用恒流电晕充电改善聚丙烯驻极体的电荷贮存能力

Improved Charge Storage Capability of Polypropyrene Electret by Means of Constant Current Corona Charging

本文通过恒压和恒流充电后的聚丙烯(Polypropyrene简称pp)驻极体的等效表面电位衰减曲线和开路TSD(Thermally Stimulated Discharge)电流谱线的测量,阐明了恒流电晕充电可使聚丙烯驻极体注入较大的体电荷。利用热脉冲技术确定恒流和恒压条件下电荷重心的迁移规律,说明了恒流电晕充电能明显地改善PP电荷的贮存稳定性。

Through the measurements of equivalent surface potential decay curve and open-circuit TSD current spectrum, it is explained that bigger bulk charge may be injected into polypropyrene electret by using constant current corona charging. The shift law of mean charge depth under the conditions of constant voltage and constant current may be determined by using therm-pulse technique. It is shown that the constant cby using therm -pulse technique. It is shown that the constant current corona charging can improve the storage stability of the polypropyrene charge significantly.