...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >Electrical conduction and dielectric relaxation process in Ce_(0.8)Y_(0.2)O_(1 http://Ceo.sYo.2O1 .9) electrolyte system
【24h】

Electrical conduction and dielectric relaxation process in Ce_(0.8)Y_(0.2)O_(1 http://Ceo.sYo.2O1 .9) electrolyte system

机译：Ce_（0.8）Y_（0.2）O_（1 .9）电解质系统中的导电和介电弛豫过程

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

In this work, we present the electrical conductivity and dielectric relaxation studies of 20 mol% yttria doped ceria (Ce_(0.8)Y_(0.2)O_(1.9)) electrolyte prepared by mechanical milling technique. The ac conductivity was found to obey the universal dielectric response at low temperatures. At high temperatures, the conductivity value estimated from the high frequency plateau agreed with the bulk conductivity (sigma_b) obtained form the impedance spectra and the low frequency plateau value agreed with the grain boundary conductivity (sigma_(gb)). Temperature dependence of sigma_band sigma_(gb) gives the activation energies for conduction in the bulk and grain boundary. Two relaxation peaks were observed in the tan delta spectra; the high frequency relaxation peak is due to the bulk conduction and the low frequency peak result from the grain boundary conduction. The migration energy E_M and the energy required for the creation of free oxygen vacancies assisting oxide ion migration E_O is estimated from the resonant frequency and maxima of the tan delta spectra of these relaxation peaks. The sums of these two values in the low and high frequency peaks are nearly equal to the activation energies obtained from the bulk and grain boundary conductivity plot.
机译：在这项工作中，我们介绍了通过机械研磨技术制备的20摩尔％氧化钇掺杂二氧化铈（Ce_（0.8）Y_（0.2）O_（1.9））电解质的电导率和介电弛豫研究。发现交流电导率在低温下服从通用介电响应。在高温下，从高频平稳区估计的电导率值与从阻抗谱获得的整体电导率（sigma_b）相符，而低频平稳峰值与晶界电导率（sigma_（gb））相符。 sigma_band的温度依赖性sigma_（gb）给出了在块体和晶界中传导的活化能。 tanδ光谱中观察到两个弛豫峰。高频弛豫峰是由于体导电引起的，而低频峰是由于晶界导电引起的。根据这些弛豫峰的共振频率和正三角波谱的最大值，估算了迁移能E_M和产生有助于氧化离子迁移的自由氧空位所需的能量E_O。低频和高频峰值中这两个值的总和几乎等于从体积和晶界电导率图获得的活化能。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号