Nd(III) and Yb(III) ions incorporated in Y4Al2O9 obtained by sol‐gel method: synthesis, structure, crystals and luminescence
Nd(III) and Yb(III) ions incorporated in Y4Al2O9 obtained by sol‐gel method: synthesis, structure, crystals and luminescence
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DOI：
10.1002/crat.200800464
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发表时间：
2009-02
影响因子：
1.5
通讯作者：
L. Lipińska;A. Rzepka;R. Ryba‐Romanowski;D. Klimm;S. Ganschow;R. Diduszko
中科院分区：
文献类型：
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作者：
L. Lipińska;A. Rzepka;R. Ryba‐Romanowski;D. Klimm;S. Ganschow;R. Diduszko
采用改进的Sol-Gel法制备了纯Y4Al2O9(YAm)和掺杂NdYb以及NdYb共掺杂的Y4Al2O9(YAm)纳米晶粉末。用X射线衍射法、扫描电子显微镜和高分辨扫描电子显微镜、发光光谱和差热分析(DTA)对其进行了表征。我们得到了平均尺寸为70 nm的晶体结构的单相粉末，表现出了有趣的发光性能。发现了NdYb之间有效的非辐射能量转移。差热分析证实了在1400℃左右发生了相变，用微下拉技术生长了YAM：YB，YAM：YB，ND晶体。它们在冷却过程中由于相变而破裂。在实验不确定度范围内，YAm：Nd，Yb晶体的发光性质与相应的纳米粉末的性质一致。(2019Wiley-VCH Verlag GmbH&Co.KGaA，Weinheim)
The nanocrystalline powders of Y4Al2O9 (YAM) pure and doped by Nd, Yb and codoped by Nd and Yb were obtained via modified sol‐gel method. These powders were characterized by X‐ray diffraction method, scanning electron microscopy and high resolution scanning electron microscopy, luminescence spectroscopy and differential thermal analysis (DTA). We obtained single phase powders of crystalline structure with average size 70 nm exhibiting interesting luminescent properties. Efficient non‐radiative energy transfer between Nd and Yb was found. DTA confirmed the phase transition at about 1400 °C. From these nanocrystalline powders, the crystals YAM:Yb, YAM:Yb,Nd were grown by micro‐pulling down technique. They were cracking during cooling owing to the phase transition. Luminescent properties of YAM:Nd,Yb crystals were identical with properties of corresponding nanopowders within experimental incertitude. (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)