High purity sulfur hexafluoride is also widely used in metal smelting, aerospace, medical (X-ray machine, laser machine), meteorology (tracer analysis), chemical industry (* * * automobile tires, new fire extinguishers), etc. due to its chemical inertness, non-toxic, incombustibility and non corrosiveness. It has good electrical insulation performance and excellent arc extinguishing performance.

High purity sulfur hexafluoride is mostly used for high and medium voltage power equipment. With the development of science and technology, SF6 is increasingly used in basic and scientific fields.

In high temperature arc, high-purity sulfur hexafluoride will be decomposed and ionized, which has a great impact on the heat conduction process with energy consumption. Therefore, the thermal conductivity at this time can be considered as consisting of two parts, namely, the standard thermal conductivity and the components related to decomposition and ionization reactions.

However, for the gas medium, the heat transfer capacity of high purity sulfur hexafluoride is often not purely conductive, but largely depends on convection heat transfer. Convective heat transfer is due to the existence of local pressure difference, which makes the gas medium generate macro motion to diffuse heat. The convective heat transfer capability of gas medium is related to the specific heat capacity and viscosity of gas.

Secondly, the diameter of sulfur hexafluoride molecule is larger than that of oxygen and nitrogen molecules in the air, which greatly shortens the average free travel of free electrons in sulfur hexafluoride gas, making it difficult to accumulate energy in the electric field, thus reducing the collision dissociation ability of free electrons.

The content of the article comes from high-purity sulfur hexafluoride: http://www.feiliergas.com