作　　者： ; ;

机构地区： 暨南大学生命科学技术学院化学系

出　　处： 《无机材料学报》 1999年第6期969-974,共6页

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

领　　域： [化学工程] [化学工程]