Electrical properties of the GdSmZr₂O₇ ceramic under different sintering conditions

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• 作者：Zhan-Guo Liu^a ; ^b ; ^c ; ^{zgliu@hit.edu.cn} ; Jia-Hu Ouyang^a ; ^{ouyangjh@hit.edu.cn} ; Ke-Ning Sun^b ; ^c ; Yu Zhou^a
• 关键词：Rare-earth zirconate ; Pyrochlore ; Solid electrolyte ; Impedance spectroscopy ; Electrical conductivity
• 刊名：Journal of Power Sources
• 出版年：2012
• 期刊代码：58_03787753
• 类别：ce
• 出版时间：15 July, 2012
• 卷：210
• 期：Complete
• 页码：96-100
• 文件大小：729 K

摘要

The GdSmZr₂O₇ ceramic is prepared by pressureless-sintered method under different conditions as a possible solid electrolyte. The crystal structure, microstructure and electrical properties are characterized by the X-ray diffraction, field-emission scanning electron microscopy and ac impedance spectroscopy, respectively. The GdSmZr₂O₇ ceramic exhibits a single phase of the pyrochlore-type structure. The total conductivity of the GdSmZr₂O₇ ceramic obeys the Arrhenius relation, and gradually increases with increasing temperature from 723 to 1173 K. The GdSmZr₂O₇ ceramic is an oxide-ion conductor in the oxygen partial pressure range of 1.0 脳 10^鈭? to 1.0 atm at all test temperature levels. According to the experimental results of the present work, the maximum value of the total conductivity for the GdSmZr₂O₇ ceramic is about 1.01 脳 10^鈭? S cm^鈭? at 1173 K.