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化学学报
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化学学报 ›› 1992, Vol. 50 ›› Issue (11): 1111-1116. 上一篇    下一篇

研究论文

KMgF~3中Ce^3+的发射中心及取代格位的研究

鲁尔兵;崔海宁;石春山   

  1. 中国科学院长春应用化学研究所;中国科学院稀土化学物理开放实验室
  • 发布日期:1992-11-15

The investigation on the emission centers and substituting sites in KMgF~3-Ce^3+

LU ERBING;CUI HAINING;SHI CHUNSHAN   

  • Published:1992-11-15

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本文用高温固相扩散反应方法及坩埚下降法制备了KMgF~3-Ce^3+及KMg~1-xM~xF~3-Ce^3+(M=Be^2+,Ca^2+)的粉末样品及KMgF~3-Ce^3+单晶,测定了它们的激发光谱和发射光谱,发现KMgF~3-Ce^3+中存在两种不同的发射中心,且证明了这是不同的电荷补偿途径所致,而不是Ce^3+占据了不同的阳离子格位所致.通过X射线四圆衍射仪的检测及Be^2+和Ca^2+对KMgF~3-Ce^3+中Mg^2+取代后的光谱变化,推Ce^3+占据KMgF~3中K^+的格位.

关键词: 铍化合物, 钙化合物, 铈, 四园衍射仪, 激发光谱, 晶格格位, 发射光谱, 氟化镁钾, 发射中心

With the method of high temperature solid state reaction and stockbarger, the authors synthesized a series of powder phosphors of KMgF3-Ce3+, KMg1-xMxF3-Ce3+ (M = Be2+, Ca2+) and the single crystal of KMgF3-Ce3+ were synthesized. The authors tested their excitation and emission spectra, found two emission centers in KMgF3-Ce3+ and demonstrated that they resulted from different charge compensating ways. The structural anal. on KMgF3-Ce3+ from a four-cycle diffractometer and spectral anal. on KMg1-xMxF3-Ce3+ (M = Be2+, Ca2+), indicated that Ce3+ ion only substituted K+ site in KMgF3.

Key words: BERYLLIUM COMPOUNDS, CALCIUM COMPOUDS, CERIUM, FOUR-CIRCLE DIFFRACTOMETER, EXCITATION SPECTRUM, EMISSION SPECTRA

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