Study on rare earth/alkaline earth oxide-doped CeO_2 solid electrolyte

作     者：YAN Kai ZHEN Qiang Song Xiwen YAN Kai1), ZHEN Qiang1, 2, and Song Xiwen3) 1) School of Materials Science and Engineering, Shanghai University, Shanghai 200072, China 2) Research Center of Nanoscience and Nanotechnology, Shanghai University, Shanghai 200444, China 3) School of Materials Science and Engineering, Inner Mongolia University of Science and Technology, Baotou 014010, China

作者机构：School of Materials Science and Engineering Shanghai University Shanghai 200072 China Research Center of Nanoscience and Nanotechnology Shanghai Univeesity Shanghai 200444 China School of Materials Science and Engineering Inner Mongolia University of Science and Technology B aotou 014010 China 

出 版 物：《Rare Metals》 (稀有金属（英文版）)

年 卷 期：2007年第26卷第4期

页      面：311-316页

核心收录：

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

主　　题：doped ceria rare earth/alkaline earth oxide solid electrolyte conductivity effective index 

摘      要：Five types of rare earth/alkaline earth oxide-doped CeO2 superfine-powders were synthesized by a low-temperature combustion technique. The relevant solid electrolyte materials were also sintered by pressureless sintering at different temperatures. The results of X-ray diffraction and transmission electron microscopy showed that the grain size of the powders was approximately 20-30 nm, and rare earth/alkaline earth oxides were completely dissolved into ceria-based solid solution with fluorite structure. The electrical conductivities of the SmzO3-CeO2 system were measured by the ac impedance technique in air at temperatures ranging from 513-900℃. The results indicated that the ionic conductivities of Srno.2oCe0.8Ol.875 solid electrolyte increase with increasing sintering temperature, and the relationship between the conductivities and measuring temperature obeys the An＇henius equation. Then the SmzO3-CeO2 material was further doped with other rare earth/alkaline earth oxide, and the conductivities improve with the effective index.