According to metal powder supplier, silicon is a nonmetallic element, gray, metallic color, hard and brittle. The silicon content is account for about 26% in the earthcrust;
atomic weight is 28.80; the density is 2.33g/m3; melting point is 1410C; boiling point is 2355C; resistivity is 2140©.m. Silicon resources is refer to crystal, quartz veins, quartz gravel (gravel quartz), natural silica sand and so on, is a non-metallic mineral, the main chemical ingredient is SiO2, rich in nature. The silicon metal is made of quartz and coke in an electric furnace smelting into product, the main component silicon element content of around 98%, the remaining impurities such as iron, aluminum, calcium.
Silicon metal is the industrial purification elemental silicon, is mainly used for the production of organic silicon, prepare high purity semiconductor materials as well as the preparation of special purpose alloys. Additional products include microsilica, silicon edge leather, black silicon, silicon metal slag. Which the microsilica, also known as silica fume or silicon powder, and it is widely used in refractory and concrete industry.
The production of silicone, silicone rubber, silicone resin, silicone oil and so on. Silicone rubber with good elasticity, high temperature resistance, for the production of medical supplies, fire-resistant gasket, silicon resin used in the production of insulating paint, high temperature coatings and so on. The micropore CaSi insulation material is an excellent insulation material. It has a small heat capacity, high mechanical strength, low thermal conductivity, non-burning, non-toxic, tasteless, can be cut, easy to transport, and can be widely used in metallurgy, electric power, chemicals, shipbuilding and other thermal equipment and piping. After the test, its energy-saving benefits is superior to asbestos, cement, vermiculite, cement perlite and other insulation materials.
The silicone oil is an oil, the viscosity is little affected by the temperature, used to produce advanced lubricants, polishing agents, fluid spring, the dielectric liquid and so on, also can be processed into a colorless and transparent liquid, spraying as advanced waterproofing agent in the building surface.
The manufacture of high-purity semiconductor, modern, large-scale integrated circuits are almost made of high-purity silicon metal, and the high purity silicon metal also the main raw material of the optical fiber, it can be said that silicon metal has become a pillar industry of the basis of the information age.
Silicon is the raw material of ultra-pure silicon electronics industry, the devices made of ultrapure semiconductor silicon electronic with the advantages of small size, light weight, good reliability and long life. Silicon single crystal doped with specific trace impurities made of high-power transistors, rectifiers and solar cells is better than germanium crystal . Amorphous silicon solar cell research in recent years progress, the conversion rate is more than 8%.
Silicon aluminum alloy is the largest amount of silicon alloy. The silicon-aluminum alloy is a strong composite deoxidizer in the steelmaking process instead of pure aluminum can improve the utilization of a deoxidizer, and purify the liquid steel, improve the quality of steel. The silicon aluminum density, low coefficient of thermal expansion, good casting properties and resistance to wear, the fight against high impact capacity and good high pressure dense, can greatly improve the life of the spacecraft, commonly used in its production with a cast alloy castings and auto parts. Silicon-copper alloy has good weldability, is not easy to produce sparks, explosion-proof function when impacting, can be used for producing tanks.
Adding the silicon steel plates made of silicon in steel can greatly improve the steel magnetic permeability to reduce the hysteresis and eddy current losses, available its manufacture the iron core of transformers and motors, to improve the performance of the transformer and motor. Silicon molybdenum rod heating element maximum use temperature up to 1700 , the resistance is not easy to aging and good oxidation resistance.
Source:http://www.mhcmp.com
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