期刊
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
卷 177, 期 10, 页码 712-716出版社
ELSEVIER
DOI: 10.1016/j.mseb.2011.10.010
关键词
ZrO2; Nanopowders; Combustion synthesis; PL/PLE; LFZ fibres
资金
- FCT [PTDC/CTM/66195/2006, PTDC/CTM/100756/2008, SFRH/BD/80357/2011, SFRH/BD/45774/2008, SFRH/BD/68295/2010]
- Fundação para a Ciência e a Tecnologia [SFRH/BD/68295/2010, SFRH/BD/80357/2011] Funding Source: FCT
Zirconia nanocrystals doped with europium ions were developed envisaging optical applications. The nanostructures were produced using zirconyl nitrate (ZrO(NO3)(2)center dot H2O) and europium nitrate (Eu(NO3)(3)center dot 5H(2)O) as cation precursors, and urea (C2H5NO2) as the fuel, by the combustion synthesis process. The lanthanide-doped nanostructures were characterized by X-ray diffraction, transmission electron microscopy, Raman spectroscopy and photoluminescence. X-ray diffraction revealed the presence of tetragonal and monoclinic crystalline ZrO2 phases. The latter was found to be a minority phase as identified by Raman and corroborated by the observed europium luminescence when compared to the intraionic emission in crystalline tetragonal fibres grown by the laser floating zone technique. Bright red europium luminescence is observed at room temperature when the combustion synthesized zirconia powders are excited with ultraviolet radiation. The spectroscopic properties of the europium ions in the powders are ascertained by comparing combined excitation-emission measurements with those from crystalline fibres. (C) 2011 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据