A model for large electrostrictive actuation in ferroelectric single crystals
A model for large electrostrictive actuation in ferroelectric single crystals
复制标题
铁电单晶大电致伸缩驱动模型
DOI：
10.1016/j.ijsolstr.2006.07.020
复制
发表时间：
2007
影响因子：
3.6
通讯作者：
K. Bhattacharya
中科院分区：
文献类型：
--
作者：
D. Shilo;E. Burcsu;G. Ravichandran;K. Bhattacharya
基于铁电晶体在复合机电载荷作用下的90°畴变，最近已在实验上证实了一种新的大电致伸缩驱动模式。在本文中，我们开发了一个模型，这种现象，假设一个合理的安排畴壁和制定这些壁的运动方程。该模型捕捉到的实验中观察到的功能，揭示了显着的作用，在加载框架和晶体表面之间的界面摩擦，并预测，减少摩擦将允许在较低的机械负荷较大的应变。
A new mode of large electrostrictive actuation, based on 90° domain switching in ferroelectric crystals subjected to combined electromechanical loading, has recently been experimentally demonstrated. In this paper, we develop a model for this phenomenon by assuming a reasonable arrangement of domain walls and formulating equations of motion for these walls. The model captures most of the features observed in the experiments, reveals the significant role of friction at the interfaces between the loading frame and the crystal surfaces, and predicts that a reduction of friction will allow larger strains at lower mechanical loads.