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.
出处
《无机材料学报》
SCIE
EI
CAS
CSCD
北大核心
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
关键词
多铝酸钠
发光
铕
相结构
sodium polyaluminates, β-alumina structure, europium (Ⅱ) luminescence