锆钛酸铅的纯铁电回线分析  

Pure Ferroelectric Hysteresis Loop of Lead Zirconate Titanate Ceramics

作　　者：朱贵文[1] 沈韩[2] 刘俊刁[3] 阮凯斌[2] 陈敏[2] 

机构地区：[1]广东药学院物理与电子学教研室,广东广州510006 [2]中山大学物理科学与工程技术学院,广东广州510275 [3]惠州学院电子科学系,广东惠州516007

出　　处：《中山大学学报（自然科学版）》2008年第4期47-50,共4页Acta Scientiarum Naturalium Universitatis Sunyatseni

基　　金：广东省自然科学基金博士科研启动基金资助项目(05300580);惠州市科技计划资助项目(2005G49)

摘　　要：在0～150℃范围测量了Pb（Zr0.48Ti0.52）O3（PZT）陶瓷薄片的电滞回线和微分电滞回线。发现电滞回线高度在升温过程中出现升高的现象，这与铁电唯象理论相矛盾。为此提出精确测定纯铁电参数的方法，该方法可分离出回线中直流电导，非铁电性电容的影响，从而得到纯铁电效应的信号。实验结果与PZT中准同型相界的存在相吻合。Hysteresis loop and differential hysteresis loop of Pb （Zr0 48Ti0. 52 ）03 （PZT） ceramics have been measured in the temperatures from 0 to 150℃. It is found that with the increase of temperatures, the height of hysteresis loop becomes larger, which is conflictive to the phenomenological theory of ferroelectricity. For this reason, a more precise measuring method for obtaining pure ferroelectric effect based on differential hysteresis loop is proposed. Using this method, the influence of DC conductance, non-ferroelectric linear capacitance can be eliminated, and obtain the signal of pure ferroelectric effects. The experimental result is in agreement with the existence of morphotropic phase boundary in PZT.

关 键 词：电滞回线 铁电参数 锆钛酸铅 

分 类 号：O482.4[理学—固体物理]