文献类型：期刊文献

英文题名：Thermal Decomposition Mechanism of MgCl₂ ? 6H₂O

作者：Huang Qiong-Zhu[1];Lu Gui-Min[1];Wang Jin[1];Yu Jian-Guo[1]

机构：[1]E China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China

年份：2010

卷号：25

期号：3

起止页码：306

外文期刊名：JOURNAL OF INORGANIC MATERIALS

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000276281300016)】；

语种：英文

外文关键词：MgCl2 center dot 6H(2)O; Mg(OH)Cl center dot 0.3H(2)O; dehydration; hydrolysis; thermal decomposition

摘要：The thermal decomposition mechanism and the intermediate morphology of MgCl2 center dot 6H(2)O before and after calcination by a resistance furnace, were studied using integrated thermal analysis, X-ray diffraction, scanning electron microscope, energy dispersive X-ray spectrum and chemical analysis. The results showed that there were six steps in the thermal decomposition of MgCl2 center dot 6H(2)O, producing MgCl2 center dot 4H(2)O at 69 degrees C, MgCl2 center dot 2H(2)O at 129 degrees C, MgCl2 center dot nH(2)O (1 <= n.<= 2) and MgOHCl at 167 degrees C, and the MgC12 center dot nH(2)O (1 <= n <= 2) converted to Mg(OH)Cl center dot 0.3H(2)O with dehydration and hydrolysis simultaneously at 203 degrees C, Mg(OH)Cl center dot 0.3H(2)O dehydrated to MgOHCl at 235 degrees C, MgOHCl directly converted to MgO at 415 degrees C. The MgOHCl particle was irregular with porous structure, while Mg(OH) C1 center dot 0. 3H(2)O particle had relatively flat surface.