Calculations of total electron-impact ionization cross sections for Fluoroketone C₅F₁₀O and Fluoronitrile C₄F₇N using modified Deutsch–Märk formula

Abstract

Both fluoroketone C5F10O and fluoronitrile C4F7N are promising substitute gases for SF6. The electron-impact ionization cross sections for these two gases are calculated using the Deutsch–Märk (DM) formula and its modified method. The necessary molecular geometry optimization and electron population were determined by ab initio calculation, which was performed with quantum chemistry code. The level of calculation, including the theoretical method and basis-set, are carefully determined. To eliminate the drawbacks of the DM formula, a modified DM formula is set in this paper. The modified DM formula, of which the weighting factors are changed, has a better agreement with the experimental data on both the peak and shape of the cross-section curves. The results calculated by DM formula and modified DM formula are given as references to fill in gaps in further research into C5F10O and C4F7N.

Numerical thermofluid simulation of a decaying arc behavior in CO2/O2/C5F10O (C5‐PFK) considering more than nona‐atomic molecules

“…To perform this calculation, it is necessary to calculate the chemical potential and then the internal partition function of each of species i . The data necessary for these calculations was obtained from Refs . The internal partition function and chemical potential were calculated in the temperature range of 300–30 000 K. These calculated data were used for particle composition calculations.…”

“…For the above reasons, much effort has been made to search for alternatives for SF 6 . Recently, C 5 F 10 O (C5‐PFK) and C 4 F 7 N (C4‐PFN) with CO 2 have attracted attention as alternatives gases for SF 6 . C 5 F 10 O (C5‐PFK) is in the liquid phase in the standard state, and its GWP is lower than unity.…”

“…However, there are little data available to study interruption ability of CO 2 /O 2 /C 5 F 10 O (C5‐PFK). Thus, a more detailed understanding of the fundamental properties of CO 2 /O 2 /C 5 F 10 O (C5‐PFK) is necessary for further progress in research and development of circuit breakers using CO 2 /O 2 /C 5 F 10 O (C5‐PFK) as arc quenching medium as well as other various gases .…”

Brief Review of Electron Collision Studies of Molecules Relevant to Plasma

“…Wang et al [70] have calculated the Q ion for C 5 F 10 O and C 6 F 12 O using the DM method. Xiong et al [71] have calculated the Q ion for C 5 F 10 O and C 4 F 7 N using the modified DM method. However, there are no studies on the elastic, excitation, differential, momentum transfer, and total cross sections for these species, which may be important for improving the understanding of these gases as potential substitutes for SF 6 .…”

Effect of oxygen on power frequency breakdown voltage and decomposition characteristics of the C5F10O/N2/O2 gas mixture

“…[9][10][11] Therefore, the demand to limit the application of SF 6 in the power industry is urgent. [12][13][14] In this regard, researchers have paid signicant attention to nd alternative gases for SF 6 from the perspective of insulation strength, environmental characteristics, decomposition properties as well as safety. Over the past three years, uorocarbon macromolecules, such as c-C 4 F 8 , CF 3 I, C 4 F 7 N, C 5 F 10 O, and C 6 F 12 O, have attracted attention.…”