CAJ | 학술논문

检测和分析六氟化硫（SF6）气体放电分解产物对于气体绝缘组合电器（gas insulated switchgear，GIS）设备的安全运行有着重要意义。分析碳纳米管的气敏响应机制及掺杂对其气敏性能的改善，研制了一种氯化镍掺杂的多壁碳纳米管传感器，将NiCl2×6H2O和浓酸处理过的碳纳米管悬浊液超声掺杂，然后涂布在以印刷电路板为基底的又指电极上，干燥后作为气敏膜。测试了传感器对SF6放电分解产物的气敏响应，结果表现出良好的灵敏度和快速响应特性，同时也测试了传感器对SOF2、SO2F2和SO2这3种SF6典型分解产物标气的气敏响应，并分析了它们之间的气敏性差异。分析认为，NiCl2掺杂对碳纳米管气敏性能的提高主要体现在：1）增加了碳纳米管的结构缺陷；2）Ni^2＋和气体分子反应进而诱导了碳纳米管气敏膜的势垒发生变化；3）Ni^2＋颗粒自身成为了局部催化活性中心。
검측화분석륙불화류（SF6）기체방전분해산물대우기체절연조합전기（gas insulated switchgear，GIS）설비적안전운행유착중요의의。분석탄납미관적기민향응궤제급참잡대기기민성능적개선，연제료일충록화얼참잡적다벽탄납미관전감기，장NiCl2×6H2O화농산처리과적탄납미관현탁액초성참잡，연후도포재이인쇄전로판위기저적우지전겁상，간조후작위기민막。측시료전감기대SF6방전분해산물적기민향응，결과표현출량호적령민도화쾌속향응특성，동시야측시료전감기대SOF2、SO2F2화SO2저3충SF6전형분해산물표기적기민향응，병분석료타문지간적기민성차이。분석인위，NiCl2참잡대탄납미관기민성능적제고주요체현재：1）증가료탄납미관적결구결함；2）Ni^2＋ 화기체분자반응진이유도료탄납미관기민막적세루발생변화；3）Ni^2＋ 과립자신성위료국부최화활성중심。
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.