High-purity sulfur hexafluoride is also widely used in metal smelting, aerospace, medical (X-ray machine, laser machine), meteorology (tracing analysis), chemical industry (high Automobile tires, new fire extinguishers), etc. It has good electrical performance and excellent arc extinguishing performance.
High-purity sulfur hexafluoride is mostly used in high and medium voltage power equipment. With the development of science and technology, the scope of SF6 continues to expand, and it is more and more widely used in basic and technological fields.
In the high-temperature arc, high-purity sulfur hexafluoride will be decomposed and ionized, and along with energy consumption, it has a great influence on the heat transfer process. Therefore, the thermal conductivity at this time can be considered to be composed of two parts, namely the standard thermal conductivity and the components related to the decomposition and ionization reactions.
However, for gaseous media, the heat transfer capacity of high-purity sulfur hexafluoride is often not simply conduction, but to a large extent depends on convective heat transfer. Convective heat transfer is due to the existence of local pressure difference, which causes the gas medium to produce a macroscopic movement to diffuse the heat. The convective heat transfer capacity of the gas medium is related to the specific heat capacity and viscosity of the gas.
Secondly, the molecular diameter of sulfur hexafluoride is larger than that of oxygen and nitrogen molecules in the air, which greatly shortens the mean free path of free electrons in sulfur hexafluoride gas, which makes it difficult to accumulate energy in the electric field, thus reducing the freedom. The collision dissociation ability of electrons.
Shuncheng Chemical Research and Design Institute Co., Ltd., formerly known as Shuncheng Chemical Research Institute, was a comprehensive research institute of the former Ministry of Chemical Industry. It was founded in 1965. According to the needs of our defense construction, it was researched by Beijing, Shanghai, Tianjin and Shenyang Chemical The relevant research laboratory of the institute was established in Qinghai, mainly engaged in the research and development of new chemical materials and chemical propellants and their raw materials. In 1984, it moved to Luoyang, Henan. In 1999, it was transformed from the original public institution to a technologically-owned enterprise. In 2012, it was restructured and renamed as "Shuncheng Chemical Research and Design Institute Co., Ltd.". It is now affiliated to China National Chemical Corporation.
After 50 years of development, Shuncheng Chemical Research and Design Institute Co., Ltd. has gradually formed a technology research and development center, consisting of four business sectors including chemical propellants and raw materials, new polyurethane materials, fluorine-containing gas materials, hydrogen peroxide and supporting raw materials. , With two service units of engineering design and analysis and testing, both of which are in the leading position in the same industry, and have made positive contributions to the aerospace industry, defense construction and civil economic development.
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