电网技术2011，Vol.35Issue(10)：189-193,5.
氯化镍掺杂的碳纳米管对SF6放电分解产物的气敏响应
Gas Sensing Response of NiCl2-Doped Carbon Nanotubes to Decomposition Products of SF6 Gas due to Partial Discharge
摘要
Abstract
It is significant for secure operation of gas insulated switchgears （GIS） to detect and analyze the decomposition products of SF6 gas due to partial discharge. To analyze the mechanism of gas-sensing response of carbon nanotube （CNT） and the improvement of doping to its gas-sensing performance, a multi-walled carbon nanotubes （MWNT） sensor in which NiCl2 is doped is prepared in this way： firstly the ultrasonic doping of suspension liquid of concentrated acid pretreated carbon nanotubes by adding some NiCl2 × 6H2O crystal to it is performed, then the doped suspension liquid is coated onto interdigitated electrode on the base of printed circuit board, and then the dried doped suspension liquid forms gas sensing film. The gas sensing response of the sensor to decomposition products of SF6 gas due to partial discharge is tested and the results show that the sensor possesses good sensitivity and fast response performance, meanwhile the gas sensing responses of the sensor to standard gases of three typical decomposition products, i.e., SOF2, SO2F2 and SO2, are tested and the differences of gas sensing performances among these decomposition products are analyzed. The improvements of gas sensing performance of NiCl2-doped incarnate in following aspects： the structural defects of carbon nanotubes are increased; the reaction between Ni^2＋ and gas molecules further induces the variation of potential barrier of CNT gas sensing file; the Ni^2＋ granules themselves become local catalytic active center.关键词
碳纳米管/掺杂/六氟化硫/分解产物/气敏响应/局部放电Key words
carbon nanotubes/doped/sulphur hexafluoride/decomposition products/gas-sensing response/partial discharge分类
信息技术与安全科学引用本文复制引用
张晓星,冯波,张锦斌,唐炬,刘王挺..氯化镍掺杂的碳纳米管对SF6放电分解产物的气敏响应[J].电网技术,2011,35(10):189-193,5.基金项目
国家重点基础研究发展计划项目（973项目） （2009CB724506）. （）
