锐钛矿型(101)晶面吸附SF<sub>6</sub>局部放电分解组分的气敏机理分析

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Abstract Partial discharge in gas-insulated switchgears (GIS) would lead to decomposition of insulating gas SF₆, with several kinds of characteristic gases produced. By detecting species and concentrations of these gases, insulating defects in gas-insulated switchgears can be discovered in time, which is essential in avoiding sudden faults of power system. TiO₂ nanotubes gas sensors as possess wide prospect in online monitoring of gas-insulated switchgears has broad application prospects. This paper focuses on the gas-sensing mechanism of TiO₂ nanotubes to SF₆ decomposed components from micro level. Materials Studio was adopted to conduct simulation of SO₂, SOF₂, and SO₂F₂ adsorption on anatase (101) with perfect surface, defect surface and Pt-doped surface. As a result, interaction of gas adsorption and conductive performance of anatase (101) surface were analyzed. Furthermore, gas-sensing experiment was also conducted to research the gas sensitive response of Pt doped and TiO₂ nanotube sensor to SO₂, SOF₂, and SO₂F₂, of which the results consisted with simulation analysis. Both simulation and experiment provide theoretical and practical basis on detection of SF₆ decomposition using TiO₂ nanotube gas sensors.

Key words： TiO₂ nanotube SF₆ decomposed components anatase (101) surface gas sensing mechanism

Received: 08 December 2015 Published: 27 February 2017

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TM85

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	Zhang Xiaoxing
	Dong Xingchen
	Chen Qinchuan

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Zhang Xiaoxing,Dong Xingchen,Chen Qinchuan. Gas Sensing Mechanism Analysis of SF₆ Decomposed Gases Adsorption on Anatase (101) Surface Under Partial Discharge[J]. Transactions of China Electrotechnical Society, 2017, 32(3): 200-209.

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https://dgjsxb.ces-transaction.com/EN/ OR https://dgjsxb.ces-transaction.com/EN/Y2017/V32/I3/200

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