In a high-temperature arc, Electric Gas SF6 Sulfur Hexafluoride will decompose and ionize, accompanied by energy consumption, which has a great impact on the heat conduction process. Therefore, the thermal conductivity at this time can be considered to be composed of two parts, namely the standard thermal conductivity and the component related to the decomposition and ionization reaction.
However, for gaseous media, its heat transfer capacity is often not a simple conduction effect, but depends to a large extent on convection heat transfer. Convection heat transfer is due to the existence of local pressure difference, which causes the gas medium to produce macroscopic movement to diffuse heat. The convection heat transfer capacity of the gas medium is related to factors such as the specific heat capacity and viscosity of the gas.
Secondly, the molecular diameter of Electric Gas SF6 Sulfur Hexafluoride is larger than that of oxygen and nitrogen molecules in the air, which greatly shortens the average free path of free electrons in sulfur hexafluoride gas, making it difficult to accumulate energy in the electric field, thereby reducing the collision ionization ability of free electrons.
In sulfur hexafluoride, the net collision dissociation coefficient of the electric charge is very small, and the negative ions with low mobility are very easy to combine with positive ions to form neutral molecules, so the insulation strength of sulfur hexafluoride gas is very high.
In the range of the frequency of the external AC voltage from industrial frequency to communication frequency, the insulation strength of sulfur hexafluoride gas remains basically unchanged. Therefore, Electric Gas SF6 Sulfur Hexafluoride is also widely used in many high-frequency electrical and electronic equipment, such as coaxial cables, waveguides, radar devices, etc.
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