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2009 , Vol. 24 >Issue 4: 773 - 777

DOI: https://doi.org/10.3724/SP.J.1077.2009.00773

研究论文

Gd3+为敏化剂的掺Tb3+硅酸盐闪烁玻璃

  • 王 胜 ,
  • 钱 奇 ,
  • 张勤远 ,
  • 杨中民 ,
  • 姜中宏
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  • 特种功能材料教育部重点实验室, 华南理工大学 光通信材料研究所, 广州 510640

收稿日期: 2008-11-19

  修回日期: 2008-12-24

  网络出版日期: 2009-07-20

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Gd3+-sensitized Tb3+-doped Scintillating Silicate Glasses

  • WANG Sheng ,
  • QIAN Qi ,
  • ZHANG Qin-Yuan ,
  • YANG Zhong-Min ,
  • JIANG Zhong-Hong
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  • MOE Key Laboratory of Specially Functional Materials, Institute of Optical Communication Materials, South of China University of Technology, Guangzhou 510640, China

Received date: 2008-11-19

  Revised date: 2008-12-24

  Online published: 2009-07-20

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摘要

实验制备了以Tb3+为激活剂、Gd3+为敏化剂的硅酸盐闪烁玻璃, 研究了Tb2O3和Gd2O3含量对玻璃密度和玻璃折射率, 以及对玻璃在紫外光激发和X射线激发条件下的光学光谱特性的影响. 通过研究Tb3+/Gd3+共掺闪烁玻璃的激发与发光特性、荧光寿命, 结合稀土离子能级结构, 分析了Gd3+→Tb3+离子之间的能量转移与传递机制. 结果表明：在紫外激发条件下, 大量引入Tb2O3和Gd2O3可提高Gd3+→Tb3+离子之间的能量传递效率, 有利于Tb3+离子的绿色发光; 但是在X射线激发条件下大量引入Tb3+离子, 由于缺陷数增加而弱化Tb3+离子荧光.

关键词： Tb3+离子; Gd3+离子; 闪烁玻璃; 能量传递

本文引用格式

王 胜 , 钱 奇 , 张勤远 , 杨中民 , 姜中宏 . Gd3+为敏化剂的掺Tb3+硅酸盐闪烁玻璃[J]. 无机材料学报, 2009 , 24(4) : 773 -777 . DOI: 10.3724/SP.J.1077.2009.00773

Abstract

Gd3+-sensitized Tb3+-doped scintillating silicate glasses with Gd2O3 and Tb2O3 concentrations up to 45wt% were prepared. Effects of different Gd2O3 and Tb2O3 concentrations on the density, refractive index and luminescence properties under UV and X-ray excitations were investigated and the energy transfer mechanisms between Gd3+ and Tb3+ analyzed and discussed. The results show that, with the increasing concentrations of Tb3+ and Gd3+, a monotonic increase in the energy transfer efficiencies from Gd3+∶6P7/2 to Tb3+∶5H7 is observed followed by enhanced emissions centered at 620, 583, 541 and 496nm under 273nm UV excitation. However, with X-ray excitation, the incorporation of a large amount of Tb3+ weakens the luminescence emission due to the increase of point defects in glass.

Key words： terbium ions; gadolinium ions; scintillating glasses; energy transfer

参考文献

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