Silicon metal (Si)
Atomic symbol: Si
Atomic number: 14
Element category: metalloid
Density: 2.332 g / cm3
Melting point: 1414 ° C (2577 ° F)
Boiling point: 3265 ° C (5909 ° F)
Silicon metal is obtained by reducing quartz using carbon in electric arc furnaces.
As a semiconductor, silicon plays a first-class role in semiconductor electronics. The property of silicon to dissolve well in dissolved metals is used for alloying with iron and non-ferrous metals, which contributes to the improvement of mechanical properties and corrosion resistance. Particularly large amounts of silicon are used in the aluminum industry.
Si metal is usually classified according to the content of three main impurities: iron, aluminum and calcium.
According to the percentage of iron, aluminum and calcium in Si metal, Si metal can be divided into 553, 441, 411, 421, 3303, 3305, 2202, 2502, 1501, 1101 and other different qualities, with the first two numbers expressing the percentage of iron and aluminum, and the third and fourth, respectively, express the percentage of calcium content.
Recently, silicon has played a significant role in silicone chemistry for the production of silane and silicone.