热膨胀处理的聚丙烯蜂窝膜驻极体的压电性  

The piezoelectricity of heat-expanded PP cellular electret

作　　者：邱勋林[1] 夏钟福[1] 安振连[1] 吴贤勇[1] 

机构地区：[1]同济大学波耳固体物理研究所,上海200092

出　　处：《物理学报》2005年第1期402-406,共5页Acta Physica Sinica

基　　金：国家自然科学基金(批准号 :5 0 0 73 0 16);德国大众汽车基金会(批准号 :1/773 65 )资助的课题~~

摘　　要：研究了两种商用聚丙烯蜂窝膜 (PPCellular) (EUH75和SHD5 0 )的压电性 .通过热膨胀技术处理测得上述两种商品膜的压电d33系数分别可达 2 19pC/N和 196pC/N .它们比未经处理的样品提高了约两个数量级 ,而比著名的铁电聚合物PVDF高出一个数量级以上 .在强介电气体六氟化硫 (SF6 )中用高达 6 0kV的电晕电压对EUH75和SHD5 0样品充电后 。The piezoelectricity of commercially available PP cellular (EUH75 and SHD50) has been studied. Their piezoelectric d33 coefficients up to 219 pC/N and 196 pC/N were achieved after heat expansion, which are about two orders of magnitude larger than the corresponding coefficients of the samples without heat expansion and over one order of magnitude larger than that of the well-known ferroelectric polymer PVDF. Definitely different influence of corona charging with high voltage up to 60 kV in dielectric gas SF6 on the piezoelectric d33 coefficient for EUH75 and SHD50 samples was observed. The structural origin of this phenomenon was discussed.

关 键 词：PP蜂窝膜 压电性 热膨胀 介电气体 

分 类 号：TB39[一般工业技术—材料科学与工程]