摘要
采用溶胶-凝胶法制备了稀土Nd^(3+)掺杂的BaTiO_2纳米粉体材料.采用热重法(TG)、X射线衍射(XRD)、傅立叶红外转换光谱(FTIR)等方法对样品进行分析和表征.采用荧光光谱研究材料的光致发光特性.研究不同浓度Nd^(3+)掺杂对于BaTiO_2纳米粉体材料的晶体结构、晶粒尺寸以及频率上转换发光特性的影响规律,并对其发光机制展开了讨论.研究发现,Nd^(3+)掺杂抑制了BaTiO_2晶粒的生长.随着Nd^(3+)替代位置的变化,BaTiO_2的晶格常数出现了相应的改变.此外,该材料体系具有较高的淬灭浓度,达到了10%.
BaTiO_3 nano-powders with Nd^（3＋） dopant concentrations like 0%,1%,3%,5%,7%,and 10%have been prepared by modified sol-gel method and characterized with thermo-gravimetric（TG） analysis, X-ray diffraction（XRD）,and Fourier-Transform Infrared（FTIR） spectrum,respectively.Photolumi-nescence property of the Nd^（3＋） -doped BaTiO_3 nano-powders is also studied with fluorescence spectrum.Furthermore, influences of the Nd^（3＋） ion concentrations on the microstructure,crystallite size,and up-conversion luminescence mechanisms of the nano-powders are investigated.It is found that the growth of the BaTiO_3 crystalline is inhibited by the doping Nd^（3＋）,and the location change of Nd^（3＋） substitution affects the lattice constant of the BaTiO_3 crystalline.In addition,the material system has a higher quenching concentration reaching 10%.
出处
《湘潭大学自然科学学报》
CAS
CSCD
北大核心
2010年第4期28-31,39,共5页
Natural Science Journal of Xiangtan University
基金
中南大学研究创新基金项目(2009ssxt136)
作者简介
杨兵初（1957-）．男，湖南常德人，教授，博士生导师．E-mail：xiongjiankyxx@163．com
