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材料导报  2020, Vol. 34 Issue (12): 12169-12172    https://doi.org/10.11896/cldb.19060001
  高分子与聚合物基复合材料 |
T-ZnOw/硅橡胶复合材料的非线性电导特性研究
张吴欣, 李志恒, 周梅琳, 尹玉, 刘凌云
湖北工业大学太阳能高效利用及储能运行控制湖北省重点实验室,武汉 430068
Investigation on the Nonlinear Conductance Characteristics of Silicone Rubber Composites
ZHANG Wuxin, LI Zhiheng, ZHOU Meilin, YIN Yu, LIU Lingyun
Hubei Key Laboratory for High-efficiency Utilization of Solar Energy and Operation Control of Energy Storage System, Hubei University of Technology, Wuhan 430068, China
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摘要 针对目前许多绝缘装置存在的电场分布不均问题,采用具有自适应非线性电导特性的材料进行均压是一种有效手段。本工作使用具备独特三维结构的四针状氧化锌晶须(T-ZnOw)为无机填料对硅橡胶基体进行填充,制备了不同体积分数的T-ZnOw/硅橡胶复合材料,并对其电导特性、介电性能、拉伸强度进行了测试。研究结果表明:复合材料的逾渗阈值较低,仅为5%(体积分数);当T-ZnOw的体积分数低于5%时,复合材料不具备非线性电导特性;当T-ZnOw的体积分数大于5%时,复合材料具有良好的非线性电导特性;当达到临界场强E0时,复合材料的电导率呈指数增加,且随着T-ZnOw体积分数的增加,复合材料的临界场强E0值逐渐减小。此外,随着T-ZnOw体积分数的增加,复合材料的介电常数增大。加入适当体积分数的T-ZnOw填料有助于改善复合材料的拉伸强度。
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张吴欣
李志恒
周梅琳
尹玉
刘凌云
关键词:  四针状氧化锌晶须  硅橡胶  非线性电导  逾渗阈值  拉伸强度    
Abstract: In view of the uneven distribution of electric fields in many insulating devices, it is effective to make use of nonlinear conducting materials as field grading materials. In this work we employed T-ZnOw as inorganic fillers, and the silicone rubber as matrix. T-ZnOw/silicone rubber composites with different volume fractions were prepared, and their electrical conductivity, dielectric properties and stretching strength were measured. The results show that the percolation threshold of the composite is about 5vol%. Only when the volume fraction of T-ZnOw is above 5%, the composite materials can exhibit excellent nonlinear conductance characteristics. When a certain field strength value (critical field strength E0) is reached, the electrical conductivity can be rapidly increased, which shows an apparent nonlinear conductivity. As the increase of volume fraction of T-ZnOw, the E0 of the nonlinear electrical conductivity of the composite decreases correspondingly. The dielectric constants of the composite increase with the volume fraction of T-ZnOw. The tensile strength of the composite materials can be improved with an appropriate volume fraction.
Key words:  T-ZnOw    silicone rubber    nonlinear conductivity    percolation threshold    tensile strength
               出版日期:  2020-06-25      发布日期:  2020-05-29
ZTFLH:  TM21  
基金资助: 国家自然科学基金(51171061);太阳能高效利用湖北省协同创新中心开放基金(HBSKFZD2014004)
通讯作者:  liulingyun@hbut.edu.cn   
作者简介:  刘凌云,湖北工业大学教授,2006年于华中科技大学获工学博士学位,2009—2011年在清华大学材料系从事博士后研究工作。研究领域主要涉及人工电磁介质以及非线性绝缘材料等。近几年先后承担了国家自然科学基金、总装预研基金、湖北省教育厅基金等项目,发表了五十余篇学术论文。
引用本文:    
张吴欣, 李志恒, 周梅琳, 尹玉, 刘凌云. T-ZnOw/硅橡胶复合材料的非线性电导特性研究[J]. 材料导报, 2020, 34(12): 12169-12172.
ZHANG Wuxin, LI Zhiheng, ZHOU Meilin, YIN Yu, LIU Lingyun. Investigation on the Nonlinear Conductance Characteristics of Silicone Rubber Composites. Materials Reports, 2020, 34(12): 12169-12172.
链接本文:  
http://www.mater-rep.com/CN/10.11896/cldb.19060001  或          http://www.mater-rep.com/CN/Y2020/V34/I12/12169
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