Now we are no longer unfamiliar with what silicon metal is, because silicon metal has been more and more used in our daily life and industrial production. Shanghai nonferrous metal network silicon metal zone has the authoritative silicon metal spot price and non-ferrous index, the released Shanghai silicon metal spot price involves a variety of silicon metal products, the silicon metal price has become the vane of China nonferrous metal silicon metal market.
(1)Silicon metal introduction
Silicon metal, also known as industrial silicon in China is a commodity name in the mid-1960s. Its emergence is related to the rise of the semiconductor industry. At present, the international general practice is to divide the commercial silicon into silicon metal and silicon semiconductor. Silicon metal is a product smelted by quartz and coke in the electric heating furnace. The content of main component silicon element is about 98% (in recent years, the content of Si 99.99% also belongs to silicon metal), and the other impurities are iron, aluminum, calcium and so on. Semiconductor silicon A high-purity metallic silicon used in semiconductor devices. It is sold in the form of polycrystal and single crystal. The former is cheap and the latter is expensive. Because of its different uses and divided into a variety of specifications. According to statistics, in 1985 the world consumed about 500 thousand tons of silicon metal, which used for aluminum alloy about 60%, less than 30% for organic silicon, used for semiconductor about 3%, the rest used for iron and steel smelting and precision ceramics."Silicon Metal", also known as crystalline Silicon or industrial Silicon, is mainly used as an additive in non-iron based alloys. Silicon is a non-metallic element, gray, metallic color, hard and brittle. Silicon makes up about 26% of the mass of the earth's crust; Atomic weight is 28.80; Density 2.33g/m3; Melting point is 1410C; The boiling point is 2355C; The resistivity is 2140 ω.m.
(2)Silicon metal grade
According to the content of iron, aluminum and calcium in silicon metal, silicon metal can be divided into 553, 441, 411, 421, 3303, 3305, 2202, 2502, 1501, 1101 and other different grades.
(3)Silicon metal additional products
Including silicon powder, edge silicon, black silicon, silicon metal slag, etc. Silicon powder is also known as silica powder, silica powder or silica ash, which is widely used in refractory materials and concrete industry.
