论文标题
氧缺损在高度缺陷的毒ceria的电化学特性上的作用
The Role of Oxygen Defects on the Electro-Chemo-Mechanical Properties of Highly Defective Gadolinium Doped Ceria
论文作者
论文摘要
鉴于最近在有缺陷的荧光岩中发现了巨型电曲，在这里我们研究了氧缺陷谷物组成的机械，电化学和机电特性之间的相互作用，这是在低温下GD掺杂的效果。高度致密的多晶陶瓷是作为微米大小的晶粒以最小化的晶界范围制备的。电化学离子迁移表明，掺杂控制样品中氧空位的配置。出乎意料的是，我们观察到机电活性取决于氧空位构型，而不是其名义浓度。室温下的主要蠕变表明随着氧气缺陷的增加，粘弹性趋势的下降。
In light of the recent discovery of giant electrostriction in defective fluorites, here we investigate the interplay between mechanical, electrochemical and electromechanical properties of oxygen defective ceria compositions as the effect of Gd-doping at low temperatures. Highly dense polycrystalline ceramics are prepared as micron-size grains with a minimized grain boundary extent. Electrochemical ionic migration reveals that doping controls the configuration of oxygen vacancies in the samples. Unexpectedly, we observe that electromechanical activity depends on oxygen vacancy configuration rather than on its nominal concentration. The primary creep at room temperature indicates a declining viscoelastic trend with increasing oxygen defects.
