Definition of metal silicon: Metal silicon, also known as crystalline silicon or industrial silicon, is mainly used as an additive for non-ferrous alloys. Silicon is a non-metallic element, gray, metallic, hard and brittle. The content of silicon accounts for about 26% of the mass of the earth's crust; the atomic weight is 28.80; the density is 2.33g/m3; the melting point is 1410°C; the boiling point is 2355°C; and the resistivity is 2140Ω.m.
Grades of metallic silicon: According to the content of iron, aluminum and calcium in metallic silicon, metallic silicon can be divided into different grades such as 553, 441, 411, 421, 3303, 3305, 2202, 2502, 1501, and 1101.
Additional products of silicon metal: including silicon powder, edge silicon, black silicon, metal silicon residue, etc. The silicon powder is also called silicon powder, micro-silicon powder or silica fume. It is widely used in the refractory and concrete industry.
The use of metal silicon: Silicon metal (Si) is an industrially purified elemental silicon, mainly used for the production of organic silicon, the preparation of high-purity semiconductor materials, and the preparation of special-purpose alloys.
(1) Production of Silicone, Silicone, Silicone, and Other Silicones
Silicone rubber has good elasticity and high temperature resistance. It is used to make medical supplies, high temperature washers and so on.
Silicone is used in the production of insulating paints, high-temperature coatings, etc.
Silicone oil is an oily substance whose viscosity is affected little by temperature. It is used to produce advanced lubricants, polishes, fluid springs, dielectric fluids, etc. It can also be processed into a colorless, transparent liquid as a high-grade waterproofing agent. On the surface of the building.
(2) Manufacturing high-purity semiconductors
Modern large-scale integrated circuits are almost all made of high-purity metallic silicon, and high-purity metallic silicon is also the main raw material for producing optical fibers. It can be said that metallic silicon has become the baSiC pillar industry in the information age.
(3) Preparation of alloys
Silicon-aluminum alloy is the most used silicon alloy. Silicon-aluminum alloy is a kind of strong composite deoxidizer. Substituting pure aluminum in the steel-making process can increase the utilization rate of deoxidizer, and can purify molten steel and improve the quality of steel. Silicon-aluminum alloy has low density, low coefficient of thermal expansion, good casting performance and wear resistance, and its cast alloy castings have high impact resistance and good high-pressure density, which can greatly increase the service life, and are 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 spark when subjected to impact. It has explosion-proof function and can be used to make storage tanks.
The silicon steel sheet made of silicon is added to the steel, which can greatly improve the magnetic conductivity of the steel and reduce the hysteresis and eddy current loss. It can be used to manufacture the core of transformers and motors and improve the performance of transformers and motors.