...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Materials Science >Electrical conduction in La0.9Ba0.1Er1− x Mg x O3−α ceramics
【24h】

Electrical conduction in La0.9Ba0.1Er1− x Mg x O3−α ceramics

机译：La 0.9 Ba 0.1 Er 1-x Mg x O 3-α陶瓷

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

Doubly doped LaErO3 ceramics, La0.9Ba0.1Er1−x Mg x O3−α (x = 0.05, 0.10, 0.15, 0.20), were synthesized by solid-state reaction method and characterized by X-ray diffraction (XRD). The samples have a single orthorhombic perovskite-type structure. The conduction behavior was investigated using various electrochemical methods including AC impedance spectroscopy, gas concentration cell, isotope effect of hydrogen, and hydrogen electrochemical permeation (pumping) in the temperature range of 500–1000 °C. The results indicated that specimens were pure ionic conductors under low oxygen partial pressure (about 10−7–10−20 atm) and mixed conductors of proton, oxide ion, and electron hole under high oxygen partial pressure (about 10−5–1 atm). The pure ion conduction of the ceramics in hydrogen atmosphere was confirmed by electromotive force method of hydrogen concentration cell, and the observed emf values coincided well with the theoretical ones. The conductivity in H2O–Ar atmosphere was higher than that in D2O–Ar atmosphere, exhibiting an obvious isotope effect and proton conduction in water vapor containing atmosphere. It has been confirmed by electrochemical hydrogen permeation (hydrogen pumping) experiment that the ceramics were mainly proton conductors in hydrogen containing atmosphere. Whereas in dry oxygen-containing atmosphere, observed emf values of the oxygen concentration cell were far lower than the theoretical ones, indicating that the ceramics were mixed conductors of electron hole and oxide ion.
机译：双掺杂LaErO 3 陶瓷，La 0.9 Ba 0.1 Er 1-x Mg x O 3-α（x = 0.05，0.10，0.15，0.20），并通过X射线衍射（XRD）表征。样品具有单个斜方钙钛矿型结构。在500–1000°C的温度范围内，使用各种电化学方法研究了导电行为，包括交流阻抗谱，气体浓度池，氢的同位素效应和氢电化学渗透（泵浦）。结果表明，样品是低氧分压（约10 −7 –10 −20 atm）下的纯离子导体，质子，氧化物和电子的混合导体氧气分压高（大约10 −5 –1 atm）的气孔。通过氢浓缩池的电动势法证实了陶瓷在氢气氛中的纯离子传导，并且观察到的电动势值与理论值相吻合。 H 2 O-Ar气氛中的电导率高于D 2 O-Ar气氛，在含水蒸气的气氛中表现出明显的同位素效应和质子传导。通过电化学氢渗透（氢泵）实验已经证实，陶瓷在含氢气氛中主要是质子导体。而在干燥的含氧气氛中，所观察到的氧浓度电池的电动势值远低于理论值，表明陶瓷是电子空穴和氧化物离子的混合导体。

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