CaCu_3Ti_4O_(12)的驰豫特性  

Relaxation Properties of CaCu_3Ti_4O_(12) Ceramics

作　　者：尤景汉[1] 张庆国[1] 琚伟伟[1] 李立本[1] 

机构地区：[1]河南科技大学理学院,河南洛阳471003

出　　处：《河南科技大学学报（自然科学版）》2009年第1期4-6,共3页Journal of Henan University of Science And Technology:Natural Science

基　　金：河南省教育厅自然科学基金项目(2007140004);河南科技大学青年基金项目(2007QN060)

摘　　要：利用固态反应办法制备了CaCu_3Ti_4O_(12)(CCTO)陶瓷样品;从德拜弛豫理论出发,通过介电温度谱得到弛豫时间温度谱,计算了样品的弛豫激活能H。结果表明激活能与频率无关,而弛豫时间因子τ0则与频率有关,显示出样品的弛豫特性并非来源于激活能H,而是来源于弛豫时间因子τ0的分布。CaCu3Ti4O12(CCTO) ceramics were prepared by the traditional solid-state reaction method.Based on the Debye relaxation theory,the relaxation activation energy H and the relaxation time factor to can be drawn from the temperature dependent on the relaxation time which was derived from the relation of dielectric to temperature.Results indicated the activation energy has no dependence on the frequency,while the relaxation time factor has more dependence on the frequency.So the conclusion can be drawn that the relaxation mechanism of the sample comes from the relaxation time factor but no activation energy.

关 键 词：CACU3TI4O12 损耗因子 弛豫时间 激活能 

分 类 号：O487[理学—固体物理]