中华医学超声杂志

应用化学 ›› 1987, Vol. 0 ›› Issue (6): 14-17.

• 研究论文 • 上一篇    下一篇

钙钛矿型稀土碱土铌酸盐的合成、结构和光谱性质

张静筠, 路锋, 苏锵   

  1. 中国科学院长春应用化学研究所
  • 收稿日期:1986-09-17 修回日期:1987-03-30 出版日期:1987-12-10 发布日期:1987-12-10
  • 基金资助:
    国家自然科学基金

PREPARTION,CRYSTAL STRUCTURE AND SPECTRA OF RARE EARTH-ALKALINE EARTH NIOBATE OF PEROVSKITE TYPE

Zhang Jingjun, Lu Feng, Su Qiang   

  1. Changchun Institute of Applied Chemistry, Academia Sinica
  • Received:1986-09-17 Revised:1987-03-30 Published:1987-12-10 Online:1987-12-10

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摘要： 本文着重研究稀土碱土铌酸盐体系M2Y0.94RE0.06NbO6(M=Ca、Sr、Ba;RE=Eu.Sm、Dy)的合成、结构与光谱性质及其变化规律。Ca2Y0.94RE0.06NbO6为畸变的钙钛矿型结构,属单斜晶系,空间群C2或Cs;Sr(Ba)2Y0.94RE0.06NbO6为立方有序的钙钛矿型结构,空间群Oh。随着Ba-Sr-Ca的次序Eu3+的红发射增强,Sm3+的橙发射增强,Dy3+的黄发射增强。

Abstract: In this paper, the preparation, crystal structure and spectral properties of M2Y0.94-RE0.06NbO6 (M=Ca, Sr, Ba; RE=Eu, Sm, Dy) have been studied. The X-ray powder diffraction data and Eu3+-emission spectra showed that Ca2Y0.94Eu0.06NbO6 with distorted perovskite structue belongs to monoclinic system, the site symmetry may be C2 or Cs; Sr2Y0.94-Eu0.06NbO6 and Ba2Y0.94Eu0.06 NbO6 with ordered perovskite structure belong to cubic system the site symmetry may be Oh. It is found that the spectral properties of Eu3+, Sm3+ and Dy3+ intensify regularly in order of Ba-Sr-Ca.

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