The varying characteristics of C 5 F 10 O decomposition components at 300 K - 3500 K with a chemical kinetic model

Abstract

The variation characteristics of C 5 F 10 O decomposition components at 300 K - 3500 K are studied with a chemical kinetic model considering neutral reactions. Three chemical kinetic models of SF 6 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 SF 6 . Therefore, model C is reasonable to study the varying characteristics of C 5 F 10 O decomposition components and thus the molar fractions of C 5 F 10 O decomposition products under different temperature decreasing curves and pressures are calculated. The results show that the molar fraction of C 5 F 10 O 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 C 5 F 10 O. And high pressure promotes species recombining to C 5 F 10 O by increasing the molar fractions of C 5 F 10 O decomposition components. The results can be used to evaluate C 5 F 10 O insulating performance.