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首页> 外文期刊>Journal of Crystal Growth >Processing, microstructure and optical properties of the directionally solidified Al_2O_3-EuALO_3 eutectic rods
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Processing, microstructure and optical properties of the directionally solidified Al_2O_3-EuALO_3 eutectic rods

机译：定向凝固Al_2O_3-EuALO_3共晶棒的制备，组织和光学性能

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摘要

Al_2O_3-EuAlO_3 eutectic rods were directionally solidified using the Laser-Heated Floating Zone method, also known as Laser-Heated Pedestal Growth technique, with growth rates ranging between 25 and 750 mm/h. The microstructure was found to be highly dependent on the processing parameters, the size of the phases decreasing with the growth rate down 200 nm in samples grown at 750 mm/h. At low rates, an interpenetrated network of the eutectic phases was obtained whereas at high growth rates a tendency towards a nanofibrous pattern was observed. The optical absorption and photo luminescence of the eutectics grown at 100 mm/h and 350 mm/h were measured at room temperature. The Judd-Ofelt parameters, Ω_2,Ω_4 and Ω_6, were obtained from the absorption spectra. Under a 396 nm lamp excitation, a red light emission centred in 616 nm corresponding to the Eu~(3+) ion was detected. The Eu~(3+) emission was stronger in the samples with the finer microstructure.
机译：Al_2O_3-EuAlO_3共晶棒使用激光加热浮动区方法（也称为激光加热基座生长技术）定向凝固，生长速率在25到750 mm / h之间。发现微观结构高度依赖于加工参数，在以750 mm / h的速度生长的样品中，相的大小随着生长速度下降200 nm而减小。在低速率下，获得了共晶相的互穿网络，而在高速率下，观察到了形成纳米纤维图案的趋势。在室温下测量在100mm / h和350mm / h下生长的共晶的光吸收和光致发光。从吸收光谱获得Judd-Ofelt参数Ω_2，Ω_4和Ω_6。在396 nm的灯激发下，检测到以616 Eu为中心的与Eu〜（3+）离子相对应的红色发光。微观结构较细的样品中Eu〜（3+）的发射较强。

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  • 来源
    《Journal of Crystal Growth》 |2012年第2012期|p.123-126|共4页
  • 作者

    Patricia B. Oliete; M. Cristina Mesa; Rosa I. Merino; Victor M. Orera;

  • 作者单位

    Instituto de Ciencia de Materiales de Aragon (ICMA), CSIC-Universidad de Zaragoza C/ Maria de Luna 3, 50018 Zaragoza, Spain;

    Instituto de Ciencia de Materiales de Aragon (ICMA), CSIC-Universidad de Zaragoza C/ Maria de Luna 3, 50018 Zaragoza, Spain;

    Instituto de Ciencia de Materiales de Aragon (ICMA), CSIC-Universidad de Zaragoza C/ Maria de Luna 3, 50018 Zaragoza, Spain;

    Instituto de Ciencia de Materiales de Aragon (ICMA), CSIC-Universidad de Zaragoza C/ Maria de Luna 3, 50018 Zaragoza, Spain;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    A1. Eutectics; A1. Luminescence; A2. Floating zone technique; B1. Al_2O_3-EuAlO_3; B1. Europium compounds; B2. Phosphors;

    机译：A1。共晶;A1。发光;A2。浮动区技术;B1。 Al_2O_3-EuAlO_3;B1。 compounds化合物;B2。荧光粉;

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