Electron Mobility and Effective Ionization Coefficients in SF6-CO2 Mixtures
Because of the potentially serious greenhouse effects that SF6 may cause on the atmosphere, efforts are being made to find gaseous substitutes that would retain many of the outstanding properties of this gas as a high voltage insulator and, at the same time being more environmentally friendly. Thus, intensive research has been carried out on SF6 mixed with other gases1-3 such as SF6-Ar, SF6-N2, SF6-He, SF6-CH4, SF6-CHF3, and SF6-CO2. In particular, the latter mixture has a higher minimum impulse breakdown voltage than pure SF 6 4 , and therefore it could be a good substitute for some insulation applications.
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