Structural and Luminescent Properties of Eu2+-doped Aluminates Prepared by the Sol-gel Method

被引：0
|
作者：
Korosin, Natasa Celan [1 ]
Meden, Anton [1 ]
Bukovec, Natasa [1 ]
机构：
[1] Univ Ljubljana, Dept Inorgan Chem, Fac Chem & Chem Technol, SI-1000 Ljubljana, Slovenia
来源：
ACTA CHIMICA SLOVENICA | 2012年 / 59卷 / 04期
关键词：
Sol-gel; aluminates; europium; persistent luminescence; Rietveld refinement; solid solubility; PERSISTENT LUMINESCENCE; SRAL2O4; PHOSPHOR; AFTERGLOW;
D O I：
暂无
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Alkaline earth aluminates with the overall nominal compositions Mg0.5Sr0.5Al2O4 (MSA), Ca0.5Sr0.5Al2O4 (CSA) and Ca0.5Mg0.5Al2O4 (CMA) doped with 0.5 or 1 mol% of Eu2+ ions were obtained by a modified aqueous sol-gel method and annealed in a reductive atmosphere at 900, 1000, 1100 and 1300 degrees C. The sample compositions and their structures were studied by XRD employing the Rietveld method. Solid solubility was confirmed in CSA only, due to the similar ionic radii of Ca2+ and Sr2+. UV excited luminescence was observed in the blue region (lambda = 440 nm) in samples of CSA and CMA containing the monoclinic phase of CaAl2O4 and in the green region (lambda = 512 nm) in samples of MSA containing hexagonal or monoclinic phases of SrAl2O4.
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页码：912 / 919
页数：8
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