煤矸石制备多孔复相陶瓷材料及导热系数研究

Thermal Conductivity Research of Multiphase Porous Ceramic Synthetized by Coal Gangue

利用煤矸石作为主要原料,以有机物交联丙烯酸树脂（AMR）作为造孔剂,合成多孔复相陶瓷,用作保温材料。通过对材料性能测试表明,随着造孔剂含量的增加,材料的体积密度下降、气孔率增加、导热系数和抗压强度也降低。添加10%~40%AMR造孔剂后合成的多孔陶瓷性能符合高效能外墙外保温材料标准。通过对合成样品导热系数和气孔率关系的研究,表明两相材料导热系数模型中的有效介质理论公式可以应用于多孔复相陶瓷中。

The foam ceramic was synthesized by the coal gangue as the main materials and the AMR as the pore forming substance. In our results,when the content of the AMR increase,the porosity increased and the volume density,thermal conductivity and the compressive strength decreased,respectively. The samples added 10%-40% AMR meet the porous requirement of the highly efficient composite exterior insulation materials. By the research of the porosity and thermal conductivity,we find that the effective medium theory,one of the two-phase thermal conductivity models,is applicable for the porous multiphase ceramic.