Nature of Silicon powder


Crystalline silicon is steel gray, and amorphous silicon is black. Non-toxic, tasteless. d2.33; Melting point 1410 ; Average heat capacity (16~100 )0. 1774cal/(g -). Crystalline silicon belongs to the atomic crystal, is hard and glossy, and is a typical semiconductor. In addition to hydrogen fluoride at room temperature, it is difficult to react with other substances, insoluble in water, nitric acid, hydrochloric acid, and soluble in hydrofluoric acid and alkali. High temperatures can be combined with oxygen and other elements. It has the characteristics of high hardness, no water absorption, heat resistance, acid resistance, wear resistance, and aging resistance. Silicon is widely distributed in nature, containing about 27.6% of the Earth's crust. It mainly exists in the form of silica and silicate. Reduction is done by mixing silica with a SiO2 content of about 95% with Coke with a small amount of ash and heating to a temperature of about 1900 °c. This method's purity of the silicon obtained is 97% to 98%, called metallic silicon. After the metal silicon is melted, recrystallization is carried out, and impurities are removed with an acid to obtain a metal Silicon having a purity of 99.7% to 99.8%. If it is to be made into silicon for semiconductors, it should be converted into a liquid or gas form that is easy to purify. Then the polycrystalline silicon is obtained by distillation and decomposition. If high-purity silicon is required, further purification is required. If you are looking for high quality, high purity and cost-effective Silicon powder, or if you require the latest price of Silicon powder, please feel free to email contact mis-asia.

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