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Charge storage and its dynamics in positively corona charged polytetrafluoroethylene film electrets

Zhang Peng-Feng Xia Zhong-Fu An Zhen-Lian Wu Xian-Yong

Charge storage and its dynamics in positively corona charged polytetrafluoroethylene film electrets

Zhang Peng-Feng, Xia Zhong-Fu, An Zhen-Lian, Wu Xian-Yong
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Publishing process
  • Received Date:  05 November 2003
  • Accepted Date:  20 February 2004
  • Published Online:  05 May 2004

Charge storage and its dynamics in positively corona charged polytetrafluoroethylene film electrets

  • 1. 同济大学波耳固体物理研究所,上海 200092

Abstract: In this paper, charge storage and its dynamics in positively corona char ged polytetrafluoroethylene(PTFE) film electrets have been studied. It is foun d that from room temperature to 100℃ and from about 150℃, especially from 180 ℃ to higher temperatures, slow retrapping controls the transport of detrapped c h arge; however, from about 100℃ to 150℃ the fast retrapping plays a dominant ro le. The increase of the initial surface potential will lead to a significant decay of charge density, so by means of properly controlling the charging parameter an d the heat treatment process we can get positively and negatively charged PTFE f ilm electrets with the same charge density, which not only have a similar charge storage life but also an outstanding charge storage stability. 

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