期刊
SOLID STATE IONICS
卷 331, 期 -, 页码 18-21出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.ssi.2018.12.013
关键词
Impedance spectroscopy; DFRT; Grain boundary properties; Doped ceria
资金
- Israel Ministry of Science & Technology (MIA program) [3-12944]
- Israel Science Foundation [938/15]
- Grand Technion Energy Program
- Lady Davis Fellowship
The electrical conductivity of Ce0.90Gd0.10O1.95 oxide ion conductor is studied, emphasizing distribution function of relaxation times (DFRT) analysis of impedance spectroscopy measurements. The corresponding powder has been prepared by co-precipitation method and sintered at 1300 degrees C. The formation of the fluorite phase is confirmed by X-ray diffraction. The temperature dependence of ionic conductivity has been studied at different bias voltages. The impedance spectra are analysed by impedance spectroscopy genetic programming (ISGP) that finds an analytic form of the DFRT. Interestingly, both the grain and grain boundary conductivities can be identified at room temperature by analysing the DERTs. At higher temperatures and higher bias voltages, the grain boundary diffusion process of oxygen ions is identified. Both the grain and grain boundary activation energies are bias independent.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据