孔结构对闭孔发泡陶瓷力学性能的影响研究  

Effects of pore structure on the mechanical properties of closed-pore foamed ceramic

作　　者：周明凯[1] 葛雪祥 ZHOU Mingkai;GE Xuexiang(School of Material Science and Engineering,Wuhan University of Technology,Wuhan 430070,China;School of Material Science and Engineering,Anhui University of Technology,Maanshan 243032,China)

机构地区：[1]武汉理工大学材料科学与工程学院,湖北武汉430070 [2]安徽工业大学材料科学与工程学院,安徽马鞍山243032

出　　处：《新型建筑材料》2023年第5期134-139,144,共7页New Building Materials

基　　金：“十三五”国家重点研发计划项目(2018YFD1101000)。

摘　　要：以炉渣为主要原料制备了具有不同孔结构特征的发泡陶瓷。通过表征试样的平均孔径、孔径离散系数等孔结构参数,分析了孔径与孔径分布对发泡陶瓷力学性能的影响机理。结果表明,随着孔径的增大,相同体积密度的发泡陶瓷试样抗压强度显著降低,强度波动愈加显著,且孔径对高密度发泡陶瓷强度的影响更加明显。孔径分布也会显著影响发泡陶瓷的抗压强度,当孔径离散系数由0.184增至0.579时,抗压强度由10.05 MPa降至5.57 MPa。调控发泡陶瓷的材料组成和制备工艺,促使其获得孔径微小且分布均一的孔结构,可有效提高发泡陶瓷的力学性能。Foamed ceramics with different pore structures were prepared using coal slag as the main raw material.The influencing mechanism of the pore size and pore size distribution on the mechanical properties of foamed ceramics was analyzed by characterizing the average pore size,dispersion coefficient of pore size.The result shows that the compressive strength decreases rapidly with the increase of pore size for the samples with the same bulk density,the fluctuation of strength becomes more significant,and the influence of pore size on the strength of high-density foam ceramics is more significant.The pore size distribution also affects the compressive strength of foamed ceramics.When the dispersion coefficient of pore size increases from 0.184 to 0.579,a sharp decrease from 10.05 MPa to 5.57 MPa happened on the compressive strength.The mechanical properties of foamed ceramics can be effectively improved by regulating the material composition and preparation process to achieve a pore structure with small pore sizeand uniform distribution in foamed ceramics.

关 键 词：发泡陶瓷 抗压强度 平均孔径 孔径分布 炉渣 

分 类 号：TU551.33[建筑科学—建筑技术科学]