| (Ce0.9Nd0.1)1-xMoxO2-δ (0.00≤x≤0.10)的合成、表征与电性能 |
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| 引用本文： | 夏燕杰,周德凤,孟健. (Ce0.9Nd0.1)1-xMoxO2-δ (0.00≤x≤0.10)的合成、表征与电性能[J]. 物理化学学报, 2009, 25(7): 1415-1420. DOI: 10.3866/PKU.WHXB20090716 |
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| 作者姓名： | 夏燕杰 周德凤 孟健 |
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| 作者单位： | School of Chemistry and Life Science, Changchun University of Technology, Changchun 130012, P. R. China,Key Laboratory of Rare Earth Chemistry and Physics, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R. China |
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| 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24 h, 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0.19 S·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3.96 S·m-1.
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| 关 键 词： | 钕掺杂氧化铈 氧化钼 微观结构 晶界电导率 |
| 收稿时间： | 2008-12-04 |
| 修稿时间： | 2009-03-31 |
Synthesis,Characterization and Electrical Properties of(Ce 0.9Nd0.1)1-xMoxO2-δ(0.00≤x≤0.10) |
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| XIA Yan-Jie,ZHOU De-Feng,MENG Jian. Synthesis,Characterization and Electrical Properties of(Ce 0.9Nd0.1)1-xMoxO2-δ(0.00≤x≤0.10)[J]. Acta Physico-Chimica Sinica, 2009, 25(7): 1415-1420. DOI: 10.3866/PKU.WHXB20090716 |
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| Authors: | XIA Yan-Jie ZHOU De-Feng MENG Jian |
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| Affiliation: | School of Chemistry and Life Science, Changchun University of Technology, Changchun 130012, P. R. China|Key Laboratory of Rare Earth Chemistry and Physics, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R. China |
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| Abstract: | (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)0.98Mo0.02O2-δsintered 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 (Ce0.9Nd0.1)0.98Mo0.02O2-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 (σGB) is 3.96 S·m-1 at 700 ℃) compared to a sample that was not doped with Mo (σt=0.05 S·m-1, σGB=0.19 S·m-1 at 700 ℃). |
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| Keywords: | Neodymium-doped ceria Molybdenumoxide Microstructure Grain boundary conductivity |
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