Sulfur hexafluoride gas is a colorless, odorless, non-toxic, non-flammable and transparent gas. Under normal circumstances, it has the possibility of liquefaction. It can remain gaseous at a temperature above 45 degrees Celsius. Under a uniform electric field, its marginal property is three times that of air, and its marginal property is equivalent to transformer oil at 4 atmospheres. It is widely used in electronic equipment, radar waveguides, particle accelerators, transformers, lightning arresters, etc. , Tracer device, medical treatment, etching, chemical phase deposition, standard gas, leak detection gas, carrier gas for chromatograph in semiconductor manufacturing.
. The role of sulfur hexafluoride: 1. The role of sulfur hexafluoride gas in the power industry
Sulfur hexafluoride is mainly used as an electrical edge medium and arc extinguishing agent. While ensuring the safe and reliable operation of power equipment, it can be miniaturized as much as possible and reduce equipment costs. Sulfur hexafluoride can be used for the new generation of ultra-high pressure edge dielectric materials. As a good gas edge body, it is widely used in the gas edge of electronic and electrical equipment. Electronic high-purity sulfur hexafluoride is an ideal electronic etching agent, which is widely used in the field of microelectronics technology and used as a plasma etching and cleaning agent in the manufacture of large integrated circuits such as computer chips and liquid crystal screens. It is used as a fluorine source in the production of fluorine-doped glass in the preparation of optical fibers, and as a dopant in the isolation layer in the production of low-loss high-quality single-mode optical fibers. It can also be used as a doping gas for nitrogen excimer lasers. It is used as a tracer, standard gas or preparing standard mixture in meteorology, environmental testing and other departments. Used as arc extinguishing and large-capacity transformer edge materials in high-voltage switches. It can also be used in particle accelerators and lightning arresters. Taking advantage of its good chemical stability and non-corrosion to equipment, it can be used as a refrigerant in the refrigeration industry (operating temperature between -45~0℃). Because of its high stopping ability for alpha particles, it is also used in radiochemistry.
2. The role of sulfur hexafluoride gas in the environmental protection industry
Sulfur hexafluoride is currently a widely used tracer for measuring air pollution, with a missing distance of up to 100 kilometers. At the same time, sulfur hexafluoride is used as a refrigerant to replace Freon, which has no destructive effect on the ozone layer, and meets the requirements of environmental protection and performance. It is a refrigerant with great development potential.
3. The role of sulfur hexafluoride gas in the smelting and casting process of non-ferrous metals
Sulfur hexafluoride can be used in the smelting and casting process of non-ferrous metals to prevent oxidation of magnesium and its alloy melts, and can also be used for degassing and purification of aluminum and its alloy melts. In the microelectronics industry, sulfur hexafluoride can be used to etch the silicon surface and remove organic or inorganic membranes on semiconductor materials, and can be used as a dopant for single-film optical fiber isolation layers in the manufacturing process of optical knife fibers. The current interrupter with sulfur hexafluoride has a high rated voltage and is not easy to burn. In addition, sulfur hexafluoride is also used in various accelerators, ultra-high voltage accumulators, coaxial cables and microwave transmission media. At present, sulfur hexafluoride is a widely used tracer for measuring air pollution, with a trace distance of up to 100km. Sulfur hexafluoride has good chemical stability and does not corrode equipment. It can be used as a refrigerant in the refrigeration industry (operating temperature is between -45～0℃), as a refrigerant to replace freon, and has no destructive effect on the ozone layer, and is environmentally friendly. It is a kind of refrigerant with great potential for development. Used as electrical edge medium and arc extinguishing agent, tracer for measuring the degree of air pollution.
4. The role of sulfur hexafluoride gas in the refrigeration industry
is mainly used for arc extinguishing in high-voltage switches, and used as edge material in large-capacity transformers and high-voltage cables. It can be used as a gas edge material in nuclear particle accelerators and arrester X-ray equipment. SF6 has good chemical stability and does not corrode the equipment. It can be used as a refrigerant in the refrigeration industry (operating temperature is between -45 and 0°C). SF6 has a high degree of stopping ability on α-particles, so it is also used in radiochemistry; it can also be used as an anti-adsorbent to replace oxygen from coal dust in coal mines.
2. Sulfur hexafluoride gas point: 1. Sulfur hexafluoride gas has no chemical effect on metals and other organic materials commonly used in electrical equipment. However, due to the action of high-power arc, spark discharge, and corona discharge, sulfur hexafluoride gas will decompose and liberate a variety of substances, mainly SF4, SF2, and a small amount of S2, F2, S, F, etc.
2. Pure SF6 gas is a colorless, odorless, non-flammable, and basically non-toxic halogen compound. The relative density of sulfur hexafluoride gas standard is 6.16g/cm3 (at 20°C, 0.1MPa) in the gaseous state and 1400g/cm3 (at 20°C) in the liquid state. The same state is about 5 times the relative density of air. For the convenience of transportation and storage of sulfur hexafluoride manufacturers, SF6 gas usually exists in the cylinder in liquid form.
3. Because sulfur hexafluoride has excellent chemical and thermal stability, if the purity is ensured, it will not be decomposed at 500°C. It has excellent edge and arc reducing ability, even if it is instantaneously decomposed and ionized under the arc. However, it can quickly return to the original stable state after the arc is reduced. Therefore, the high chemical stability and excellent electrical properties of Shuncheng sulfur hexafluoride are used to widely use electrical industry and ultra-high voltage edge materials.
4. High-purity sulfur hexafluoride also has a large heat transfer coefficient and a good cooling effect.
3. Advantages of Shuncheng Sulfur Hexafluoride Shuncheng Institute is a unit of internal research and development of sulfur hexafluoride production technology. It has obtained dozens of technological research and innovation results, and has integrated technologies in the fluorine and sulfur hexafluoride production industries. The strength has reached the advanced level, and the purity of high-purity sulfur hexafluoride is as high as 99.999% (5N). The product quality has reached the international advanced level, and some technologies are already at the advanced level. The product quality has fully met the needs of LCD, TFT and other production processes. With the increase of customers year by year, it has formed an annual production capacity of 500 tons, and sold to the United States, South Korea, Taiwan and other countries and regions, leading the industry in the same industry.
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