone resin is used to produce insulating paint, high-temperature paint, etc.
Silicone oil is an oily substance whose viscosity is not affected by temperature. It is used to produce high-grade lubricants, polishes, fluid springs, dielectric liquids, etc. It can also be processed into colorless and transparent liquids and used as a high-grade waterproofing agent for spraying. On the surface of the building.
(2) Manufacturing high-purity semiconductors
Silicon is the raw material of ultra-pure silicon in the electronics industry. Electronic devices made of ultra-pure semiconductor single crystal silicon have the advantages of small size, light weight, good reliability and long life. High-power transistors, rectifiers and solar cells made of silicon single crystals doped with specific trace impurities are better than those made of germanium single crystals.
(3) Compound alloy
Silicon aluminum alloy is the most used silicon alloy. Silicon aluminum alloy is a strong composite deoxidizer. It can replace pure aluminum in the steelmaking process to increase the utilization rate of the deoxidizer, purify molten steel, and improve the quality of steel. Silicon aluminum alloy has low density, low thermal expansion coefficient, good casting performance and wear resistance. The alloy castings cast with it have high impact resistance and good high-pressure compactness, which can greatly increase the service life. It is commonly used in the production of aerospace vehicles And auto parts.
Silicon-copper alloy has good welding performance, and it is not easy to produce sparks when impacted. It has an explosion-proof function and can be used to make storage tanks.
Silicon steel is made of silicon steel sheet by adding silicon to steel, which can greatly improve the magnetic permeability of steel and reduce hysteresis and eddy current loss. It can be used to make transformers and motor cores and improve the performance of transformers and motors. With the development of science and technology, the application field of silicon metal will be further expanded