Polysilicon
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Polysilicon
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- Commodity name: Polysilicon
When molten silicon solidifies under supercooling conditions, silicon atoms are arranged in the form of a diamond lattice to form many crystal nuclei. If these crystal nuclei grow into grains with different crystal plane orientations, these grains will combine to crystallize into polycrystalline silicon.
Polysilicon is the direct raw material for the production of single crystal silicon and is the basic electronic information material for contemporary semiconductor devices such as artificial intelligence, automatic control, information processing, and photoelectric conversion.
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Polycrystalline silicon has a grey metallic luster and a density of 2.32~2.34g/cm3. Melting point is 1410℃. Boiling point is 2355℃. It is soluble in a mixture of hydrofluoric acid and nitric acid, but insoluble in water, nitric acid and hydrochloric acid. Its hardness is between that of germanium and quartz. It is brittle at room temperature and easily breaks when cut. It becomes ductile when heated to above 800℃, and shows obvious deformation at 1300℃. It is inactive at room temperature, but reacts with oxygen, nitrogen, sulfur, etc. at high temperatures. In a high-temperature molten state, it has great chemical activity and can react with almost any material. It has semiconductor properties and is an extremely important and excellent semiconductor material, but trace amounts of impurities can greatly affect its conductivity. It is widely used in the electronics industry as a basic material for manufacturing semiconductor radios, tape recorders, refrigerators, color TVs, video recorders, and electronic computers. It is obtained by chlorinating dry silicon powder with dry hydrogen chloride gas under certain conditions, and then condensing, distilling, and reducing it.
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Chinese name: Polysilicon Chemical formula: Si Purity: 99.999% Density: 2.33g/cm³ Delivery time: 2 weeks Transportation: Express delivery
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