无机材料学报

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Eu2+在多铝酸钠体系中的发光

刘应亮1; 周光梅1; 冯德雄1; 杨培慧1; 石春山2   

  1. 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
  • 收稿日期:1998-12-04 修回日期:1999-01-04 出版日期:1999-12-20 网络出版日期:1999-12-20

Luminescence of Eu2+ in Sodium Polyaluminates

LIU Ying-Liang1; ZHOU Guang-Mei1; FENG De-Xiong1; YANG Pei-Hui1; SHI Chun-Shan 2   

  1. 1. Department of Chemistry of Jinan University; Guangzhou 510632; China; 2. Laboratory of Rare Earth Chemistry and Physics; Changchun Institute of Applied Chemistry Chinese Academ of Sciences, Changchun 190022, China
  • Received:1998-12-04 Revised:1999-01-04 Published:1999-12-20 Online:1999-12-20

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.

关键词: 多铝酸钠, β-Al2O3结构, Eu2+发光

Abstract: 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 to 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.

Key words: sodium polyaluminates, β-alumina structure, europium (Ⅱ) luminescence

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