摘要
为了产生高活性含氟低温等离子体并优化其效率,通过电压电流波形和Lissajous图形等电气特性的测量及发射光谱和发光图像等光学特性诊断,研究了CF_4含量对大气压Ar等离子体射流放电特性的影响。测量得到不同外加电压下的电气特性、发光特性及光谱特性,进一步计算得到放电功率、传输电荷、放电空间主要粒子谱线强度等主要放电参量随CF_4含量的变化趋势,并结合放电电离过程对所得实验结果进行了分析。结果表明,Ar/CF_4等离子体射流随CF_4含量的增加,电流脉冲数减少,脉冲持续时间变短,射流长度变短,发光强度减弱,传输电荷和放电功率随之减小。除F_谱线外,其他主要粒子谱线均随CF_4含量增加逐渐减小,F_光谱在CF_4含量为4%时达到最大值,此时含F_基团量最多。因此,在此条件下,可用于绝缘材料表面憎水性改性,以期达到良好效果。
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 voltagecurrent 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.
出处
《电工技术学报》
EI
CSCD
北大核心
2016年第7期159-165,共7页
Transactions of China Electrotechnical Society
基金
国家自然科学基金(51377075)
江苏省自然科学基金(BK20131412)
江苏省六大人才高峰项目(2014-XNY-006)
江苏省青蓝工程项目(20140610)资助
关键词
等离子体射流
憎水性
放电特性
发光图像
谱线强度
Plasma jet
hydrophobic
discharge characteristics
lighting emission images
spectrum line intensity
