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制备条件对尖晶石型LiMn2O4的相行为及结构的影响
引用本文:宫杰,王春忠,刘伟,杨景海,魏英进,宗占国,陈岗. 制备条件对尖晶石型LiMn2O4的相行为及结构的影响[J]. 高等学校化学学报, 2002, 23(8): 1462-1465
作者姓名:宫杰  王春忠  刘伟  杨景海  魏英进  宗占国  陈岗
作者单位: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
基金项目:高等学校博士学科点专项科研项目,20010183031,
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  
文章编号:0251-0790(2002)08-1462-04
收稿时间:2001-08-02

Effect of Preparation Condition on Phase Behavior and Structure of Spinel LiMn2O4
GONG Jie ,,WANG Chun Zhong ,LIU Wei ,YANG Jing Hai , WEI Ying Jin ,ZONG Zhan Guo ,CHEN Gang. Effect of Preparation Condition on Phase Behavior and Structure of Spinel LiMn2O4[J]. Chemical Research In Chinese Universities, 2002, 23(8): 1462-1465
Authors:GONG Jie     WANG Chun Zhong   LIU Wei   YANG Jing Hai    WEI Ying Jin   ZONG Zhan Guo   CHEN Gang
Affiliation: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
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.
Keywords:Spinel type structure  Lattice patameters  Binding energy  
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