高等学校化学学报 ›› 2001, Vol. 22 ›› Issue (9): 1441.

• 研究论文 •    下一篇

Ce1-xM'xCa0.2O1.8-0.4x(M=Y,La和Gd)的水热合成及离子导电性质研究

赵辉, 朱向荣, 刘泷龙, 韩东霖, 徐娓, 冯守华   

  1. 吉林大学无机合成与制备化学国家重点实验室, 长春 13002
  • 收稿日期:2000-07-10 出版日期:2001-09-24 发布日期:2001-09-24
  • 通讯作者: 冯守华(1956年出生),男,博士,教授,博士生导师,从事无机合成与材料化学研究.
  • 基金资助:

    国家自然科学基金(批准号:29731010)资助

Hydrothermal Synthesis and Ionic Conduction Properties of Ce1-x M'xCa0.2 O1.8-0.4x(M=Y, La and Gd)

ZHAO Hui, ZHU Xiang-Rong, LIU Shuang-Long, HAN Dong-Lin, XU Wei, FENG Shou-Hua   

  1. State Key Laboratory of Inoganic Synthesis and Preparative Chemistry, Jilin University, Changchun 130023, China
  • Received:2000-07-10 Online:2001-09-24 Published:2001-09-24

摘要: 采用水热法合成了系列双掺杂的萤石结构Ce1-xLnxCa0.2O1.8-0.4x固溶体,并研究了3种稀土离子对固溶体导电性的影响,发现掺杂离子半径接近Ce4+时,体系电导率增大而活化能降低.同时发现水热合成的Ce1-xLnxCa0.2O1.8-0.4x样品的平均粒度按着掺入离子Y3+,Gd3+,La3+的顺序逐渐减小,分别为32,20和15nm.这种变化是由于Y3+半径比La3+和Gd3+更接近Ce4+,因而在水热合成过程中,掺Y3+的体系更有利于晶粒的生长,得到的晶体粒度较大.

关键词: 水热合成, 双掺杂CeO2固溶体, 纳米粒子, 离子传导

Abstract: Aseries of lanthanide co doped ceria solid solution, Ce1-x M'x Ca0.2 O1.8-0.4 x (M=Y, La and Gd) has been prepared by mild hydrothermal method at 240 ℃ for less than 24h. The doping effect of lanthanide on the conduction properties was investigated. It is found that the conductivity increased from Y, Gd to La, whereas the activation energy changed in a reverse trend. It is also found that the mean particle size decreases from Y, Gd to La, they are 32 nm, 20 nm and 15 nm, respectively. All these results can be contributed to the size similarity of Y 3+ and Ce 4+.

Key words: Hydrothermal synthesis, Co doping ceria solid solution, Nano size particle, Ionic conduction.

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