Eu^(2+)在多铝酸钠体系中的发光  

Luminescence of Eu^(2+) in Sodium Polyaluminates

作　　者：刘应亮[1] 周光梅 冯德雄[1] 杨培慧[1] 石春山[2] 

机构地区：[1]暨南大学化学系,广州510632 [2]中国科学院长春应用化学研究所稀土化学与物理开放实验室,长春130022

出　　处：《无机材料学报》1999年第6期969-974,共6页Journal of Inorganic Materials

基　　金：广东省自然科学基金!970613;国务院侨办基金;稀土化学与物理开放实验室资助

摘　　要：应用高温固相法合成了Na的多铝酸盐，并研究了Eu2＋在体系中的发光性能．结果表明，Na1＋xMgAl11－xO17体系在整个组成范围内保持Na的β－Al2O3结构不变，而对于Na1．67－2xBaxAl10．33O17体系，在x＝0．30附近体系结构发生转变，x＜0．30，体系形成Na的外β－Al2O3结构的固溶体，x＞0．30，体系形成Ba的β－Al2O3结构的有序体；与体系组成和结构的变化相对应，Eu2＋的发射能量和发光强度产生相应的变化，在Na的β－Al2O3中Eu2＋存在高、低能两种发射中心；通过系列化研究，获得了新的组成的、具有β－Al2O3结构的荧光体Na0．67Ba0．50Mg0．67Al10．33O17：Eu2＋，在较低的掺杂浓度（0．05mol）下可以产生较强的发光．The sodium polyaluminates were synthesized by a high temperature solid state method and the luminescence of Eu2+ in the sodium polyaluminates was studied. The results show that the structure of the system Na1+xMgxAl11 -xO17 from x=0.1 t0 x=1 .0 belongs to Na-beta-alumina and the structure of the system Na1.67-2xBaxMg0.67Al10.33O17 changes at about x equal to 0.30, when x is smaller than 0.30 the system forms the solid solution structure of Na-beta-alumina, when x is larger than 0.30 the system becomes the ordered structure of Ba-beta-alumina, correspondingly the emission peak position and the relative emission intensity of Eu2+ change with the changes of composition and structure of the system. There exist two kinds of the luminescent centers of high and low energies of Eu2+ in the matrix of Na-beta-alumina structure. New phosphor with Ba-beta-alumina structure, Na0.67Ba0.50Mg0.67Al10.33O17:Eu2+, was obtained.

关 键 词：多铝酸钠 发光 铕 相结构 

分 类 号：TQ131.12[化学工程—无机化工] TQ133.3