硅酸盐学报2017，Vol.45Issue(2)：317-322,6.DOI:10.14062/j.issn.0454-5648.2017.02.21
西藏班戈湖水菱镁的矿热分解特性
Thermal Decomposition Characteristics of Hydromagnesite From Bangor Lake in Tibet
摘要
Abstract
Thermal decomposition process and properties of the gas and solid products of the hydromagnesite from Bangko Co area in Tibet were investigated by thermogravimetry-differential scanning calorimetry, thermogravimetry-mass spectrometry and in-situ X-ray diffraction, respectively. In addition, the thermal decomposition mechanism of hydromagnesite was discussed. The results indicate that the hydromagnesite occurs multiple endothermic decomposition reactions at 150–650℃ with a heat absorption capacity of 889.8 J/g. The crystal water is dehydrated before 350℃ with the generation of amorphous carbonic magnesium compounds. The structural water is lost gradually after 350℃ and CO2is decarburized at 350–550℃, forming periklase. It is also indicated that the releases of H2O and CO2 at different temperatures should be attributed to the complicated H-bonds and different carbonate structures in the crystal structure of hydromagnesite.关键词
水菱镁矿/热分解特性/晶体结构/热分解机理Key words
hydromagnesite/thermal decomposition characteristics/crystal structure/thermal decomposition mechanisms分类
航空航天引用本文复制引用
田海山,刘立新,孙志明,郑水林..西藏班戈湖水菱镁的矿热分解特性[J].硅酸盐学报,2017,45(2):317-322,6.基金项目
中央高校基本科研业务费项目(2010YH10，2015QH01)。 （2010YH10，2015QH01）
