物理化学学报 >> 2006, Vol. 22 >> Issue (05): 616-621.doi: 10.1016/S1872-1508(06)60022-3

研究论文 上一篇    下一篇

ErCl3-CdCl2-HCl-H2O的相平衡(25 ℃)及其固相化合物*

卓立宏;乔占平;郭应臣;王惠   

  1. 南阳师范学院化学系,河南 南阳 473061; 西北大学化学系, 西安 710069
  • 收稿日期:2005-11-25 修回日期:2006-02-06 发布日期:2006-04-28
  • 通讯作者: 乔占平 E-mail:nyqiaozp@eyou.com

Phase Equilibrium of the ErCl3-CdCl2- HCl-H2O System at 25 ℃ and Characterization of New Compounds

ZHUO Li-Hong;QIAO Zhan-Ping;GUO Ying-Chen;WANG Hui   

  1. Chemistry Department, Nanyang Normal University, Nanyang 473061, P. R. China;Department of Chemistry,Northwest University, Xi'an 710069, P. R. China
  • Received:2005-11-25 Revised:2006-02-06 Published:2006-04-28
  • Contact: QIAO, Zhan-Ping E-mail:nyqiaozp@eyou.com

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摘要： 测定了四元体系ErCl3-CdCl2-HCl-H2O(298.15K)的相平衡溶度数据, 绘制了相应的溶度图. 该四元体系是由4 个固相区CdCl2·H2O(原始盐)、9CdCl2·2ErCl3·29H2O、CdCl2·7ErCl3·42H2O、ErCl3·6H2O(原始盐)组成的复杂体系. 对两个新物相化合物9CdCl2·2ErCl3·29H2O 和CdCl2·7ErCl3·42H2O 进行了XRD、TG-DTG 和荧光光谱研究.结果表明, 两个新物相化合物均具有荧光和上转换发光性能; 化合物9CdCl2·2ErCl3·29H2O通过3 步失去其结晶水, CdCl2·7ErCl3·42H2O 则1 步失去其结晶水.

关键词: 四元体系, 相平衡, 氯化镉, 氯化铒, 上转换发光

Abstract: The equilibriumsolubility of the quaternary systemErCl3-CdCl2-HCl-H2O was determined at 298K and the corresponding equilibrium diagram was constructed. The quaternary system is complicated with four equilibrium solid phases CdCl2·H2O, 9CdCl2·2ErCl3·29H2O , CdCl2·7ErCl3·42H2O, and ErCl3·6H2O. The two newcompounds, 9CdCl2· 2ErCl3·29H2O and CdCl2·7ErCl3·42H2O, have not yet been reported in literatures, and have been characterized by XRD, TG-DTG, and fluorescence spectra. Results showed that the two compounds have fluorescence and upconversion fluorescence, and their intensities increase with the ErCl3 ratio increasing in CdCl2. 9CdCl2·2ErCl3· 29H2O loses its crystal water by three steps in the temperature range from 55 to 215℃, while CdCl2·7ErCl3·42H2O loses its crystal water by one step in the temperature range from65 to 188C℃.

Key words: Quaternary system, Phase equilibrium, Cadmium chloride, Erbium chloride, Upconversion fluorescence