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中文摘要：
采用溶胶-凝胶法合成（Ce0.9Nd0.1）1-xMoxO2-δ（x=0.00、0.02、0.05、0.10）氧化物,通过X射线衍射（XRD）、场发射扫描电镜（FESEM）等手段对氧化物进行结构表征,交流阻抗谱测试电性能.结果表明：所有样品均为单一萤石立方结构;少量MoO3的加入提高了材料的致密性,降低了材料的总电阻、晶界电阻和晶界电阻在总电阻中所占比例,提高了材料的电导率.1200℃烧结样品24h,测试温度700℃时,（Ce0.9Nd0.1）1-xMoxO2-δ（x=0.00）总电导率和晶界电导率分别为0.05和0.19S·m-1,掺Mo材料（Ce0.9Nd0.1）1-xMoxO2-δ（x=0.02）的总电导率和晶界电导率分别为2.42和3.96S·m-1.
英文摘要：
（Ce0.9Nd0.1）1-xMoxO2-δ（x=0.00, 0.02, 0.05, 0.10） were prepared by a modified sol-gel method. Sample structures were characterized by X-ray diffraction （XRD） and field-emission scanning electron microscopy （FESEM）. The ionic conductivity was systematically studied over a temperature range from 350 to 800 ℃ in air using impedance spectroscopy. Results showed that the materials were single phase with a cubic fluorite structure. A higher relative density was obtained for （Ce0.9Nd0.1）0.50Mo0.02O2-δ sintered at 1200℃ for 24 h compared to the relative density of Ce0.9Nd0.1O2-δ. Impedance spectroscopy showed a sharp increase in conductivity for the ceria system that contained a small amount of MOO3. The solution （Ce0.0Nd0.1）0.9Mo0.01O2-δ was shown to be the best conducting phase as it had the highest conductivity （total conductivity （σt） is 2.42 S·m-1, grain boundary conductivity （σCB） is 3.96 S·m-1 at 700℃ compared to a sample that was not doped with Mo （σr=0.05 S·m-1, σGB=0.19 S·m^-1 at 700℃）.
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