现代应用物理2025，Vol.16Issue(4)：141-147,7.DOI:10.12061/j.issn.2095-6223.202411006
基于晶界微观结构的ZnO压敏电阻电气特性仿真分析
Simulation of Electrical Properties of ZnO Varistors Based on Grain Boundary Microscopic Structure
摘要
Abstract
The operating environment of modern power systems is complex,and the power and communication equipment are susceptible to electromagnetic interference and damage.ZnO varistors,renowned for their superior nonlinear current-voltage(I-V)characteristics,are extensively employed to protect sensitive electronic devices.The electrical properties of ZnO varistors determined by grain boundary characteristics and microstructure govern their efficacy in suppressing electromagnetic pulse(EMP)interference.To enhance the suppression effect of ZnO varistors on electromagnetic interference,this paper employs a Voronoi network model to simulate the microstructure of ZnO varistors,establishing a grain boundary partition model and a micro equivalent circuit that accounts for intergranular current shunting effect,obtaining the equivalent circuit of the varistor as a whole.Based on the model,this paper investigates the effect of the proportion of thick grain boundary phase,impedance of the thick grain boundary phase,and the proportion of direct contact areas on the macroscopic electrical performance of ZnO varistors.The results show that reducing the proportion of the thick grain boundary phase and increasing its impedance can enhance the performance of the varistors.In contrast,an increase in the proportion of direct contact areas has a negligible impact on electrical performance initially,but when it reaches 10-6,several electrical performance of ZnO varistor deteriorate significanty.This paper provides theoretical support for the application of varistors in the field of electromagnetic interference suppression.关键词
电磁干扰抑制/ZnO压敏电阻/晶界分区模型/Voronoi网络/宏观电气特性Key words
electromagnetic interference suppression/ZnO varistor/grain boundary partition model/Voronoi network/macroscopic electrical properties分类
能源科技引用本文复制引用
程鑫,崔崇雨,吴红梅,郭敬科,殷越,孟鹏飞..基于晶界微观结构的ZnO压敏电阻电气特性仿真分析[J].现代应用物理,2025,16(4):141-147,7.基金项目
国家自然科学基金资助项目(52107158) （52107158）
四川省自然基金资助项目(2024NSFSC0116) （2024NSFSC0116）
