(Ce_(0.9)Nd_(0.1))_(1-x)Mo_xO_(2-δ)(0.00≤x≤0.10)的合成、表征与电性能(英文)  

Synthesis, Characterization and Electrical Properties of (Ce_(0.9)Nd_(0.1))_(1-x)Mo_xO_(2-δ)(0.00≤x≤0.10)

作　　者：夏燕杰[1] 周德凤[1] 孟健[2] 

机构地区：[1]长春工业大学化学与生命科学学院,长春130012 [2]中国科学院长春应用化学研究所,稀土化学与物理国家重点实验室,长春130022

出　　处：《物理化学学报》2009年第7期1415-1420,共6页Acta Physico-Chimica Sinica

基　　金：supported by the National Natural Science Foundation of China (20671088, 20871023) ;Science Research Foundation of Jilin Province, China (20070510)~~

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.（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℃）.

关 键 词：钕掺杂氧化铈 氧化钼 微观结构 晶界电导率 

分 类 号：O611.4[理学—无机化学]