文献类型：期刊文献

中文题名：针状碱式氯化镁的合成及形态分析

英文题名：Synthesis and Morphology Characterization of Aciculate Basic Magnesium Chloride

作者：李春忠[1];古庆山[1];程起林[1];张玲[1]

机构：[1]华东理工大学材料科学与工程学院超细材料制备与应用教育部重点实验室,上海200237

年份：2005

卷号：31

期号：3

起止页码：314

中文期刊名：华东理工大学学报（自然科学版）

外文期刊名：Journal of East China University of Science and Technology

收录：CSTPCD;;EI(收录号：2005289209185);Scopus;北大核心:【北大核心2004】；CSCD:【CSCD2011_2012】；

基金：国家自然科学基金(20236020;20176009);上海市基础研究重大项目(04DZ14002);教育部<跨世纪优秀人才培养计划>;上海市纳米科技基金项目等资助

语种：中文

中文关键词：碱式氯化镁;氢氧化镁;氢氧化钙;氨水

外文关键词：basic magnesium chloride; magnesium hydroxide; calcium hydroxide; ammonia

摘要：以氯化镁、氢氧化钙为原料合成了碱式氯化镁,利用TEM和XRD表征了固体产物的形态结构,分析了合成过程机理。在MgCl2/Ca(OH)2-CaCl2与MgCl2/NH4OH体系合成碱式氯化镁时,固体产物的形态结构主要取决于体系的pH值和熟化时间;在pH值小于9.5时利用MgCl2/NH4OH体系可以得到组成和结构良好的碱式氯化镁。对于MgCl2/Ca(OH)2-CaCl2体系,氢氧化钙含量增加或熟化时间延长,有利于得到针状碱式氯化镁。Ca(OH)2与MgCl2的反应历程不同于NH3·H2O,得到的碱式氯化镁在形貌和性质上存在很大差别。
Basic magnesium chloride was synthesized using MgCl2, NH3·H2O and Ca(OH)2 as the raw materials, and the structure and morphology of the solid particles formed in the synthesis processes were characterized by transmission electron microscopy and X-ray diffraction, and then the mechanisms were also indicated according to the morphology change of the solid particles. The structure and morphology of basic magnesium chloride were mainly affected by pH and ageing time when it was synthesized by MgCl2/Ca(OH)2-CaCl2 and MgCl2/NH4OH, and aciculate basic magnesium chloride can be easily obtained when pH was controlled less than 9.5 by MgCl2/NH4OH. Aciculate basic magnesium chloride particles can be synthesized at higher Ca(OH)2 concentration and longer ageing time. The structure and morphology of solid particles are different when they were synthesized by MgCl2/Ca(OH)2-CaCl2 and by MgCl2/NH4OH because of the different mechanisms.