高等学校化学学报

高等学校化学学报 ›› 2002, Vol. 23 ›› Issue (8): 1462.

• 研究论文 • 上一篇    下一篇

制备条件对尖晶石型LiMn2O4的相行为及结构的影响

宫杰1,2, 王春忠1, 刘伟1, 杨景海1,2, 魏英进1, 宗占国2, 陈岗1   

  1. 1. 吉林大学汽车材料教育部重点实验室, 材料科学与工程学院, 长春 130023;
    2. 吉林师范大学凝聚态物理研究所, 四平 136000
  • 收稿日期:2001-08-02 出版日期:2002-08-24 发布日期:2002-08-24
  • 作者简介:陈岗(1958年生),男,博士,教授,博士生导师,从事材料物理与化学研究.
  • 基金资助:

    教育部博士学科点基金(批准号:20010183031)资助

Effect of Preparation Condition on Phase Behavior and Structure of Spinel LiMn2O4

GONG Jie1,2, WANG Chun-Zhong1, LIU Wei1, YANG Jing-Hai1,2, WEI Ying-Jin1, ZONG Zhan-Guo2, CHEN Gang1   

  1. 1. Key Laboratory of Automobile Materials, Ministry of Education, College of Materials Science and Engineering, Jilin University, Changchun 130023, China;
    2. Institute of Condensed State Physics, Jilin Normal University, Siping 136000, China
  • Received:2001-08-02 Online:2002-08-24 Published:2002-08-24

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摘要： 将LiNO3和Mn3O4按不同物质的量比[x=n(Li):n(Mn)=0.50,0.52,0.54,0.58,0.62,0.70]混合,在空气气氛下,于700℃烧结得样品.实验发现,在0.52≤x≤0.70的范围内,样品均呈现出单相的尖晶石型LiMn2O4结构,晶胞参数随着x的增加而减小.将x=0.50的LiNO3和Mn3O4混合物在不同温度(300,400,500,600和700℃)下进行烧结处理.结果表明,于300℃合成得到的样品为尖晶石型LiMn2O4,随着烧结温度的升高,晶胞参数增大;当温度大于600℃时出现杂相,可以通过加入过量的Li(即x≥0.52)来加以抑制.实验结果表明,通过控制烧结温度和Li加入量可以得到理想的尖晶石型LiMn2O4单相材料.

关键词: 尖晶石型结构, 晶胞参数, 结合能

Abstract: Mixtures of LiNO3 and Mn2O3, with different n(Li)/n(Mn) ratios[x=n(Li): n(Mn)=0.50, 0.52, 0.54, 0.58, 0.62 and 070], were sintered at 700 ℃. It is found that materials with x ratio between0 52 and 0.70 exhibit a single phase spinel structure. Lattice constant decreases with the increase of x value. The mixture of LiNO3 and Mn2O3, with x =0.50, was sintered at different temperatures(300, 400, 500, 600 and 700 ℃). The results show that the materials sintered at temperature lower than 600℃, additional phase can be removed via over adding the lithium to extend x value larger than 0.52. Lattice constant increases with increasing the sintering temperature.

Key words: Spinel type structure, Lattice patameters, Binding energy

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