物理学报Issue(8)：1-6,6.DOI:10.7498/aps.62.087701
CaCu3Ti4O12陶瓷介电模量响应特性的研究
Dielectric modulus response of CaCu3Ti4O12 ceramic∗
摘要
Abstract
The DC conductivity of the CaCu3Ti4O12 ceramic is considerable at low frequency. The dielectric properties of the CaCu3Ti4O12 ceramics are analyzed by dielectric spectrum, and the two relaxation processes are characterized by the dielectric modulus. The two relaxation processes are considered which are dominated by the electronic relaxation of deep bulk traps at the depletion layer edge. The low-frequency and high-frequency relaxation processes are attributed to oxygen-vacancy-related defect and native defect, respectively. It is proved that the modulus response of the CaCu3Ti4O12 ceramic is equivalent to conductivity response at high temperature (low frequency), and the peak value of the M′ is inversely proportional to capacitance. The activation energies calculated by conductivity and modulus are equivalent to each other. The modulus spectrum is more effective to the material which has high DC conductivity at low frequency such as CCTO ceramic.关键词
CaCu3Ti4O12陶瓷/模量/松弛过程/电导Key words
CaCu3Ti4O12 ceramics/dielectric modulus/relaxation polarization/conductivity引用本文复制引用
李盛涛†,王辉,林春江,李建英..CaCu3Ti4O12陶瓷介电模量响应特性的研究[J].物理学报,2013,(8):1-6,6.基金项目
高等学校博士学科点专项科研基金(博导类)(批准号:20110185110014)和中央高校基本科研业务费(批准号:E022050205)资助的课题.*Project supported by the Specialized Research Fund for the Doctoral Program of Higher Education of China (Grant No.20110185110014) and the Fundamental Research Fund for the Central Universities, China (Grant No. E022050205) （博导类）
