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PVDF/PZT/CB高分子复合材料的介电耗能机制 被引量:6

STUDY ON MECHANISM OF DIELECTRIC LOSS OF POLYMERIC COMPOSITES PVDF/PZT/CB
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摘要 应用压电导电原理,研制了一种新型减振复合材料,通过对PVDF/PZT/CB复合体系的导电性能和动态介电性能的测试分析,探讨了该复合材料的介电耗能微观机制,认为该复合材料可通过界面极化和漏电电流两种介电耗能机制来达到减振目的。 As visco-elasticity shows much dependence on temperature and vibration frequency, the damping efficiency of traditional damping materials is not desirable. In order to solve this problem, a new damping mechanism has been studied in recent years. In this paper, a new damping composites composed of polymeric matrix PVDF, piezoelectric phase PZT and electro-conductive phase CB has been fabricated by means of blending-melting-compressing. PZT converts mechanical energy into electrical energy and then the electrical energy is dissipated as Joule heat through electrical conductive network formed by CB particles. The mechanism of dielectric loss of the new damping materials were studied through electrical conductivity analysis and dynamic dielectric analysis(DEA). The experimental results indicate that interfacial polarization and percolation electricity are two important energy-dissipating modes of PVDF/PZT/CB.
出处 《高分子材料科学与工程》 EI CAS CSCD 北大核心 2004年第2期209-212,共4页 Polymer Materials Science & Engineering
关键词 高分子复合材料 介电耗能机制 减振复合材料 压电导电效应 导电性能 动态介电性能 漏电电流 damping composites piezoelectric and electro-conductive effect electrical conductivity DEA interfacial polarization percolation electricity
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