低品位煤矸石合成建筑用外墙保温材料的研究  

Study on the Exterior Thermal Insulation Materials Synthesized with the Coal Gangue

作　　者：甄强[1,2] 王方方[1] 王亚丽[1] 李榕[1] 宋绍雷[1] 

机构地区：[1]上海大学纳米科学与技术研究中心,上海200444 [2]上海大学材料科学与工程学院,上海200444

出　　处：《硅酸盐通报》2014年第4期709-714,共6页Bulletin of the Chinese Ceramic Society

基　　金：国家自然科学基金项目(51072112;51272154);攀枝花市科技局产业推进项目(2012CY-S-18)

摘　　要：利用低热值高硅低品位煤矸石作为主要原料,同时以石灰石中的碳酸钙作为造孔剂,通过控制烧结过程,最终合成泡沫陶瓷保温材料,并利用XRD、SEM、导热系数仪等对样品进行表征。实验结果表明,随着石灰石含量增加,样品的气孔率增加、体积密度减小、导热系数和抗压强度也随着减小。当石灰石与煤矸石的比例分别为0.5∶1、1∶1时,样品的体积密度分别为1.26 g/cm3、1.06 g/cm3,导热系数分别为0.23 W/(m·K)、0.15 W/(m·K),抗压强度分别为17.99 MPa、6.39 MPa,符合高效能复合外墙外保温材料标准。The coal gangue consisting of the silica as the main material, and the limestone as the pore forming substance, were used to synthetize the foam ceramic by controlling the sinter process. The samples were characterized by the XRD, SEM and the thermal conductivity measuring instrument and so on. The results showed that when the amount of the limestone increased, the porosity increased, and the volume density, thermal conductivity and the compressive strength decreased, respectively. When the mass ratio between the limestone and the coal gangue was 0.5 ： 1,1 ： 1, the samples＇ volume density were 1.26 g,/cm3, 1.06 g/cm3, the thermal conductivity were 0.23 W/（m· K） ,0, 15 W/（m· K）, and the compressive strength were 17.99 MPa, 6. 39 MPa, respectively. It can be proved that the samples synthesized with those ratios were fit for the requirement of the highly efficient composite exterior insulation materials.

关 键 词：煤矸石 石灰石 泡沫陶瓷 外墙保温材料 导热系数 

分 类 号：TQ174[化学工程—陶瓷工业]