Silicon is a non-metallic element. After oxygen, the most abundant element exists in the Earth's crust, mainly in the form of oxides and silicates with high melting points. It is also a material for semiconductors, the main raw materials for solar cells and LED lights. It can also be used to make semiconductor devices and integrated circuits. The old name is "silicon". Silicon is a commonly used deoxidizing element in metallurgy and has a strong affinity for oxygen.
Symbol of silicon Si, formerly known as silicon, atomic number 14, relative atomic mass 209, has two allotropes: amorphous and crystalline. Crystalline silicon is steel gray,Amorphous silicon is black, density 4g/cm3, melting point 1420℃, boiling point 2355℃, crystalline silicon is an atomic crystal, hard and shiny, with semiconductor properties.
Silicon is a non-metallic element, similar in nature to carbon, and the so-called metallic silicon is a mixture of silicon and other non-metallic elements, of which silicon accounts for about 97-98%.
Silicon is a crystal (SiC) with a diamond-like structure in which the positions of carbon and silicon atoms are alternating. At low temperatures, elemental silicon is not active, and has no effect on air, H2O, and acid, but can be strongly oxidized with strong basesThe agent acts at the appropriate temperature, such as silicon and halogen can generate silicon tetrahalide under heating or high temperature; The compounds of high valence silicon can be reduced to elemental silicon by reducing agents such as carbon, magnesium and hydrogen at high temperature.
1, SiO2 (silicon dioxide) use: the main raw material of high-performance communication materials optical fiber is silicon dioxide. Generally more pure quartz can be used to make quartz glass. Quartz glass is often used to make chemical instruments that are resistant to high temperatures. Crystals are often used to make electronsImportant industrial components, optical instruments, but also used to make high-grade industrial products and eye lenses.
2, the use of silicon (1) high purity monocrystalline silicon is an important semiconductor material.
3, the application of silicon: high purity monocrystalline silicon is an important semiconductor material. P-type silicon semiconductor is formed by adding a trace of Group IIIA element into monocrystal silicon. A small amount of group VA element is added to form an N-type semiconductor. P-type semiconductors and N-type semiconductors are combined to form p-n junctions, which can be made into solar cells that convert radiant energy into electricity. Cermet, important materials for space travel. <= Si F4 When heated, it can react with other halogens to produce silicon halide. 2, physical properties: silicon is a chemical element, its chemical symbol is Si. Atomic number 14, relative atomic mass 209, there are amorphous and crystalline allotropes, allotropes are amorphous silicon and crystalline silicon. A metal-like element belonging to the IVA group on the periodic table. Crystal structure: the cell is face-centered cubic cell.
3, the properties of silicon are as follows: physical properties there are two allotropes of amorphous silicon and crystalline silicon. Crystalline silicon is gray-black and amorphous silicon is black. Cell type:Cubic diamond type; Cell parameter: measured at 20℃, the cell parameter a=0.543087nm; Color and appearance: dark gray, with blue tones; The E of monocrystalline silicon (100) is 140 ~ 150GPa.
4, silicon is a crystal (SiC) with a diamond-like structure, in which the position of carbon and silicon atoms is alternating. At low temperatures, elemental silicon is not active, and has no effect with air, H2O, and acid, but can interact with strong bases and strong oxidants at appropriate temperatures, such as silicon and halogens at heating or high temperatures to generate silicon tetrahalide; The combination of high valence siliconIt can be reduced to elemental silicon by carbon, magnesium, hydrogen and other reducing agents at high temperature.
5, silicon is an oxygen philic element, always in nature with oxygen intercombination. Silicon exists mainly in the form of oxides and silicates with high melting points. The main component of sand is silica, which accounts for about 12% of the mass of the Earth's crust, and silicon is the most abundant non-metallic element in the earth's crust. The structure of monocrystalline silicon is similar to diamond, is a gray-black solid with a metallic luster melting point of 1410 degrees Celsius, the hardness is brittle, and the chemical properties are not active at room temperature.
6, properties of silicon: crystalline silicon is dark blue, veryBrittle, typical semiconductor. The chemical properties are very stable. At room temperature, it is difficult to react with other substances except hydrogen fluoride. The use of silicon: ① high purity monocrystalline silicon is an important semiconductor material.
[silicon] gu A nonmetallic element that is a semiconducting material used in semiconductor devices and integrated circuits. The old name is "silicon".
Silicon: gu - A nonmetallic element that is a semiconducting material used to make semiconducting devicesAnd integrated circuits. The old name is "silicon".
pronounced silicon (gu). A nonmetallic element present in the Earth's crust as the most abundant element after oxygen, mainly in the form of oxides and silicates with high melting points. It is also a material for semiconductors, the main raw materials for solar cells and LED lights. It can also be used to make semiconductor devices and integrated circuits. The old name is "silicon".
Silicon, pronounced [gu], is a non-metallic element, semiconductor material, used to make semiconductor devices and integrated circuits. The old name is "silicon". Silicon Valley [gu? gA high-tech intensive emerging city of the United States in the Santa Clara Valley in Santa Clara County, south of San Francisco. It is known for its semiconductor-electronics industry. After the general name of emerging professional science city.