@article{Shen2025, 
author = {Zikui Shen and Chi Xu and Xilin Wang and Zhenyu Xin and Zhidong Jia},
title = {The Impact of Electric Field Treatment on Nonlinear Conductivity of Tetra-needle-shaped ZnO Whisker/Carbon Fiber/Liquid Silicone Rubber Composites},
year = {2025},
journal = {CSEE Journal of Power and Energy Systems},
volume = {11},
number = {2},
pages = {900-908},
keywords = {Carbon fiber, electric field, electrical properties, nonlinear conductive, polymeric composites, T-ZnOw},
url = {https://www.sciopen.com/article/10.17775/CSEEJPES.2021.00470},
doi = {10.17775/CSEEJPES.2021.00470},
abstract = {Nonlinear electrically conductive composites are widely used for electric field grading in HVDC systems. However, the composites prepared using current methods can rarely simultaneously meet the requirements of a high nonlinear coefficient, low switching field and low filler content, which limits their application scope. In this study, by applying a 10-kHz AC electric field during preparation, the prepared tetra-needle-shaped ZnO whisker/carbon fiber/liquid silicone rubber (T-ZnOw/CF/LSR) composites can be implemented in a manner to meet the above three requirements. The electric field-assisted LSR composites filled with 20 phr T-ZnOw and 5 phr CF can have a switching field as low as 420 V/mm and a nonlinear coefficient up to 11.7. The mechanism for the electric field-assisted enhancement of the nonlinear characteristics of the T-ZnOw/CF/LSR ternary hybrid system is explained based on the electromechanics of the suspended particles. The nonlinear characteristics and the filler content do not present a positive correlation, and a low (< 10 phr) or high (> 30 phr) filler content leads to decreased nonlinear characteristics in the composites. Compared with LSR, the electric field-assisted composites introduce a large number of shallow traps with increased trap density and reduced trap energy levels.}
}