Silicon is a kind of semiconductor material, which can be used in the production of semiconductor devices and integrated circuits. Can also be used in the form of alloys (such as silicon alloy), often used in automotive and mechanical parts. Metal ceramics and ceramics. Can also be used in the manufacture of glass, concrete, brick, refractory, silicone, silane. So how to prepare silicon?
Si (Taiwan Temple) is a chemical element, its chemical symbol is Si, its atomic number is 14, belonging to the class of metal elements in the periodic table of elements IVA. Crystalline silicon is dark blue, very brittle, is a typical semiconductor. Very stable chemical properties. Room temperature. Other hydrogen fluoride is difficult to react with other substances.
1822, the Swedish chemist Zeli white metal reduction four potassium silicon fluoride, silicon.
Silicon from English, meaning "Silicon dioxide".
Silicon mainly exists in the form of compounds, because only the most abundant oxygen element in the earth's crust, accounting for about 1 / 4 of the surface of rock, widely exists in silicate and silica.
In industry, it is usually made up of carbon dioxide in an electric furnace
Chemical reaction equation:
SiO2 + 2C + Si + 2CO
The purity of silicon, such as the preparation of 97 ~ 98%, known as silicon metal. It then melted and recrystallized, removed impurities with acid, and the purity of the metal silicon was 99.99.8%. If we want to make it into the semiconductor silicon, but also to convert it into an easy to purify liquid or gaseous form, followed by distillation, decomposition polysilicon process. For high-purity silicon, further purification is required.
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