无机材料学报 ›› 2014, Vol. 29 ›› Issue (2): 220-224.DOI: 10.3724/SP.J.1077.2013.13428 CSTR: 32189.14.SP.J.1077.2013.13428

• 研究快报 • 上一篇    

Sb掺杂Li7La3Zr2O12陶瓷的显微结构及离子导电性能研究

曹珍珠1, 任 伟1, 刘进荣1, 李国荣2, 高艳芳1, 房明浩3, 何伟艳1   

  1. (1. 内蒙古工业大学 化工学院, 呼和浩特010051; 2. 中国科学院 上海硅酸盐研究所, 上海200050; 中国地质大学 材料科学与工程学院, 北京100083)
  • 收稿日期:2013-08-22 修回日期:2013-10-29 出版日期:2014-02-20 网络出版日期:2014-01-17
  • 作者简介:曹珍珠. E-mail: czz03@163.com
  • 基金资助:

    National Natural Science Foundation of China (51102130); Program for Key Laboratory of Inorganic Function Material and Device, Chinese Academy of Sciences (KLIFMD-2011-01)

Microstructure and Ionic Conductivity of Sb-doped Li7La3Zr2O12 Ceramics

CAO Zhen-Zhu1, REN Wei1, LIU Jin-Rong1, LI Guo-Rong2, GAO Yan-Fang1, FANG Ming-Hao3, HE Wei-Yan1   

  1. (1. Chemical Engineering College of Inner Mongolia University of Technology, Hohhot 010051, China; 2. Key Laboratory of Inorganic Function Material and Device, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China; 3. School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China)
  • Received:2013-08-22 Revised:2013-10-29 Published:2014-02-20 Online:2014-01-17
  • About author:CAO Zhen-Zhu(1977–), male, associate professor. E-mail: czz03@163.com
  • Supported by:

    National Natural Science Foundation of China (51102130); Program for Key Laboratory of Inorganic Function Material and Device, Chinese Academy of Sciences (KLIFMD-2011-01)

摘要: 采用传统固相反应法制备了锑掺杂的锆镧酸锂固体电解质陶瓷。对陶瓷的晶体结构、显微结构及元素分布、离子电导率进行了研究。结果表明: 少量锑掺杂可明显提高锆镧酸锂固体电解质陶瓷的离子电导率。1160℃烧结的锑掺杂固体电解质中, 晶粒表面形成无定型的薄膜。此薄膜抑制了晶粒生长, 消除了晶界上的气孔, 提高了陶瓷致密度, 提高了陶瓷的离子导电率。1160℃烧结得到的Li6.925La3Zr1.925Sb0.075O12陶瓷离子电导率高达3.40×10-4 S/cm。

关键词: 固体电解质, 离子电导率, 显微结构, 掺杂

Abstract: The garnet-related oxides Li7-xLa3Zr2-xSbxO12 (x = 0, 0.075) were prepared by solid-state reaction method. Crystal structure, microstructure, conductivity, and element distribution were characterized for the pure and Sb-doped Li7La3Zr2O12. Ionic conductivity of the Li7La3Zr2O12 is enhanced by Sb doping. An amorphous Li-La-Zr-Al-O thin film which is formed on the grain boundary of Sb-doped samples not only suppresses the abnormal grain growth but also eliminates the pores on the grain boundary. The ionic conductivity of Sb doped Li7-xLa3Zr2-xSbxO12 ceramic with x = 0.075 sintered at 1160℃ reaches about 3.40×10-4 S/cm.

Key words: solid electrolyte, ionic conductivity, microstructure, doping

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