【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CdCl·2H2O(原始盐)、9CdCl·22ErCl3·29H2O、CdCl·27ErCl·342H2O、ErCl3·6H2O(原始盐)组成的复杂体系.对两个新物相化合物9CdCl2·2ErCl·329H2O和CdCl·27ErCl3·42H2O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,CdCl2·7ErCl·342H2O则1步失去其结晶水.更多还原

【Abstract】 The equilibrium solubility of the quaternary system ErCl3-CdCl2-HCl-H2O was determined at 25 ℃ 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 new compounds, 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 from 65 to 188 ℃.更多还原