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高等学校化学研究 ›› 2012, Vol. 28 ›› Issue (1): 9-13.

• Articles • 上一篇    下一篇

Effects of MoO3 Amounts on Sintering and Electrical Properties of Ce0.8Nd0.2O1.9

ZHOU De-feng1*, ZHAO Gui-chun1, YANG Mei1, XIA Yan-jie2, MENG Jian2   

  1. 1. School of Chemistry and Life Science, Changchun University of Technology, Changchun 130012, P. R. China;
    2. State Key Laboratory of Rare Earth Resources Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R. China
  • 收稿日期:2010-12-14 修回日期:2011-06-13 出版日期:2012-01-25 发布日期:2011-12-27
  • 基金资助:

    Supported by the National Natural Science Foundation of China(No.20871023) and the Jilin Provincial Science Research Foundation, China(Nos.20070510, 20101549).

Effects of MoO3 Amounts on Sintering and Electrical Properties of Ce0.8Nd0.2O1.9

ZHOU De-feng1*, ZHAO Gui-chun1, YANG Mei1, XIA Yan-jie2, MENG Jian2   

  1. 1. School of Chemistry and Life Science, Changchun University of Technology, Changchun 130012, P. R. China;
    2. State Key Laboratory of Rare Earth Resources Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R. China
  • Received:2010-12-14 Revised:2011-06-13 Online:2012-01-25 Published:2011-12-27
  • Supported by:

    Supported by the National Natural Science Foundation of China(No.20871023) and the Jilin Provincial Science Research Foundation, China(Nos.20070510, 20101549).

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摘要： The high purity (Ce0.8Nd0.2O1.9)1-x(MoO3)x(x=0, 0.005, 0.010, 0.020; Ce0.8Nd0.2O1.9=NDC) solid solutions were prepared by modified sol-gel method. The structures and electric conductivities were characterized by X-ray diffraction(XRD), field-emission scanning electron microscopy(FESEM) and electrochemical impedance spectroscopy( EIS). The XRD results show that the materials were pure phase with a cubic fluorite structure. Compared to the undoped-NDC samples, MoO3 doped-NDC showed higher sintered density(over 96%) at reduced sintering temperature. The electric conductivity(σt) of (Ce0.8Nd0.2O1.9)1-x(MoO3)x at 400 ℃ was 9.58×10–4 S/cm when x=0.010, which was higher than that of undoped-NDC samples(σt=3.29×10–4 S/cm). The obtained optimal amount of the MoO3 was x=0.010 in this system.

关键词: Neodymium-doped ceria, Molybdenum oxide, Sol-gel method, Grain boundary conductivity

Abstract: The high purity (Ce0.8Nd0.2O1.9)1-x(MoO3)x(x=0, 0.005, 0.010, 0.020; Ce0.8Nd0.2O1.9=NDC) solid solutions were prepared by modified sol-gel method. The structures and electric conductivities were characterized by X-ray diffraction(XRD), field-emission scanning electron microscopy(FESEM) and electrochemical impedance spectroscopy( EIS). The XRD results show that the materials were pure phase with a cubic fluorite structure. Compared to the undoped-NDC samples, MoO3 doped-NDC showed higher sintered density(over 96%) at reduced sintering temperature. The electric conductivity(σt) of (Ce0.8Nd0.2O1.9)1-x(MoO3)x at 400 ℃ was 9.58×10–4 S/cm when x=0.010, which was higher than that of undoped-NDC samples(σt=3.29×10–4 S/cm). The obtained optimal amount of the MoO3 was x=0.010 in this system.

Key words: Neodymium-doped ceria, Molybdenum oxide, Sol-gel method, Grain boundary conductivity