热激励去极化电流技术在无机材料中的应用

Application of Thermally Stimulated Depolarization Current Technique in Inorganic Materials

热激励去极化电流(TSDC)测量技术可以提供存在于材料体系中的缺陷类型信息,例如空间电荷、偶极子、陷阱电荷等。通过TSDC谱分析,可研究偶极子和可动离子的性质,以及激活能、弛豫时间、荷电粒子浓度等微观参数,进而更好地理解与缺陷有关的物理本质。本文介绍了当前TSDC技术在无机材料中的应用现状,整理归纳出TSDC技术在线性介质、非线性介质、陶瓷-聚合物复合材料中的研究结果与最新进展,从本质上揭示无机材料中缺陷与性能之间的内在关联。有望拓展TSDC技术在无机材料中的应用,为无机材料微观机制研究提供新思路。

Thermally stimulated depolarization current technique can provide information on defect types that exist in the material systems,such as space charges,dipoles,trap charges and so on.Through TSDC spectral analysis,the properties of dipoles and movable ions,as well as activation energy,relaxation time and charged particle concentration,and other microscopic parameters,can be investigated to better understand the physical nature related to defects.This paper introduces the current application status of TSDC technique in inorganic materials reported at home and abroad.The research results and recent developments of TSDC technique in linear dielectrics,nonlinear dielectrics and ceramic polymer composites are summarized,in order to reveal the inner correlation between defects and properties in inorganic materials.It is expected to expand the application of TSDC technique in inorganic materials and provide new insight for the research on the microscopic mechanism of inorganic materials.