Mechanical stability of piezoelectric properties in ferroelectric perovskites
Mechanical stability of piezoelectric properties in ferroelectric perovskites
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DOI：
10.1063/1.4919815
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发表时间：
2015-05
影响因子：
3.2
通讯作者：
F. H. Schader;M. Morozov;E. T. Wefring;T. Grande;K. Webber
中科院分区：
文献类型：
--
作者：
F. H. Schader;M. Morozov;E. T. Wefring;T. Grande;K. Webber
在25 °C ~ 450 °C温度范围内，研究了单轴压应力对硬、软Pb（Zr，Ti）O3在准同型相界小信号直接压电系数的影响.的应力和温度依赖的压电数据表明，应力是能够直接或间接地修改晶格中的极性缺陷的取向，并减少内部偏置场。在较高的温度下，极性缺陷的迁移率被发现增加，对应于一个两步减少的直接压电系数和减少的频率色散。淬火实验被用来阐明的作用，内部偏置场的应力依赖的压电响应。
The influence of uniaxial compressive stress on the small signal direct piezoelectric coefficient of hard and soft Pb(Zr,Ti)O3 at the morphotropic phase boundary was investigated as a function of temperature from 25 °C to 450 °C. The stress- and temperature-dependent piezoelectric data indicate that stress is capable of either directly or indirectly modifying the orientation of polar defects in the crystal lattice and reduce the internal bias field. At higher temperatures, the mobility of polar defects was found to increase, corresponding to a two-step decrease in the direct piezoelectric coefficient and a decrease in the frequency dispersion. Quenching experiments were used to elucidate the role of the internal bias field on the stress-dependent piezoelectric response.