%0 Journal Article
%T Influence of pressure expanding treatment on electret properties of positively corona charged cellular PP films<br>压力膨化处理对正极性聚丙烯蜂窝膜的驻极体性质的影响
%A Wang FeiPeng
%A Xia ZhongFu
%A Qiu XiaoMin
%A Lv Hang
%A Qiu XunLin
%A Shen Jun
%A <br>王飞鹏
%A 夏钟福
%A 裘晓敏
%A 吕 航
%A 邱勋林
%A 沈 军
%J 物理学报
%D 2005
%I 
%X Pressure expanding treatment is an effective method for improving the piezoelect ric activity of cellular PP films. In this work, the character of trap-level dis tribution for positively corona charged cellular PP films and the influence of t he pressure expanding treatment on its charge stability and charge transportatio n have been studied by means of thermal pulse technique, surface potential decay measurements, SEM and TSD spectrum analyses, etc. The results point out that th ere are three kinds of traps with different energy values in the range of middl e energy level for the cellular PP films, i.e. most of the deep traps and the shallow traps in the bulk, and most of the traps with middle energy values near the free surface. The pressure expanding treatment changes the state of traps a nd also, to a certain extent, reduces the charge storage stability of the cellul ar PP films, but has not impact on its charge transportation rule, in which the slow retrapping effect is dominant.
%K pressure expanding treatment
%K cellular PP film
%K electret
%K charge storage and tra p distribution
%K charge transportation<br>压力膨化处理，
%K 聚丙烯蜂窝膜，
%K 驻极体，
%K 电荷储存与陷阱分布，
%K 电荷输运
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=29DF2CB55EF687E7EFA80DFD4B978260&aid=2B4F9373A7E3A857&yid=2DD7160C83D0ACED&vid=318E4CC20AED4940&iid=9CF7A0430CBB2DFD&sid=05AA7BC465FE221E&eid=E7049257F6E6496A&journal_id=1000-3290&journal_name=物理学报&referenced_num=0&reference_num=25