介质阻挡放电中电介质参量对放电时间特性的影响

采用介质参量不对称的装置，在大气压氩气介质阻挡放电中，研究了不同电介质温度及不同电介质材料对放电时间特性的影响.实验发现，外加电压较低时，正负半周的放电时间波形没有明显的差别；外加电压较高时，正负半周的放电脉冲个数不同.分析表明，电介质温度以及材料均影响壁电荷的积累，进而使放电特性发生改变. 关键词： 介质阻挡放电 时间特性 壁电荷 介电常数

Influence of dielectric parameters on temporal behavior of dielectric barrier discharge

The Influences of different temperature and materials of dielectrics on temporal behavior of dielectric barrier discharge in argon at atmospheric pressure are studied by using a device with asymmetric dielectric parameters. It is found that the temporal waveform of discharge current in each half cycle is almost the same at lower applied voltage, whereas the number of discharge current pulses is different in half cycles of different polarity at higher applied voltage. The analysis shows that both temperature and material of dielectrics affect the accumulation of wall charges, resulting in the change of temporal behavior of discharge.