中华医学超声杂志

应用化学 ›› 1994, Vol. 0 ›› Issue (1): 67-71.

• 研究论文 • 上一篇    下一篇

溶胶－凝胶法合成(Mg,Ca)O－SiO2:Eu3+,Bi3+发光体及其发光行为

李彬1, 林君1, 田一光1, 白玉白2   

  1. 1. 吉林大学材料科学研究所 长春 130023;
    2. 吉林大学化学系 长春
  • 收稿日期:1992-12-09 修回日期:1993-10-18 出版日期:1994-02-10 发布日期:1994-02-10
  • 基金资助:
    中国科学院长春应用化学研究所稀土化学与物理开放实验室资助项目

Synthesis of (Mg,Ca)O-Sio2:Eu3+,Bi3+Luminophors by Sol-GeI Method and Thei Luminescence Behavior

Li Bin1, Lin Jun1, Tian Yiguang1, Bai Yubai2   

  1. 1. Institute of Materials Science, Jilin University, Changchun 130023;
    2. Department of Chemistry, Jilin University
  • Received:1992-12-09 Revised:1993-10-18 Published:1994-02-10 Online:1994-02-10

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摘要： 以Mg(NO3)2、Ca(NO3)2、Eu(NO3)3、Bi(NO3)3、LiNO3和Si(OC2H5)4为反应物,采用溶胶-凝胶法,在比较低的温度下,首次合成0.701moI MgO-0.175mol CaO-1.25moI SiO3:0.06mol Eu(3+),0.002moI Bi(3+)(加入Li+作为电荷补偿剂)发光体。得到了最佳合成条件。研究了由溶胶向凝胶转变和凝胶向发光晶体的转变过程。探讨了发光体在不同激发波长激发下的发光特性以及在激活剂、敏化剂不同掺杂量下的发光行为。讨论了在(Mg.Ca)O-SiO2基质中Bi3+对Eu3+的能量传递和敏化作用。

关键词: 掺杂铕铋铬硅酸盐, 制备, 溶胶－凝胶法, 发光体, 敏化作用

Abstract: The Iuminophors which have composition of 0. 701MgO- 0. 175CaO1. 25SiO2:0. 06Eu3+,0. 002Bi3+ and doped Li-ion as charge compensator were synthesized for the first time from Mg(NO3)2, Ca(NO3)2, Eu(NO3)3, LiNO3 and Si(OC2H5)4 via the sol-gel method at the temperature much lower than that by the traditional solid state reaction. The optimum conditions of preparation are reported. Both the transition from soI to gel and the transition process from geI to luminescent crystal were studied. The luminescence character of the luminophors excited by different wavelength light, as well as the luminescence behavior in different concentrations of the activators and sensitizers were explored. The energy transfer from Bi3+ to Eu3+ in the luminophors was also discussed.

Key words: bismuth, europium doped silicate, sol-gel method, preparation, luminophor, sensi-tization

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