Transactions of China Electrotechnical Society  2016, Vol. 31 Issue (7): 159-165    DOI:
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Influences of CF4 Content on Discharge Characteristics of Argon Plasma Jet Under Atmospheric Pressure
Ding Zhengfang, Fang Zhi, Xu Jing
College of Electrical Engineering and Control Science Nanjing Tech University Nanjing 210009 China

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Abstract  In order to produce low tempreture plasma jet containing high active fluorine and to optimize its efficiency as well, the effects of CF4 content on the discharge characteristics of Argon plasma jet under atmospheric pressure are investigated by means of electrical properties measurements, including the voltage-current waveforms and the Lissajous figures, and optical properties measurements, including light-emission images and optical emission spectra. The trends of the main discharge parameters, such as discharge power, transferred charges, and the spectrum line intensities of the main particles in the discharge, changing with CF4 contents are calculated from the measured electrical and optical characteristics. And the experimental results are analyzed from the view point of discharge ionization process. Results show that with the increase of CF4 content within the Ar/CF4 plasma jet, the number of current pulses reduces, the pulse duration time and jet length become shorter, the lighting emission intensity becomes weaker, and the discharge power and the transferred charges also decrease. The spectrum line intensities for other particles except F decrease with the increase of CF4 content. The spectrum line intensity of F achieves its maximum value when the CF4 content is 4%,which suggests that the amounts of F containing groups is the most at this case. Under this condition the plasma jet can be used for hydrophobic surface modification of the insulation materials to achieve preferable results.
Key wordsPlasma jet      hydrophobic      discharge characteristics      lighting emission images      spectrum line intensity     
Received: 25 March 2015      Published: 20 April 2016
PACS: TM213  
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Ding Zhengfang
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Xu Jing
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Ding Zhengfang,Fang Zhi,Xu Jing. Influences of CF4 Content on Discharge Characteristics of Argon Plasma Jet Under Atmospheric Pressure[J]. Transactions of China Electrotechnical Society, 2016, 31(7): 159-165.
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