硫氧镁基导热胶凝材料的制备及性能研究  

Preparation and properties of thermal conductive magnesium oxysulfide cementitious material

作　　者：靳秀芝[1] 邸炜原 任万彪 韩涛[1,3] JIN Xiuzhi;DI Weiyuan;REN Wanbiao;HAN Tao(School of Materials Science and Engineering,North University of China,Taiyuan 030051,China;School of Science,North University of China,Taiyuan 030051,China;School of Materials Science and Engineering,Shanxi College of Technology,Shuozhou 036000,China)

机构地区：[1]中北大学材料科学与工程学院,山西太原030051 [2]中北大学理学院,山西太原030051 [3]山西工学院材料产业学院,山西朔州036000

出　　处：《新型建筑材料》2022年第11期116-120,126,共6页New Building Materials

基　　金：山西省煤基低碳科技重大专项(MC2016-02)。

摘　　要：硫氧镁水泥(MOS)作为一种新型胶凝材料,具有耐火、低碱度、质量轻、绝缘和导热性好等优点。研究了MgO与MgSO_(4)和H_(2)O与MgSO_(4)摩尔比(MgO/MgSO_(4)和H_(2)O/MgSO_(4))对硫氧镁胶凝材料导热性能的影响及其机理。用X射线衍射和扫描电镜分析了MOS水泥水化产物的相组成和微观结构。通过水化热研究了MOS水泥的水化过程。结果表明:较大的MgO/MgSO_(4)和较小的H_(2)O/MgSO_(4)摩尔比可使MOS硬化水泥石产生较多水化产物,提高致密性,有利于提高MOS的导热性能。MgO/MgSO_(4)为12∶1、H_(2)O/MgSO_(4)为19∶1时,导热系数达到最大,为2.07 W/(m·K)。As a new type of cementitious material,magnesium oxysulfate cement(MOS)shows advantages of fire resistance,low alkalinity,light weight,insulation,and good thermal conductivity.Effects of n(MgO)/n(MgSO_(4))and n(H_(2)O)/n(MgSO_(4))on the thermal conductivity and microstructure mechanism of magnesium oxysulfate cement are studied.The phase composition and microstructure of MOS cement hydration products are analyzed by X-ray diffraction and scanning electron microscopy.The hydration process of MOS cement is measured by hydration heat release rate.The results show that the mixture with higher molar ratio of MgO/MgSO_(4) and lower molar ratio of H_(2)O/MgSO_(4) can produce more hydration products,which benefits the thermal conductivity and densification of MOS cement.The thermal conductivity is optimal when n(MgO)/n(MgSO_(4))is 12∶1 and n(H_(2)O)/n(MgSO_(4))is 19∶1.The maximum thermal conductivity can reach 2.07 W/(m·K).

关 键 词：硫氧镁水泥 导热系数 配合比:水化热 

分 类 号：TU551.3[建筑科学—建筑技术科学] TU111.24