STUDIES ON THE BASIC COMPOUNDS OF MAGNESIA CEMENT - THE THERMAL-BEHAVIOR OF MAGNESIUM OXYCHLORIDES

被引：60

作者：

XIA, SP

XING, PF

GAO, SY

机构：

[1] Institute of Salt Lake, Academia Sinica

来源：

THERMOCHIMICA ACTA | 1991年 / 183卷

关键词：

D O I：

10.1016/0040-6031(91)80471-T

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The magnesium oxychlorides, 5Mg(OH)2.MgCl2.8H2O and 3Mg(OH)2.MgCl2.8H2O, were prepared by dissolving active MgO in magnesium chloride solution to form a metastable system; the two crystalline oxychloride phases then form, one after the other, both with 5-form structure (S. Sorel, C.R., 65 (1867) 102; W.F. Cole and T. Demeduck, Aust. J. Chem., 8 (1955) 234). The samples of magnesium oxychlorides were studied by chemical analysis and confirmed by X-ray powder diffraction, DTA, DSC, TG, DTG, IR spectroscopy and electron microscopy. The results showed that both compounds change during heating at different temperatures but that the final products were both MgO. Their DELTA-H values of dehydration and decomposition were determined by DSC, and the thermochemical reactions are given.

引用

页码：349 / 363

页数：15

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