The varying characteristics of C5F10O decomposition components at 300 K - 3500 K with a chemical kinetic model

The variation characteristics of C5F10O decomposition components at 300 K – 3500 K are studied with a chemical kinetic model considering neutral reactions. Three chemical kinetic models of SF6 breakdown are built to verify the model adopted (model C) and the results show that ion/electron participated reactions slightly change the molar fractions, which are lower than 10-14 with little influence on the insulating performance of SF6. Therefore, model C is reasonable to study the varying characteristics of C5F10O decomposition components and thus the molar fractions of C5F10O decomposition products under different temperature decreasing curves and pressures are calculated. The results show that the molar fraction of C5F10O grows to approximately one as temperature declining to 1,500 K and the temperature decreasing rates have similar affects on the relaxation time of the reactions generating C5F10O. And high pressure promotes species recombining to C5F10O by increasing the molar fractions of C5F10O decomposition components. The results can be used to evaluate C5F10O insulating performance.