高电压技术2025，Vol.51Issue(8)：3785-3796,12.DOI:10.13336/j.1003-6520.hve.20250865
多物理场作用下材料体电阻率变化规律
Variation Law of Material Volume Resistivity Under the Action of Multiple Physical Fields
摘要
Abstract
This paper conducts an experimental study on the variation law of material volume resistivity in a mul-ti-physics field environment.Firstly,an experimental system under the combined action of pressure,temperature,relative humidity and electric field is established.Then,the volume resistivity response characteristics of typical non-metallic ma-terials are analyzed.The experiment results show that the volume resistivity of non-metallic materials decreases with the increase of electric field intensity,and the reduction amplitude remains one order of magnitude within the range of the experimental electric field intensity.The volume resistivity of non-metallic materials decreases by 2 to 4 orders of magni-tude with the increase of temperature.Under humidity conditions,the volume resistivity of the material significantly decreases due to water penetration and ion dissociation.The percolation threshold appears in the range of 40％～60％rela-tive humidity(RH),and the pressure synergy effect further reduces the percolation threshold.Pressure reduces volume resistivity by compressing the band gap,but its influence amplitude(＜one order of magnitude)is weaker than that of temperature and relative humidity.In the coupling of multiple physical fields under experimental conditions,the influence weights of temperature and relative humidity on volume resistivity are significantly higher than those of pressure,and the synergistic effect of high temperature-high pressure or high humidity-high pressure will accelerate the decrease of resis-tivity.This research provides a crucial basis for the material selection design and performance evaluation of equipment in complex environments.关键词
多物理场/体电阻率/载流子/热缺陷/三电极Key words
multiphysics field/volume resistivity/charge carrier/thermal defect/three-electrode system引用本文复制引用
周帅,刘尚合,胡小锋,王雷,王莹莹..多物理场作用下材料体电阻率变化规律[J].高电压技术,2025,51(8):3785-3796,12.基金项目
国家自然科学基金(62371471).Project supported by National Natural Science Foundation of China(62371471). （62371471）
