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Eu^(2+)在多铝酸钠体系中的发光 被引量:1

Luminescence of Eu^(2+) in Sodium Polyaluminates
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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 相结构 sodium polyaluminates, β-alumina structure, europium (Ⅱ) luminescence
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  • 1温兆银 石春山 等.-[J].中国稀土学报,1988,6:25-29. 被引量:1
  • 2温兆银,中国稀土学报,1988年,6卷,25页 被引量:1

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