【作者】 周德凤； 薄其兵； 王秋艳； 曹学强； 孟健；

【Author】 Zhou Defeng , Bo Qibing, Wang Qiuyan, Cao Xueqiang, Meng Jian(l.Key Laboratory of Rare Earth Chemistry and Physics, Changchun Institute of Applied Chemistry, ChineseAcademy of Sciences, Changchun 130022, China)(2.College of Chemistry and Chemical Engineering,JinanUniversiry,3man 250000, China) (3.Changchun College of Chinese Medicine,Changchun 130022, China)

【机构】 中国科学院长春应用化学研究所稀土化学与物理重点实验室； 济南大学化学化工学院； 长春中医学院；

【摘要】 采用溶胶.凝胶方法合成系列新型氧化物Ce6-xSmxMoO15-δ.通过TG-DTA、XRD、XPS等手段对物质进行结构表征。结果表明:氧化物的最低成相温度为400℃,具有立方莹石结构。Sm的掺杂增加了氧离子空位浓度,改善母体的电导率。烧结温度为800℃时,Ce5.2Sm0.8MoO15-δ的电导率高达2.2×10-3 S·cm-1。是具有潜在应用价值的新型固体氧化物燃料电池材料。更多还原

【Abstract】 A new Solid State Electrolyte series of oxides Ce6-xSmxMoO15-δ(0.0 < x < 1.2) were synthesized by sol-gel method. The precursors and the resultant oxide powders were characterized by differential thermal analysis/thermogravimetry (DTA/TG), X-ray Diffraction (XRD) and X-ra) Photoelectron Spectroscopy (XPS). The formation temperature of powders has been found to be as low as 4 0℃. Ce6-xSmxMoOi5-δ crystallized to fluorite-related cubic structure. The electrical conductivity of samples was investigated by using AC impedance spectroscopy, it showed that the presence of Sm related with the oxygen-ion conductivity, and the highest oxygen-ion conductivity was found in Ce6-xSmxMoO15-δ (x = 0.8) ranging from 2.2×10-3 S·cm-1 at 800℃. This kind of material shows a potential application in the intermediate-temperaru -e solid oxide fuel cells (SOFCs).更多还原