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化学学报
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化学学报 ›› 2009, Vol. 67 ›› Issue (11): 1201-1204. 上一篇    下一篇

研究论文

单掺杂与共掺杂离子对Sr2Mg(BO3)2磷光体热释发光的影响

刘丽艳a,b 李成宇*,a 郝景权a 唐 强c
张纯祥c 张彦立d 苏 锵*,a

  

  1. (a中国科学院长春应用化学研究所稀土资源利用国家重点实验室 长春 130022)
    (b沈阳师范大学化学与生命科学学院 沈阳 110034)
    (c中山大学物理系 广州 510275)
    (d中国计量科学院电力辐射与医学处 北京 130000)

  • 投稿日期:2008-03-27 修回日期:2009-12-01 发布日期:2009-06-14
  • 通讯作者: 李成宇

Effect of Single- and co-Dopant on TL of Sr2Mg(BO3)2 Phosphor

Liu, Liyan a,b Li, Chengyu *,a Hao, Jingquan a Tang, Qiang c
Zhang, Chunxiang c Zhang, Yanli d Su, Qiang* ,a
  

  1. (a State Key Laboratory of Application of Rare Earth Resources, Changchun Institute of Applied Chemistry,
    Chinese Academy of Sciences, Changchun 130022)
    (b College of Chemistry and Life Sciences of Shenyang Normal University, Shenyang 110034)
    (c Department of Physics, Sun Yat-sen University, Guangzhou 510275)
    (d Ionizing Radiation Division, National Institute of Metrology, Beijing 130000)

  • Received:2008-03-27 Revised:2009-12-01 Published:2009-06-14
  • Contact: Li, Chengyu

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被引次数

7

通过高温固相法合成了Sr2Mg(BO3)2磷光体, 并研究了Li＋, Bi3＋, Gd3＋, Ti4＋共掺杂对Sr2Mg(BO3)2∶Dy磷光体热释发光的影响. 研究发现: Li＋的共掺杂使Sr2Mg(BO3)2∶Dy磷光体的热释光主峰强度增加, 而 Bi3＋, Gd3＋或Ti4＋的掺入使样品的热释光强度降低. 在Li＋, Bi3＋, Gd3＋或Ti4＋共掺杂的Sr2Mg(BO3)2∶Dy磷光体高温热释光发射谱中, 我们观察到了480, 579, 662和755 nm的发射峰, 为特征Dy3＋离子的4F9/2→6H15/2, 4F9/2→6H13/2, 4F9/2→6H11/2和4F9/2→6H9/2跃迁, 与Sr2Mg(BO3)2∶Dy磷光体的发射一致. 利用峰形法, 我们评估了Sr2Mg(BO3)2∶ , ( )热释光磷光体234 ℃发光峰的动力学参数, 陷阱深度E＝1.1 eV, 频率因子s＝6.3×109 s－1, 遵循二级动力学.

关键词: 热释光, Sr2Mg(BO3)2, 镝, 伽玛射线

Sr2Mg(BO3)2 thermoluminescence (TL) phosphor was synthesized by a high temperature solid state reaction and the effect of Li＋, Bi3＋, Gd3＋or Ti4＋ as a codopant on TL of Sr2Mg(BO3)2∶Dy was investigated. The results show that Li＋ as a codopant improves the emission intensity of high temperature TL peak of Sr2Mg(BO3)2∶Dy phosphor whereas the addition of Bi3＋, Gd3＋ or Ti4＋ leads to the decrease of TL intensity. The TL emission bands of Sr2Mg(BO3)2∶Dy phosphors with Li＋, Bi3＋, Gd3＋ or Ti4＋ as a codopant are situated at 480, 579, 662 and 755 nm, which were attributed to the characteristic 4F9/2→6H15/2, 4F9/2→6H13/2, 4F9/2→6H11/2 and 4F9/2→6H9/2 transitions of Dy3＋ ion, consistent with the emission of Sr2Mg(BO3)2∶Dy phosphors. The kinetics parameters of 234 ℃ TL peak of Sr2Mg(BO3)2∶ phosphor with the values of trap depth E＝1.1 eV, frequency factor s＝6.3×109 s－1 were estimated by a peak shape method, which obey the second order kinetics.

Key words: thermoluminescence, Sr2Mg(BO3)2, dysprosium, gamma ray