无机材料学报2012，Vol.27Issue(11)：1185-1190,6.DOI:10.3724/SP.J.1077.2012.12012
CaCu3Ti4O12陶瓷深陷阱松弛特性研究
Investigation on Relaxation Properties of Deep Bulk Trap in CaCu3Ti4O12 ceramics
摘要
Abstract
The relaxation properties of deep bulk trap in CaCu3Ti4O12 ceramics prepared by solid state reaction and coprecipitation method were investigated. Dielectric spectra at frequency from 0.1 Hz to 107 Hz and in the temperature range from -100℃ to 100℃ were measured. With the analysis of dielectric spectra at different temperature, deep bulk trap relaxation in double Schottky barrier was studied. The relative position between deep bulk trap and Fermi level changed in double Schottky barrier under small AC signal, resulted in electron emission and capture of deep bulk trap, namely relaxation, which exhibited as a peak in dielectric frequency spectra. Furthermore deep bulk trap level, can be received based on frequency spectra analysis. Compared with the parameters of different samples, it is found that there exist deep bulk traps caused by interior defect at the levels with 0.52 eV and 0.12 eV lower than conduction band. The analysis of dielectric temperature spectra is similar, which can be complement for dielectric frequence spectra analysis.关键词
CaCu3Ti4O12陶瓷/介电频谱/松弛特性/Schottky势垒Key words
CaCu3Ti4O12/ dielectric spectra/ relaxation properties/ schottky barrier分类
信息技术与安全科学引用本文复制引用
杨雁,李盛涛,李晓,吴高林,王谦,鲍明晖..CaCu3Ti4O12陶瓷深陷阱松弛特性研究[J].无机材料学报,2012,27(11):1185-1190,6.基金项目
国家自然科学基金(50972118) （50972118）
