钛酸锶钡陶瓷的铁电极化疲劳效应  

Polarization Fatigue in Barium Strontium Titanate Ceramics

作　　者：刘俊刁[1] 陈如麒[2] 沈韩[3] 陈敏[3] 姚李兵[3] 

机构地区：[1]惠州学院电子科学系,广东惠州516007 [2]华南农业大学公共基础课实验教学中心,广东广州510642 [3]中山大学物理科学与工程技术学院,广东广州510275

出　　处：《中山大学学报（自然科学版）》2011年第3期31-34,共4页Acta Scientiarum Naturalium Universitatis Sunyatseni

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

摘　　要：用微分电滞回线谱分析方法研究了钛酸锶钡Ba0.95Sr0.05TiO3(BST)陶瓷圆片的铁电极化疲劳效应,发现其疲劳过程可以分成三个阶段,当反转次数在105-106次时出现老化效应,反转106-108时出现疲劳效应,反转108次以上则样品完全疲劳,铁电性几乎消失。Differential hysteresis loop of Ba0.95Sr0.05TiO3 ferroelectric ceramics has been measured.It is found that the polarization fatigue in BST ceramics can be divided into three stages.The first stage when reversal number N is between 105 to 106 is dominated by aged effects.In the second stage where N is from 106 to108,fatigue effect appears.In the third stage when N is larger than 108,the sample is almost totally fatigued and can not be considered as a ferroelectrics.

关 键 词：钛酸锶钡陶瓷 微分电滞回线 极化疲劳 

分 类 号：O482.4[理学—固体物理]