应用化学 ›› 1998, Vol. 0 ›› Issue (3): 22-25.

• 研究论文 • 上一篇    下一篇

BaCe1-xRExO3-0.5x的溶胶-凝胶法合成及离子导电性

何志奇, 蒋凯, 孟建, 任玉芳, 苏锵   

  1. 中国科学院长春应用化学研究所稀土化学与物理开放实验室 长春130022
  • 收稿日期:1997-11-11 修回日期:1998-03-12 出版日期:1998-06-10 发布日期:1998-06-10
  • 基金资助:
    国家攀登计划;国家自然科学基金

Synthesis and Ionic Conductivity of BaCe1-xRExO3-0.5x Prepared by Sol-gel Method

He Zhiqi, Jiang Kai, Meng Jian, Ren Yufang, Su Qiang   

  1. Open Laboratory of Rare Earth Chemistry and Physics, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022
  • Received:1997-11-11 Revised:1998-03-12 Published:1998-06-10 Online:1998-06-10

摘要: 用溶胶-凝胶法合成了系列钙钛矿结构的BaCe1-xRExO3-0.5x(RE=La,Nd,Sm,Eu,Gd,Dy,Ho,Er和Y)复合氧化物,通过XRD和热分析对样品结构及生成过程进行了研究。测定了不同温度下样品的交流阻抗谱,讨论了稀土离子掺杂对BaCeO3电性质的影响。溶胶-凝胶法比固相反应法合成温度降低了600~800℃,稀土掺杂使BaCeO3离子导电率提高了10~40倍。

关键词: BaCeO3, 稀土复合氧化物, 溶胶-凝胶法, 离子导电率, 交流阻抗谱

Abstract: A series of perovskite complex oxides BaCe1-xRExO3-0.5x(RE=La,Nd,Sm,Eu,Gd,Dy,Ho,Er and Y) were synthesized by sol gel method. The structure and synthetic process were studied by XRD, TGA and DTA. The ionic conductivities were measured at diffe rent temperature by ac impedance method. The effects of RE3+ dopant on the conductivities of BaCeO3 were discussed. The synthetic temperature by sol gel method was 600~800 ℃ lower than that by traditional ceramic method. The ionic conductivities of BaCeO3 doped with RE3+ were 10~40 times as much as that of pure BaCeO3.

Key words: BaCeO3, rare earth complex oxide, sol-gel method, ionic conductivity, ac impedance