Stress and frequency dependence of the direct piezoelectric effect in ferroelectric ceramics
Stress and frequency dependence of the direct piezoelectric effect in ferroelectric ceramics
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DOI：
10.1063/1.365981
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发表时间：
1997-08-15
影响因子：
3.2
通讯作者：
Damjanovic, D
中科院分区：
文献类型：
--
作者：
Damjanovic, D
结果表明，在弱交变应力下，铁电陶瓷中压电感应电荷与外加应力之间的关系与铁磁材料中磁化与磁场的瑞利定律具有相同的形式。详细论证了瑞利定律对锆钛酸铅（PZT）陶瓷压电效应的适用性。实验结果表明，非180度畴壁的钉住作用是导致压电滞回和压电系数随外加交流应力变化的主要机制。研究了压电系数与驱动应力频率的关系，结果表明，这是由于可逆和不可逆畴壁位移分量的频率频散造成的。对压电相位角的应力依赖性分析表明，压电滞回的贡献不一定是由畴壁的瑞利型位移引起的。研究了一种具有非瑞利型行为的改性钛酸铅组合物的压电性能，并与PZT陶瓷的性能进行了比较。(C) 1997年美国物理研究所。
It is shown that at weak alternating stress the relationship between the piezoelectrically induced charge and applied stress in ferroelectric ceramics has the same form as the Rayleigh law for magnetization versus magnetic field in ferromagnetic materials. Applicability of the Rayleigh law to the piezoelectric effect is demonstrated in detail for lead zirconate titanate (PZT) ceramics. Experimental results indicate that the dominant mechanism responsible for piezoelectric hysteresis and the dependence of the piezoelectric coefficient on the applied ac stress is the pinning of non-180 degrees domain walls. The dependence of the piezoelectric coefficient on the frequency of the driving stress is examined and is shown to be due to the frequency dispersion of both reversible and irreversible components of domain-wall displacement. Analysis of the stress dependence of the piezoelectric phase angle reveals piezoelectric hysteresis contributions that are not necessarily due to Rayleigh-type displacement of domain walls. Piezoelectric properties of a modified lead titanate composition that exhibits non-Rayleigh type behavior are examined and compared with the properties of PZT ceramics. (C) 1997 American Institute of Physics.