| 压电陶瓷的极化反转过程 |
| |
| 引用本文： | 凌志远,魏茂仁.压电陶瓷的极化反转过程[J].功能材料,1998,29(5):530-533. |
| |
| 作者姓名： | 凌志远 魏茂仁 |
| |
| 作者单位： | 华南理工大学材料学院电子材料科学与工程系!广州，510641，华南理工大学材料学院电子材料科学与工程系!广州，510641，华南理工大学材料学院电子材料科学与工程系!广州，510641 |
| |
| 摘 要： | 利用阻抗分析仪和重复迭代法，对Ｐｂ（Ｍｇ１／３Ｎｂ２／３）０．１２５Ｔｉ０．４２Ｚｒ０．４５５Ｏ３压电陶瓷的极化反转过程进行了研究。实验数据显示出了铁电畴随电场变化的整个开关过程，发现极化反转前后压电性有着明显的不对称性，这一异常现象是和场诱应变、电滞回线数所相互对应的。经比较研究后认为，影响极化反转前后压电对称性的机理是空间电荷在晶粒表面积聚形成内偏置电场，由此建立的理论模型可以作出合理的解释。
|
| 关 键 词： | 极化反转 压电陶瓷 压电性 空间电荷 |
Polarization Reversal Process in Piezoelectric Ceramics |
| |
| Ling Zhiyuan, Xiong Maoren, Chen Kai.Polarization Reversal Process in Piezoelectric Ceramics[J].Journal of Functional Materials,1998,29(5):530-533. |
| |
| Authors: | Ling Zhiyuan Xiong Maoren Chen Kai |
| |
| Abstract: | By means of impedance analyzer and iterative method, the polarization reversal process of Pb (Mg1/3Nb2/3)0.125Ti0.42Zr0.455O3 piezoelectric ceramics was investigated in this paper. The experimental results figured out the entire process of ferroelectric domains switching with electric field. Compared the piezoelectricity before reversal with that after reversal, an evident asymmetry was observed, this phenomenon was in correspondence with field induced strain and D-E hysteresis loop. After taking a careful consideration, we think,the mechanism of piezoelectric asymmetry is due to internal bias field formed by space charges accumulated on the grain surface, the theoretical model building on this mechanism can play a reasonable explanation. |
| |
| Keywords: | polarization reversal piezoelectricity accumulation space charge internal bias field |
| 本文献已被 CNKI 维普 等数据库收录！ |
