均分散球形Y_2O_3:Eu^(3+)纳米晶的制备  

Preparation of Monodispersed Spherical Y_2O_3:Eu^(3+) Nanocrystalline

作　　者：周建国 李振泉[1] 赵凤英[1] 夏树屏[2] 高世扬 

机构地区：[1]河南师范大学 [2]中国科学院盐湖研究所西安二部,陕西西安710043

出　　处：《稀有金属材料与工程》2005年第6期932-935,共4页Rare Metal Materials and Engineering

基　　金：河南省自然科学基金(0111030200)河南省教育厅基金(1999150029;2000150038)河南省高校青年骨干教师基金资助

摘　　要：采用凝胶网格共沉淀法,以明胶为反应基质制备了单分散球形纳米Y2O3:Eu3+荧光粉,考察了制备条件对产物粒径的影响。利用X射线衍射(XRD)、透射电子显微镜(TEM)和荧光光谱等手段对样品进行了表征。结果表明:该法制得产物为球形,一次晶粒粒径在13nm-25nm之间,且粒度分布均匀,与微米晶相比,该纳米晶的激发光谱发生明显红移。Monodispersed spherical Y2O3:Eu3+ nanocrystallines were successfully prepared by a novel gel-network coprecipitition process. The effect of reaction conditions on the resulting particles was investigated. XRD, TEM and fluoresce spectra were used to characterize the samples. The results show that the samples were spherical with a particle size of 13 nm similar to 25 nm. Compared with micronscale Y2O3:Eu3+ a clear red shift occurs in the excitation spectrum of Y2O3:Eu3+ nanocrystalline prepared by the present work.

关 键 词：凝胶网格共沉淀法 纳米 Y2O3:Eu^2+ 

分 类 号：TB383[一般工业技术—材料科学与工程]