Open AccessCharge storage and its dynamics in positively corona charged polytetrafluoroethylene film electrets
Author(s) -
Peng-Feng Zhang,
Zhang Xia,
Zhenlian An,
XianYong Wei
Publication year - 2004
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.53.3560
Subject(s) - electret , polytetrafluoroethylene , materials science , charge (physics) , corona (planetary geology) , charge density , surface charge , chemical physics , composite material , chemistry , physics , quantum mechanics , astrobiology , venus
In this paper, charge storage and its dynamics in positively corona char ged polytetrafluoroethylenePTFE 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.