silicon metal properties

The silicon metal component is mainly silicon and thus silicon metal properties is similar to silicon. Silicon has two allotropes of amorphous silicon and crystalline silicon. Amorphous silicon is a gray-black powder and is actually a microcrystal. Crystalline silicon has the crystal structure and semiconducting properties of diamond, melting point 1410 ℃, boiling point 2355℃, Mohs hardness 7, brittleness. Amorphous silicon is chemically active and can burn intensely in oxygen. It reacts with non-metals such as halogen, nitrogen and carbon at high temperatures, and also reacts with metals such as magnesium, calcium and iron to form silicides. Amorphous silicon is hardly soluble in all inorganic and organic acids including hydrofluoric acid, but is soluble in a mixed acid of nitric acid and hydrofluoric acid. The concentrated sodium hydroxide solution dissolves amorphous silicon and releases hydrogen. Crystalline silicon is relatively inactive, does not combine with oxygen even at high temperatures, it is not soluble in any inorganic acid and organic acid, but is soluble in mixed acid of nitric acid and hydrofluoric acid and concentrated sodium hydroxide solution.

Silicon is widely used for smelting into ferrosilicon alloys as alloying elements in the steel industry, and as a reducing agent in many metal smelting. Silicon metal properties is make it also a good component in aluminum alloys, and most cast aluminum alloys contain silicon. Silicon is the raw material of ultra-pure silicon in the electronics industry. The ultra-pure semiconductor monocrystalline silicon electronic device has the advantages of small size, light weight, good reliability and long life, because of silicon metal properties.

From a global perspective, the consumption of silicon for metallurgy is more than that for chemical silicon. However, with the continuous development of science and technology, chemical silicon is widely used in the fields of silicone and semiconductor production, and is widely used in the production of organic Silicon monomer and polymer silicone oil, silicone rubber, silicone building anti-corrosion, waterproofing agent, etc., they have high temperature resistance, electrical insulation, radiation resistance, waterproof and other unique silicon metal properties . Used in electrical, aerospace, machinery, chemical, pharmaceutical, defense, construction and other departments. More than 95% of the electronic components that are the core of integrated circuits are made of semiconductor silicon, which is the backbone of the modern information industry. The fiber in the fiber optic cable, which is widely used in the "information superhighway", is also produced from silicon metal. The consumption of chemical silicon in the United States and the European Union has accounted for more than half of total silicon metal consumption. Chemical silicon is widely used as a high-tech field and an important basic industry, and its consumption tends to grow steadily.