T-ZnOw/硅橡胶复合材料的非线性电导特性研究

doi:10.11896/cldb.19060001

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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

Published: 29 May 2020

CLC number:

TM21

Fund:This work was financially supported by the National Natural Science Foundation of China (51171061), and the Open Foundation by Hubei Collaborative Innovation Center for High-efficiency Utilization of Solar Energy (HBSKFZD2014004).

About author:: Wuxin Zhang is a master degree candidate. He is mainly engaged in the research of nonlinear insulating materials.
Lingyun Liu is professor at Hubei University of Technology. He received his Ph. D. degree from Huazhong University of Science and Technology in 2006. He conducted the postdoctoral research at Tsinghua University from 2009 to 2011. His research field mainly involves metamaterials, and nonlinear insulating materials. In recent years, he has undertaken projects such as the National Natural Science Foundation, and published more than 50 papers.

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	ZHANG Wuxin
	LI Zhiheng
	ZHOU Meilin
	YIN Yu
	LIU Lingyun

Cite this article:

ZHANG Wuxin,LI Zhiheng,ZHOU Meilin, et al. Investigation on the Nonlinear Conductance Characteristics of Silicone Rubber Composites[J]. Materials Reports, 2020, 34(12): 12169-12172.

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http://www.mater-rep.com/EN/10.11896/cldb.19060001 OR http://www.mater-rep.com/EN/Y2020/V34/I12/12169

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