物理化学学报 >> 1991, Vol. 7 >> Issue (06): 655-661.doi: 10.3866/PKU.WHXB19910605

研究论文 上一篇    下一篇

均分散胶体的研究 I. 钇化合物均分散胶体的形成

王光信; 赵长贵; 陈宗淇; 张玉苓   

  1. 青岛化工学院应用化学系,青岛 266042;中国科学院物理研究所
  • 收稿日期:1990-05-09 修回日期:1990-10-28 发布日期:1991-12-15
  • 通讯作者: 王光信

Study on Monodispersed Colloid I. Formation of Monodispersed Colloidal Yttrium Compound System

Wang Guang-Xin; Zhao Chang-Gui; Chen Zong-Qi; Zhang Yu-Ling   

  1. Department of Applied Chemistry, Qingdao Institute of Chemical Technology, Qingdao 266042; Institute of Physics, Chinese Academy of Sciences
  • Received:1990-05-09 Revised:1990-10-28 Published:1991-12-15
  • Contact: Wang Guang-Xin

摘要: 已制备了球形、尺寸分布很窄的粒子组成的YOHCO_3·H_2O及Y_2O_3均分散胶体。用电子显微镜、红外光谱及电导率等方法对这些均分散体系的组成及形成过程进行了初步探讨。

关键词: 均分散胶体, YOHCO3•, H2O, Y2O3制备

Abstract: Monodispersed colloidal YOHCO_3·H_2O and Y_2O_3 systems consisting of spherical particles of narrow size distribution were obtained. The formation of those monodispersed colloidal systems was primarily investigated by using the techniques including transmision and scanning electron mieroseopy,IR spectroscopy and electrical conductivity. The change of electrical conductivity in the course of aging YCl_3 solution with urea revealed that the slow decomposition of urea and release of CO_3~(2-) at elevated temperature controlled the generation of pricipitation phase and provided necessary condition for formation of the monodispersed system.
The transformation of calcining monodispersed powders of YOHCO_3·H_2O was observed through SEM. During the process of calcining YOHCO_3·H_2O at 850 ℃, the powders were melten first before formation of monodispersed spheres of Y_2O_3.

Key words: Monodispersed colloid, YOHCO3•, H2O, Y2O3, Preparation