电子科技大学学报2012，Vol.41Issue(3)：463-466,4.DOI:10.3969/j.issn.1001-0548.2012.03.027
PVDF薄膜的极化及其电性能研究
Investigation on Poling and Electric Properties of PVDF Films
摘要
Abstract
In this paper, the influence of thermally poling and corona charging on electric properties of PVDF films was investigated by Fourier transform infrared (FTIR), differential scanning calorimetry (DSC), ferroelectric hysteresis loops and leakage current measurement. The results showed that the ferroelectric properties of PVDF films were both improved by thermally poling and corona charging, but the leakage properties of PVDF films were distinct due to different poling temperatures, poling electric fields and poling times. With the effect of high electric field at high temperature in thermally poling, the dipoles were oriented along the direction of electric field completely, which caused more polar (3 crystalline transited from non-polar a crystalline. So it was found that the crystalline degree, β crystalline content and remanent polarization of thermally poled PVDF films were higher than those of corona charged PVDF films. The reason that caused leakage current was also analyzed. The space charges injected during the poling process were stored in the shallow traps of PVDF films for corona poling and in the deep traps for thermally poling, respectively. Therefore, the leakage current of corona poled PVDF was unstable than that of thermally poled PVDF films.关键词
电晕极化/铁电性能/漏电流/PVDF薄膜/热极化Key words
corona poling/ ferroelectric properties/ leakage current/ PVDF films/ thermally poling分类
化学化工引用本文复制引用
叶芸,郭太良,蒋亚东,黎威智..PVDF薄膜的极化及其电性能研究[J].电子科技大学学报,2012,41(3):463-466,4.基金项目
国家杰出青年基金(60425101) （60425101）
国家重点实验室开发课题(KFJ200916) （KFJ200916）
福建省科技厅项目(2009J05145) （2009J05145）
