高等学校化学学报

高等学校化学学报 ›› 2011, Vol. 32 ›› Issue (1): 32.

• 研究论文 • 上一篇    下一篇

Nd3+在Lu2O3纳米粉体和透明陶瓷中的局域结构研究

任玉英1,周鼎1,郭婧1,施鹰1,谢建军1,谢治2,贺博2   

  1. 1. 中央民族大学生命与环境科学学院化学系, 北京 100081; 
    2. 吉林大学无机合成与制备化学国家重点实验室, 长春 130012
  • 收稿日期:2010-03-31 修回日期:2010-09-13 出版日期:2011-01-10 发布日期:2010-12-11
  • 通讯作者: 施鹰 E-mail:yshi@shu.edu.cn
  • 基金资助:

    国家“九七三”计划项目(批准号: 2006CB806100)\, 中央民族大学高等学校111学科创新引智计划项目(批准号:  B08044)和中央民族大学985工程项目(批准号:  CUN985\|03\|03)资助.

Synthesis, Structure and Gas Adsorption Property of a Novel 2D Layer Nickel Organo\|diphosphonate Compound

REN Yu-Ying1, ZHOU Ding1,GUO Jing1,SHI Ying1,XIE Jian-Jun1,XIE Zhi2,HE Bo2   

  1. 1. College of Life and Environmental Sciences, Minzu University of China, Beijing 100081, China;
    2. State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, Jilin University, Changchun 130012, China
  • Received:2010-03-31 Revised:2010-09-13 Online:2011-01-10 Published:2010-12-11
  • Contact: SHI Ying E-mail:yshi@shu.edu.cn
  • Supported by:

    国家“九七三”计划项目(批准号: 2006CB806100)\, 中央民族大学高等学校111学科创新引智计划项目(批准号:  B08044)和中央民族大学985工程项目(批准号:  CUN985\|03\|03)资助.

PDF (PC)

摘要： 利用扩展X射线吸收精细结构光谱(EXAFS)研究了不同掺杂浓度Nd3+:Lu2O3纳米粉体和透明陶瓷中Nd3+的局域结构.结果表明在不同条件下Nd3+通过固溶取代Lu3+的方式进入Lu2O3基质晶格.掺杂Nd3+原子的第一配位键长约2.25A,小于Nd2O3纳米粉中Nd-O第一近邻键长2.51A而大于Lu2O3中Lu-O第一近邻键长2.21A.在Lu2O3晶格中掺杂Nd离子的局域环境与基质晶体场、掺杂浓度以及材料聚集状态密切相关, 随着Nd掺杂量的从0.5at.%提高至3at.%,纳米粉体无序度由0.052升高到0.090,Nd3+:Lu2O3纳米粉体中Nd3+的第一近邻Nd-O键长、配位数和无序度因子均大于透明陶瓷。

关键词: EXAFS, 局域结构, Nd3+:Lu2O3, 纳米粉体, 透明陶瓷

Abstract: Local structure of Nd doped ions in Lu2O3 nanopowders and transparent ceramic samples were investigated through X-ray absorption fine structure (EXAFS). EXAFS spectroscopy of Nd L3 edge at about 6215 eV demonstrated that doped Nd atoms has entered Lu2O3 host lattice by substitution solid solution. Fitting results of EXAFS data presented detailed information about species of Nd near-neighborhood coordination atoms，inter-atom distance，coordination number and disorder parameter. Nd ions in Lu2O3 host are mainly six coordinated with the first shell nearest Nd-O distance of 2.25A, which was less than Nd-O first shell distance 2.51A of Nd2O3. The disorder parameter raised from 0.052 to 0.090 with increasing Nd3+ doping concentration from 0.5at.% to 3at.%. Nd:Lu2O3 nanocrystalline powders exhibited a lager first shell nearest Nd-O distance，coordination number and disorder parameters than those of transparent ceramics.

Key words: EXAFS, Local structure, Nd3+:Lu2O3, Nanopowder, Transparent ceramic

TrendMD: