基于频域介电谱和温度谱的活化能计算方法  

Activation Energy Calculation Method Based on Frequency Domain Dielectric Spectrum and Temperature Spectrum

作　　者：王伟[1] 张弛[1] 马小光[2] 刘红磊 任鹏[3] WANG Wei;ZHANG Chi;MA Xiaoguang;LIU Honglei;REN Peng(Electric Power Research Institute of State Grid Tianjin Electric Power Company,Tianjin 300384,China;State Grid Tianjin Electric Power Company,Tianjin 300310,China;State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources,North China Electric Power University,Beijing 102206,China)

机构地区：[1]国网天津市电力公司电力科学研究院,天津300384 [2]国网天津市电力公司,天津300010 [3]华北电力大学新能源电力系统国家重点实验室,北京102206

出　　处：《绝缘材料》2020年第7期88-93,共6页Insulating Materials

基　　金：国家电网公司科技项目(KJ19-1-29)。

摘　　要：为了明确介电谱法求取活化能中平移基准的选取原则,搭建了环氧树脂试样介电谱测试平台,分析了现有频-温平移法存在的问题,结合实例提出了平移基准的选取原则。结果表明:若测试频段存在弛豫峰,则选择弛豫峰特征频率附近的介质损耗因数(tanδ)或复电容虚部(C″)作为平移基准;若测试频段无弛豫峰且频率较低,则选择复电容实部(C′)作为平移基准。In order to clarify the selection principle of translation reference for calculating activation energy by dielectric spectroscopy method, we established a dielectric spectroscopy test platform for epoxy resin samples. The problems of existing frequency-temperature translation method was anlalyzed, and the selection principle of translation reference was proposed combined with examples. The results show that if there is a relaxation peak in the test frequency band, the dielectric loss factor(tanδ) or the imaginary part of complex capacitance(C″) near the characteristic frequency of relaxation peak is selected as the translation reference. If there is no relaxation peak in the test frequency band and the frequency is low,the real part of complex capacitance(C′) is selected as the translation reference.

关 键 词：活化能 介电谱 频-温平移法 平移基准 

分 类 号：TM215[一般工业技术—材料科学与工程]