放电间隙较大的静止状态下，直流电压正极性和交流电压下气固混合两相体的击穿电压都大于相同条件下单一空气的，而直流电压负极性时则相反。
In the in- active state, the breakdown voltage were higher than the single air in the same conditions under AC and positive DC voltage, but it was opposite under negative DC voltage.
正极性导线电晕声音和无线电干扰变化都不大；负极性导线电晕声音和无线电干扰都增大。
The corona voice strengths and levels of radio interference produced by positive polarity wire have little changes, and those produced by negative polarity wire increase with temperature.
结果显示，ETFE薄膜驻极体具有优良的电荷储存稳定性，负极性ETFE的电荷稳定性明显优于正极性样品。
It is found that the charge stability of ETFE electret is very good, and the stability of negatively charged ETFE is much better than that of positively charged ETFE.
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