Influence of poling conditions on the gas emission of PVDF

Proceedings of IEEE Conference on Electrical Insulation and Dielectric Phenomena - (CEIDP '93) Pub Date : 1993-10-17 DOI:10.1109/CEIDP.1993.378962

G. Eberle, Helmut Schmidt, W. Eisenmenger

{"title":"Influence of poling conditions on the gas emission of PVDF","authors":"G. Eberle, Helmut Schmidt, W. Eisenmenger","doi":"10.1109/CEIDP.1993.378962","DOIUrl":null,"url":null,"abstract":"The influence of the poling time and the polarity of the applied voltage on the time dependence of the gas emission of PVDF is investigated. If PVDF films are poled in electric fields of about 100MV/m, charges are injected and ions are formed by electrochemical reactions. By recombination and by other reactions of these ions, HF gas is evolved, diffusing out of the sample through the porous electrode. This gas emission increases with increasing field strength. At constant field it decreases to a steady state value comparable to the space-charge-limited poling current of PVDF. Free ions are trapped in the polarization zone. Under short-circuit conditions shallow trapped ions are freed and the gas emission increases strongly. The longer the poling time, the broader the polarization distribution. If the polarization zone is located near the nonporous electrode, the recombined gas molecules need longer time to reach the porous electrode. Therefore, the gas emission under short-circuit conditions is delayed by poling with negative polarity compared to positive polarity.<<ETX>>","PeriodicalId":149803,"journal":{"name":"Proceedings of IEEE Conference on Electrical Insulation and Dielectric Phenomena - (CEIDP '93)","volume":"341 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"1993-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"10","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Proceedings of IEEE Conference on Electrical Insulation and Dielectric Phenomena - (CEIDP '93)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/CEIDP.1993.378962","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}

引用次数: 10

Abstract

The influence of the poling time and the polarity of the applied voltage on the time dependence of the gas emission of PVDF is investigated. If PVDF films are poled in electric fields of about 100MV/m, charges are injected and ions are formed by electrochemical reactions. By recombination and by other reactions of these ions, HF gas is evolved, diffusing out of the sample through the porous electrode. This gas emission increases with increasing field strength. At constant field it decreases to a steady state value comparable to the space-charge-limited poling current of PVDF. Free ions are trapped in the polarization zone. Under short-circuit conditions shallow trapped ions are freed and the gas emission increases strongly. The longer the poling time, the broader the polarization distribution. If the polarization zone is located near the nonporous electrode, the recombined gas molecules need longer time to reach the porous electrode. Therefore, the gas emission under short-circuit conditions is delayed by poling with negative polarity compared to positive polarity.<>

查看原文

微信好友朋友圈 QQ好友复制链接

本刊更多论文

浇注条件对PVDF气体排放的影响

研究了极化时间和外加电压极性对PVDF气体发射时间依赖性的影响。如果PVDF膜在约100MV/m的电场中极化，则会注入电荷，并通过电化学反应形成离子。通过这些离子的重组和其他反应，HF气体被释放出来，通过多孔电极从样品中扩散出来。这种气体释放量随着场强的增加而增加。在恒定场下，它减小到与PVDF的空间电荷限制极化电流相当的稳态值。自由离子被困在极化区。在短路条件下，浅层捕获的离子被释放，气体排放强烈增加。极化时间越长，极化分布越宽。如果极化区位于非多孔电极附近，则复合气体分子到达多孔电极所需的时间较长。因此，在短路条件下，与正极性相比，负极性极化延迟了气体的释放

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文去求助

来源期刊

Proceedings of IEEE Conference on Electrical Insulation and Dielectric Phenomena - (CEIDP '93)

自引率

0.00%

发文量