What is silicon metal
The question of what metallic silicon is is no longer unfamiliar to us now, because metallic silicon has been more and more used in our daily life and industrial production. Shanghai non-ferrous metal silicon zone has the authority of the metal silicon spot price and non-ferrous index, the release of the Shanghai metal silicon spot price involving a variety of metal silicon products, its metal silicon price has become the wind vane of China's non-ferrous metal silicon market.
What is metallic silicon? Metallic silicon, also known as industrial silicon in China, is a commodity name that appeared in the mid-1960s. Its emergence has to do with the rise of the semiconductor industry. At present, the international common practice is to divide commercial silicon into metallic silicon and semiconductor silicon. Metallic silicon is a product smelted by quartz and coke in an electric heating furnace. The content of main component silicon element is about 98% (in recent years, 99.99% of Si content is also included in the metallic silicon), and the remaining impurities are iron, aluminum, calcium, etc. Semiconductor silicon a high - purity metal silicon used in semiconductor devices. It is sold with polycrystalline, single crystal form, the former is cheap, the latter is expensive. It is divided into various specifications for different purposes. According to statistics, in 1985, the world consumed about 500,000 tons of silicon metal, among which 60% used in aluminum alloy, less than 30% used in organic silicon, 3% used in semiconductor, the rest used in steel smelting and precision ceramics, etc.
Silicon Metal, also known as crystalline Silicon or industrial Silicon, is mainly used as an additive to non-ferrous alloys. Silicon is a nonmetallic element, gray in color, metallic, hard and brittle. The silicon content accounts for about 26% of the crust's mass. Atomic weight is 28.80; The density was 2.33g/m3. The melting point is 1410C; The boiling point is 2355C. The resistivity of 2140 Ω. M.
Metallic silicon grades: according to the content of iron, aluminum and calcium in metallic silicon, metallic silicon can be divided into 553, 441, 411, 421, 3303, 3305, 2202, 2502, 1501, 1101 and other different grades.
Additional products of metal silicon: including silicon powder, edge silicon, black silicon, metal silicon slag, etc. Silicon powder, also known as silicon powder, silicon powder or silica fume, is widely used in refractory materials and concrete industries.
