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Open Access

Filler Size Effect on Tuning Electrical, Mechanical, and Thermal Properties of Field Grading Composites

Xiaolei Zhao1,2Jun Hu3Xiao Yang4Zhiwen Huang3Xingming Bian4Yuanbao Lin2Jinliang He3( )
Key Laboratory of Control of Power Transmission and Conversion, Ministry of Education, Shanghai Jiao Tong University, Shanghai, 200240 China
Department of Chemistry, University of Oxford, Oxford, OX1 3TA, UK
State Key Laboratory of Power Systems, Department of Electrical Engineering Tsinghua University, Beijing 100084, China
North China Electric Power University, School of Electrical and Electronic Engineering, Beijing 102206, China
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Abstract

A field-grading composite with a low switching field, stable nonlinear conductivity performance, and excellent mechanical and thermal properties was prepared by using hybrid ZnO micro-spherical varistors of different particle sizes as the fillers and silicone rubber as the matrix. The hybrid effects of particle size on the electrical, mechanical, and thermal properties of ZnO micro-spherical varistors composites are investigated. An increase in the ZnO micro-spherical varistor size in the composites will lower the switching field but lead to degradation of the mechanical properties and stability of the nonlinear conductivity properties. The silicone rubber is incorporated with a mixture of hybrid ZnO micro-spherical varistors of different sizes at an optimal mass ratio range exhibited low switching field, stable nonlinear conductivity performance, and excellent mechanical and thermal properties. Our findings are helpful to comprehensively regulate performance of advanced field-grading materials and increase stability and durability of electronic and electrical devices.

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CSEE Journal of Power and Energy Systems
Pages 743-750
Cite this article:
Zhao X, Hu J, Yang X, et al. Filler Size Effect on Tuning Electrical, Mechanical, and Thermal Properties of Field Grading Composites. CSEE Journal of Power and Energy Systems, 2023, 9(2): 743-750. https://doi.org/10.17775/CSEEJPES.2022.05280

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Received: 03 August 2022
Revised: 05 September 2022
Accepted: 10 October 2022
Published: 25 January 2023
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