title: Analysis of the Sensitivity of K-Type Molecular Sieve-Deposited MWNTs for the Detection of SF₆ Decomposition Gases under Partial Discharge.
abstract: Sulfur hexafluoride (SF6) is widely utilized in gas-insulated switchgear (GIS). However, part of SF6 decomposes into different components under partial discharge (PD) conditions. Previous research has shown that the gas responses of intrinsic and 4 Å-type molecular sieve-deposited multi-wall carbon nanotubes (MWNTs) to SOF2 and SO2F2, two important decomposition components of SF6, are not obvious. In this study, a K-type molecular sieve-deposited MWNTs sensor was developed. Its gas response characteristics and the influence of the mixture ratios of gases on the gas-sensing properties were studied. The results showed that, for sensors with gas mixture ratios of 5:1, 10:1, and 20:1, the resistance change rate increased by nearly 13.0% after SOF2 adsorption, almost 10 times that of MWNTs sensors, while the sensors' resistance change rate with a mixture ratio of 10:1 reached 17.3% after SO2F2 adsorption, nearly nine times that of intrinsic MWNT sensors. Besides, a good linear relationship was observed between concentration of decomposition components and the resistance change rate of sensors.
authors.affiliation: State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University, Chongqing 400044, China. zhxx@cqu.edu.cn.|School of Electrical Engineering, Wuhan University, Wuhan 430072, China. zhxx@cqu.edu.cn.
authors.forename: Xiaoxing
authors.initials: X
authors.lastname: Zhang
authors.affiliation: State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University, Chongqing 400044, China. cqlixin@cqu.edu.cn.
authors.forename: Xin
authors.initials: X
authors.lastname: Li
authors.affiliation: Maintenance Company, State Grid Zhejiang Electric Power Company, Hangzhou 311232, China. luocc89@126.com.
authors.forename: Chenchen
authors.initials: C
authors.lastname: Luo
authors.affiliation: State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University, Chongqing 400044, China. 20141113009t@cqu.edu.cn.
authors.forename: Xingchen
authors.initials: X
authors.lastname: Dong
authors.affiliation: State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University, Chongqing 400044, China. 20131113102@cqu.edu.cn.
authors.forename: Lei
authors.initials: L
authors.lastname: Zhou
keywords: K molecular sieve; SF6 decomposition component; gas sensitivity; multi-walled carbon nanotube; partial discharge