磁流变弹性体的导电机理分析  

Analysis on conductive mechanism of magnetorheological elastomers

作　　者：滕桂荣[1] 朱绪力[2] 孙朝阳[2] 刘济仁[1] 吕楠[2] 

机构地区：[1]山东科技大学矿业与安全工程学院,山东青岛266590 [2]山东科技大学机械电子工程学院,山东青岛266590

出　　处：《功能材料》2015年第22期22045-22048,共4页Journal of Functional Materials

基　　金：山东省自然科学基金资助项目(ZR2011EEM005);青岛经济技术开发区重点科技发展计划资助项目(2013-1-67)

摘　　要：磁流变弹性体的制备过程中,其内部导磁颗粒沿外加磁场方向聚集成链状。颗粒链能作为导电通道使得磁流变弹性体导电。根据磁流变弹性体的颗粒结构特点,在其内部选取导电单元作为导电模型。分析了导电单元的导电特性,得到磁流变弹性体的电导率表达式。制备了磁流变弹性体样品并测试其导电性能,验证了理论表达式的正确性。结果表明,流过磁流变弹性体的电流由传导电流和隧道电流组成,其电导率是与电压相关的非线性函数。The particles inside a magnetorheological elastomer(MRE)align themselves to lines along the direction of magnetic field during fabrication of the MRE.MREs can be conductive because the particle lines act as conducting channel.The conductive unit was constructed as the conducting units according to the characteristic of particle structure inside MREs.The conductive property of the conducting units was analyzed and then the analytical expression for electrical conductivity of MREs was derived.An MRE was fabricated and the conductive property of it was tested,and the expression was verified.The results show that the current flowing through an MRE includes conduction current and tunnel current,and the electrical conductivity of an MRE is a nonlinear function depended on voltage acted on it.

关 键 词：磁流变弹性体 电导率 传导电流 隧道电流 

分 类 号：TB333[一般工业技术—材料科学与工程]