物理化学学报 >> 2003, Vol. 19 >> Issue (03): 212 -215 .doi: 10.3866/PKU.WHXB20030305

研究论文 上一篇    下一篇

Mg(OH)2•2MgSO4•2H2O晶体的水热生长过程

朱黎霞;岳涛;高世扬;夏树屏   

  1. 中国科学院盐湖研究所西安二部,西安 710043;陕西师范大学应用化学研究所,西安 710062;兰州大学化学系,兰州 730000
  • 收稿日期:2002-06-21 修回日期:2002-08-09 发布日期:2003-03-15
  • 通讯作者: 夏树屏 E-mail:gsyabc@pub.xaonline.com

Hydrothermal Crystal Growth of Mg(OH)2•2MgSO4•2H2O

Zhu Li-Xia;Yue Tao;Gao Shi-Yang;Xia Shu-Ping   

  1. Xi’an Branch, Institute of Salt Lakes, Chinese Academy of Sciences, Xi’an  710043; Institute of Applied Chemistry, Shaanxi Normal University, Xi’an 710062; Department of Chemistry, Lanzhou University, Lanzhou 730000
  • Received:2002-06-21 Revised:2002-08-09 Published:2003-03-15
  • Contact: Xia Shu-Ping E-mail:gsyabc@pub.xaonline.com

摘要: 对MgSO4-NaOH-H2O四元交互体系在160 ℃水热条件下,相同物料配比,不同反应时间的晶体生长过程进行了研究,得到5Mg(OH)2•MgSO4•2H2O(简称MOS)晶须和Mg(OH)2•2MgSO4•2H2O棒状晶体两种硫氧镁化合物.通过化学分析、X-ray粉末衍射、FT-IR光谱和SEM对反应产物进行了表征.前者是该体系水热条件下介稳产物,而新的硫氧镁化合物Mg(OH)2•2MgSO4•2H2O是该体系的稳定相.

关键词: 硫氧镁化合物, 晶体生长, 水热合成, 介稳相, 稳定相

Abstract: The hydrothermal reaction processes of MgSO4-NaOH-H2O system with the same raw materials concentration for different reaction time at 160 ℃ have been studied. There are two magnesium oxysulfate compounds obtained by hydrothermal reaction, namely 5Mg(OH)2•MgSO4•2H2O(MOS) whisker and Mg(OH)2•2MgSO4•2H2O crystal. The compounds were characterized by chemical analysis, XRD, FT-IR and SEM. The 5Mg(OH)2•MgSO4•2H2O whisker is a metastable phase in MgSO4-NaOH-H2O system at 160 ℃,whereas the Mg(OH)2•2MgSO4•2H2O crystal is the stable phase.

Key words: Magnesium oxysulfate, Crystal growth, Hydrothermal synthesis,  Metastable phase, Stable phase