Fabrication and spectroscopic properties of nanocrystalline La2Hf2O7:Pr

被引：21
|
作者：
Trojan-Piegza, J. [1 ]
Zych, E. [1 ]
Kosinska, M. [1 ]
机构：
[1] Univ Wroclaw, Fac Chem, PL-50383 Wroclaw, Poland
来源：
RADIATION MEASUREMENTS | 2010年 / 45卷 / 3-6期
关键词：
X-ray phosphor; Pr3+; Hafnates; LUMINESCENCE; EMISSION; PR3+; HF;
D O I：
10.1016/j.radmeas.2010.02.017
中图分类号：
TL [原子能技术]; O571 [原子核物理学];
学科分类号：
0827 ; 082701 ;
摘要：
La2Hf2O7 nanopowders doped with different Pr concentrations (0.05-10 mol.%) were synthesized by the Pechini method. XRD measurements confirmed the single crystalline phase formed already at 800 degrees C and the structure was cubic pyrochlore. Luminescence excitation and emission as well as radioluminescence spectra were recorded for the materials. Both optical and X-ray excitation of La2Hf2O7:Pr produced a red emission resulting from the 4f-4f transitions of Pr3+ ions. Luminescence of materials synthesized at low temperatures was characterized by broadband glass-type emissions, while heat treatment at 1400 degrees C led to spectra showing the typical for crystalline hosts narrow and intense 4f-4f transitions of Pr3+. (C) 2010 Elsevier Ltd. All rights reserved.
引用
收藏
页码：432 / 434
页数：3
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