均分散胶体的研究——Ⅰ.钇化合物均分散胶体的形成  

STUDY ON MONODISPERSED COLLOID Ⅰ. Formation of Monodispersed Colloidal Yttrium Compound System

作　　者：王光信[1] 赵长贵[1] 陈宗淇[1] 张玉苓[2] 

机构地区：[1]青岛化工学院应用化学系,青岛266042 [2]中国科学院物理研究所

出　　处：《物理化学学报》1991年第6期655-661,共7页Acta Physico-Chimica Sinica

基　　金：国家自然科学基金

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。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 prieipitation phase and provided necessary condition for formation of the mouodispersed 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.

关 键 词：均分散胶体 钇化合物 制备 胶体 

分 类 号：O648.1[理学—物理化学]