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无机材料学报

无机材料学报

• 研究论文 • 上一篇    下一篇

Li2MnO3的柠檬酸盐溶胶-凝胶法合成及离子导电性

宋秀芹; 马建峰; 陈汝芬   

  1. 河北师范大学化学系, 石家庄 050016
  • 收稿日期:1999-02-18 修回日期:1999-05-04 出版日期:2000-02-20 网络出版日期:2000-02-20

Li2MnO3 Synthesis by Citrate Sol-Gel Method and Electric Property

SONG Xiu-Qin; MA Jian-Feng; CHEN Ru-Fen   

  1. Department of Chemistry; Hebei Normal University. Shijiazhuang 050016; China
  • Received:1999-02-18 Revised:1999-05-04 Published:2000-02-20 Online:2000-02-20

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摘要： 以Ｌｉ２ＣＯ３、ＭｎＣＯ３为原料，用柠檬酸盐溶胶凝胶法合成了Ｌｉ２ＭｎＯ３超微粉．对合成的材料进行了ＤＴＡ、ＴＧ、ＸＲＤ和ＴＥＭ等表征，并应用交流阻抗谱技术测定了样品的电导率．结果表明，６５０。Ｃ以上生成Ｌｉ２ＭｎＯ３纯相超微粉，粒径在５０nｍ以下．在１８～４００℃温度范围内，产物烧结体的离子导电率为１０－６～１０－３Ｓ·ｃｍ－１，其电导活化能为４４．８７ｋＪ·ｍｏｌ－１．

关键词: Li2MnO3超微粉, 柠檬酸盐溶胶－凝胶法, 离子导电性

Abstract: Li2MnO3 ultrafine powders were synthesized by the citrate sol-gel method using Li2CO3,
MnCO3 as raw materials. The powder samples were characterized by DTA, TG, XRD and TEM. Ionic conductivity of the sinter was determined by
means of A-C impedance technique. The experiment results show that Li2MnO3 pure phase is formed at over 650℃. The diameter of the powder is below
50nm. The measured magnitudes of conductivities are in the range of 10-6～10-3s·cm-1, the value of activation energy
is 44.87kJ·mol-1 from 18℃ to 400℃.

Key words: Li2MnO3, ultrafines, citrate Sol-Gel, ionic conductivity

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