碳酸氢铵共沉淀法制备(Y,Gd)2O3：Eu^3＋纳米材料及光谱特性  

Preparation and Spectrum Characteristics of(Y,Gd)_2O_3:Eu^(3+) Nano-particles by Ammonium Bicarbonate Co-precipitation Method

作　　者：郭易芬[1,2] 马伟民[1] 闻雷[3] 沈世妃[1] 王华栋[1] 尹凯[1] 

机构地区：[1]沈阳化工学院材料科学与工程学院,沈阳110142 [2]沈阳大学机械工程学院,沈阳110044 [3]中国科学院金属研究所沈阳材料科学国家(联合)实验室,沈阳110016

出　　处：《人工晶体学报》2009年第3期746-750,共5页Journal of Synthetic Crystals

基　　金：辽宁省自然科学基金项目(No.20062001);辽宁省科技攻关计划项目(No.2005222009)

摘　　要：以碳酸氢铵作沉淀剂采用共沉淀法制备了(Y,Gd)2O3∶Eu3+纳米粉体。用FT-IR、DTA/TG、XRD和SEM对样品进行了表征,并用荧光光度计分析了样品的发射光谱。结果表明:碳酸氢铵为沉淀剂,先驱沉淀物经150℃干燥,800℃煅烧保温2 h时,合成了近似球形、粒径均匀、约为15~20 nm、分散性好的(Y,Gd)2O3∶Eu3+纳米粒子。随着掺入Eu3+浓度的增加,发射峰强升高;当掺入5 mol%的Eu3+时,峰强最大;当Eu3+的含量高于5 mol%时出现了浓度猝灭,峰强反而降低。（Y, Gd）2O3：Eu^3＋ nanopowders were prepared by co-precipitation method using ammonium bicarbonate as precipitating agent. FT-IR, XRD, TEM, SEM, DTA/TG and SEM were used to charaeterize the samples. The emission spectrums of the samples were analyzed by the fluor-photometer. The results show that the powders are approximately spherical particles with even particle size of about 15-20 nm and good dispersivity under calcining at 800 ℃ for 2 h and drying at 150 ℃. With the increasing of Eu^3＋ concentration, the peak intensity enhanced. When the concentration of Eu^3＋ is 5 mol%, the emission peak of ^5D0→^7F2 transition has the strongest peak intensity. However, the peak intensity decreased when the doping concentration of Eu^3＋ is higher than 5 tool%, which induced by the concentration quenching.

关 键 词：共沉淀法 (Y Gd)2O3:Eu3+纳米粒子 光谱特性 浓度猝灭 

分 类 号：O614.33[理学—无机化学] TQ422[理学—化学]