聚丙烯蜂窝膜驻极体压电系数的测量及压电性的改善  

The measurement of piezoelectric coefficient for PP cellular electret and the improvement of its piezoelectricity

作　　者：张鹏锋[1] 夏钟福[1] 邱勋林[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397-401,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：利用介电谐振谱分析了聚丙烯蜂窝状原生膜 (PPCellular,PQ5 0型 )的力学及介电参数 ,测得其压电系数d33约为 18pC N .经合理的压力膨化工艺处理后 ,其d33可增加至 36 7pC N ,比久负盛名的铁电聚合物聚偏氟乙烯 (PVDF)的d33高 2 0倍以上 ,也高于压电陶瓷锆钛酸铅 (PZT)的相应值 .ln this paper, mechanical and dielectric parameters of virgin PP cellular film( type PQ50) were analyzed by dielectric resonance spectroscopy, and piezoelectric d(33) coefficient of 18pC/N was measured. Up to 367pC/N of piezoelectric d(33) coefficient for PP cellular electret was performed by means of pressure-expansion techniques under the reasonable treatment conditions, which is about 20 times higher than that of famous ferroelectric polymer beta-PVDF and which is higher than that of piezoelectric ceramic PZT. Based on scanning electron micrograph and according to the piezoelectric theory model for PP cellular film the structural and physical sources for high piezoelectric coefficient of these kinds of nonpolar porous film electret with space charge were discussed.

关 键 词：压电系数 驻极体 电聚合 介电参数 类空间 电荷 力学 聚丙烯 PP 聚偏氟乙烯 

分 类 号：O484[理学—固体物理]