High purity sulfur hexafluoride is a colorless and odorless gas with stable chemical properties. Slightly soluble in water, alcohol and ether, soluble in potassium hydroxide. It does not react chemically with sodium hydroxide, liquid ammonia, hydrochloric acid and water. It does not react with copper, silver, iron and aluminum in a dry environment below 300 ℃. It has no effect on quartz below 500 ℃. It reacts with metal sodium at 250 ℃ and in liquid ammonia at - 64 ℃. It decomposes when mixed with hydrogen sulfide. At 200 ℃, in the presence of specific metals such as steel and silicon steel, it can promote their slow decomposition.

High purity sulfur hexafluoride has good electrical insulation performance and excellent arc extinguishing performance. Its electric strength is 2.5 times that of nitrogen under the same pressure, its breakdown voltage is 2.5 times that of air, and its arc extinguishing capacity is 100 times that of air. It is a new generation of ultra-high voltage insulating medium material superior to that between air and oil. Sulfur hexafluoride has good insulation performance and arc extinguishing performance, such as circuit breaker, high-voltage transformer, gas enclosed combined capacitor, high-voltage transmission line, transformer, etc.

Electronic grade high-purity sulfur hexafluoride is an ideal electronic etchant, which is widely used in the field of microelectronics technology. As a refrigerant, the refrigeration range of refrigeration industry can be between - 45 ℃ and 0 ℃. The electrical industry uses its high dielectric strength and good arc extinguishing performance as insulation materials for high-voltage switches, large capacity transformers, high-voltage cables and gases.

The mining industry is used as a reverse adsorbent to replace oxygen in mine coal dust. Liming sulfur hexafluoride is also widely used in metal smelting (such as magnesium alloy melting furnace shielding gas), aerospace, medical (X-ray machine, laser machine), meteorology (trace analysis), chemical (* * * automobile tires, new fire extinguishers), etc. because of its chemical inertness, non-toxic, incombustibility and non corrosiveness. With the development of science and technology, SF6 has been widely used in more and more basic fields and scientific and technological fields.

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