What is metal silicon

Metallic silicon" (also called industrial silicon in my country) is a trade name that appeared in the mid-1960s. Its appearance is related to the rise of the semiconductor industry. The international common practice is to divide commercial silicon into metal silicon and semiconductor silicon. Metallic silicon is a product smelted from quartz and coke in an electric furnace. The main component of silicon is about 98% (99.99% of Si is also contained in metallic silicon), and the remaining impurities are iron, aluminum, calcium, etc. . Semiconductor silicon is used to make high-purity metal silicon for semiconductor devices. It is sold in the form of polycrystalline and single crystal, the former is cheap and the latter is expensive. It is divided into a variety of specifications due to its different uses. According to statistics, the world consumed about 500,000 tons of metal silicon in 1985, of which 60% is used for aluminum alloy, less than 30% is used for organic silicon, about 3% is used for semiconductors, and the rest is used for Iron and steel smelting and precision ceramics, etc.