自组装制备铕离子掺杂氧化铝球形荧光颗粒  

Self-assembled Eu^(3+) Ion Doped Alumina Phosphor

作　　者：蒙延双[1] 朱福良[1] 王达健[2] 

机构地区：[1]兰州理工大学材料科学与工程学院,甘肃兰州730050 [2]天津理工大学材料物理研究所,天津300191

出　　处：《稀土》2008年第4期35-39,共5页Chinese Rare Earths

基　　金：国家自然科学基金项目资助(50364002);

摘　　要：利用拟薄水铝石胶粒聚集行为制备了三维梯次结构的球形Al2O3∶Eu3+荧光颗粒。AlOOH/Eu(NO3)3复合胶体喷雾过程形成雾滴,雾滴中的拟薄水铝石胶粒在范德华力和毛细管力作用下聚集,自组装形成三维梯次结构干凝胶颗粒。干凝胶颗粒经900℃灼烧获得纳米微晶组成的Al2O3∶Eu3+荧光颗粒,Eu3+以部分取代Al3+的形式进入γ-Al2O3晶格。578nm,588nm(593nm)和616nm发射峰分别来自Eu3+基态5D0到7F0,7F1和7F2的跃迁。其中616nm对应的5D0→7F2跃迁发射峰值与Eu3+掺杂α-Al2O3纳米颗粒中Eu3+发射峰相同。Three- dimensional oriented Al2O3 ： Eu^3＋ phosphor was prepared based on oriented aggregation of pseudoboehmite sol particles. Droplets of AIOOH/Eu（ NO3）3eomposite sol were formed during the spray drying process. Three - dimensional oriented dry AlOOH/Eu（NO3）sxerosol was obtained due to the self- assembly of pseudoboehmite sol particles. The vanderwaals and capillary forces between pseudoboehmite sol particles are essential for self- assembly. The Al2O3 ：Eu^3 ＋ phosphor was formed when sintered xerosol at 900℃ The unique mechanisms of Eu^3＋ partially substitution for Al^3＋ sites on ^7- Al2O3 lattice was discussed. The emission of 578nm, 588nm（593nm） and 616nm are attributed to the transition from ^5D0 to ^7Fo,^7F1 and ^7F2 in Eu^3＋ of Al2O3 ：Eu^3＋ phosphor, respectively. The emission of ^5Do→^7F2transition lles at 616 nm and is same to the emission of Eu3 ＋ in α- Al2O3 ： Eu^3 ＋ nanoparticle.

关 键 词：拟薄水铝石胶体 自组装 荧光颗粒 

分 类 号：TQ174[化学工程—陶瓷工业] O614.33[化学工程—硅酸盐工业]