高电压技术2017，Vol.43Issue(3)：727-735,9.DOI:10.13336/j.1003-6520.hve.20170303006
CF3I及微氧条件下放电分解组分形成机理
Discharge Decomposition Components Forming Mechanism of CF3I Under Micro-aerobic Condition
摘要
Abstract
As a kind of stable,safe,and environmentally friendly electronegative gas,CF3I has received much attention in the field of substitute gases research in recent years,while the decomposition components forming mechanism of CF3I with micro-aerobic under discharge is seldomly studied.Consequently,we firstly explored the energy of decomposition components generated by the reaction between free radicals such as CF3· and CF2:based on the density functional theory (DFT),and calculated the energy change of the reaction path by using the transition state theory.Then,we obtained the reaction heat and activation energy of the components.Secondly,the main reactions and products of CF3I under discharge with micro-aerobic environment were analyzed.Finally,based on Fourier transform infiared absorption spectrometry(FTIR),the discharge decomposition components of pure CF3I and CF3I/O2 mixture were experimentally verified.The results show that there is no energy barrier in the process of generating CF4,C2F6,C2F4,and C2F5I,while the generation of C3F6 and C3F8 requires a certain activation energy.Free radicals and molecular produced by the decomposition of CF3I and O2 can generate COF2 through three reaction paths.The experimental results show that the existence of O2 can promote the consumption of CF3I and destroy the self-recovery process of the insulation,so that the dielectric strength is deteriorated.The insulation performance of CF3I under high pressure is better than that of low pressure,which is more reliable.关键词
密度泛函理论/过渡态理论/微氧/分解组分/形成机理Key words
density functional theory/transition state theory/micro-aerobic/decomposition components/forming mechanism引用本文复制引用
肖淞,李祎,张晓星,卓然,王邸博,田双双..CF3I及微氧条件下放电分解组分形成机理[J].高电压技术,2017,43(3):727-735,9.基金项目
国家自然科学基金重点项目(51537009).Project supported by National Natural Science Foundation of China (51537009). （51537009）
