Electrostrictive Effect of Materials under High Pressure Revealed by Electrochemical Impedance Spectroscopy
Electrostrictive Effect of Materials under High Pressure Revealed by Electrochemical Impedance Spectroscopy
复制标题
电化学阻抗谱揭示高压下材料的电致伸缩效应
DOI：
10.1021/acs.jpcc.1c01020
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发表时间：
2021-04-20
影响因子：
3.7
通讯作者：
Han, Yonghao
中科院分区：
文献类型：
--
作者：
Han, Tao;Liu, Hao;Han, Yonghao
由于电致伸缩材料是完全密封的，被限制在金刚石压砧单元（DAC）中，它们的应变和电场激发的原子位移不能通过常规测量原位测量。因此，高压下材料电致伸缩特性的实验研究成为一个尚未开发的领域。本文利用电化学阻抗谱研究了CaZrO_3在高压下的电致伸缩效应。在阻抗谱中，电致伸缩效应以电感环的形式清晰地呈现出来。用等效电路法拟合，可以得到应变及其随压力变化的信息。
Because electrostrictive materials are completely sealed and confined in a diamond anvil cell (DAC), their strain and atomic displacement excited by electric field cannot be in situ measured by general measurements. Therefore, an experimental study on the electrostrictive properties of materials under high pressures becomes an unexploited field. In this paper, we study the electrostrictive effect of CaZrO3 under high pressures with electrochemical impedance spectroscopy. In the impedance spectra, the electrostrictive effect is presented clearly in the form of an inductive loop. Fitted with the equivalent circuit method, information about strain and its evolution with pressure can be obtained.