【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。更多还原

【Abstract】 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.更多还原