Silicon is the raw material of ultra-pure silicon in the electronics industry, and electronic devices made of ultra-pure semiconductor monocrystalline silicon have the advantages of small size, light weight, good reliability and long life. High-power transistors, rectiators and solar cells made of silicon single crystals doped with certain trace impurities are better than those made of germanium single crystals.
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2, amorphous silicon solar cell research progress is rapid, the conversion rate reached more than 8%. The maximum operating temperature of the silicon molybdenum rod electric heating element can reach 1700℃, and it has resistance and good oxidation resistance.
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3. Trichlorohydrosilicon produced with silicon can prepare hundreds of silicone lubricants and waterproof compounds. In addition, silicon carbide can be used as an abrasive, and quartz tubes made of high-purity silicon oxide are important materials for high-purity metal smelting and lighting fixtures.
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4. Silicon is an important element of plants. Silicon is an important nutrient element for plants, and most plants contain silicon. The results showed that the proportion of silicon in plant dry matter was 0.1-20%.
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5. Silicon is a quality element. It has the effect of improving the quality of agricultural products and is conducive to storage and transportation. Silicon can regulate photosynthesis and transpiration of crops, improve photosynthetic efficiency, and enhance crop resistance to drought, hot air and low temperature.
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Silicon fertilizer can enhance the resistance of crops to pests and diseases and reduce the harm of diseases and insects. After the silicon is absorbed by the crops, silicified cells are formed in the body, which thickens the cell wall on the surface of the stems and leaves and increases the cuticle layer, thus improving the resistance to insects and diseases. Silicon fertilizer can improve crop lodging resistance. Due to the straight stem of the crop, the lodging resistance is increased by about 80%.
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Silicon fertilizer can enhance the aeration of crops. The increase of silicon content in the crop body strengthens the rigidity of the crop conduit and promotes the ventilation, which can not only promote the growth of the crop root system, but also prevent the root rot and premature aging.
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6, microporous calcium silicon insulation material Microporous calcium silicon insulation material is an excellent insulation material. It has the characteristics of small heat capacity, high mechanical strength, low thermal conductivity, non-combustion, non-toxic and tasteless, can be cut, convenient transportation, etc., can be widely used in metallurgy, electric power, chemical industry, ships and other thermal equipment and pipelines.
Silicon is a chemical element, the chemical symbol is Si, formerly known as silicon, amorphous silicon and crystalline silicon two allotrope, belonging to the third period of the periodic table of elements, IVA group of metal-like elements. The content of silicon on the Earth's surface is second only to oxygen, accounting for nearly 28%, but it rarely appears in nature in the form of a single substance, but in the form of complex silicates or silicon dioxide, widely present in rocks, gravel, dust. Silicon is widely used in aerospace, electronics, construction, transportation, energy, chemical, textile, food, light industry, medical, agriculture and other industries.
There are many uses of silicon, can be applied to diodes, transistors, various integrated circuits and so on. It is also an important material for cermet and space travel. It can also be used in the field of communication, and is also a good waterproof coating material, which can prevent moss breeding and can also resist wind and rain.
Silicon has two allotropes: crystalline and amorphous. Crystalline silicon is divided into monocrystalline silicon and polysilicon, they all have a diamond lattice, crystal hard and brittle, with metallic luster, can conduct electricity, but the conductivity is less than metal, and increases with the temperature, with semiconductor properties.
The uses of silicon are: steel production, aerospace, transportation, medical, agriculture, textile, food, energy, chemical, electronic equipment, construction, light industry, automotive, chemical, etc., the range is very wide. Silicon is a chemical element, the content of the earth is extremely rich, this humble element, widely distributed in quartzite, crystal, agate, mica, feldspar and other rocks. Silicon reacts easily with oxygen, so it often occurs in the form of silica.
Uses of silicon:
(1) High-purity monocrystalline silicon is an important semiconductor material; (2) Metal ceramics, important materials for space navigation; ③ Optical fiber communication, the latest modern means of communication; ④ Excellent performance of silicone organic compounds.
The use of thyristor:
1, the use of relays to control, such as rice cooker, washing machine water valve;
2, the use of high-power transistor IGBT control;
3. Use rectifier bridge and triode;
4, use two SCRS to control;
5. Use a Triac for control.