Novel porous ceramic with high strength and thermal performance using MA hollow spheres

作     者：Anbang Chen Lang Li Chong Wang Qingyuan Wang Anbang Chen;Lang Li;Chong Wang;Qingyuan Wang

作者机构：Failure Mechanics and Engineering Disaster Prevention Key Laboratory of Sichuan Province College of Architecture and Environment Sichuan University MOE Key Laboratory of Deep Earth Science and Engineering College of Architecture and Environment Sichuan University 

出 版 物：《Progress in Natural Science:Materials International》 (自然科学进展·国际材料(英文))

年 卷 期：2022年第32卷第6期

页      面：732-738页

核心收录：

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

基　　金：financially supported by the National Natural Science Foundation of China (No. 12002226) 

主　　题：MA hollow Spheres Porous ceramics Thermal conductivity Mechanical property 

摘      要：The objective of this work is to obtain a multifunctional porous ceramic material at low cost with improved properties and that can be used in many applications like:thermal and acoustic insulation,refractory support and hot gas filtration *** that end,a novel facile strategy to fabricate porous ceramics by foaming and poreforming agent methods using magnesia-aluminum spinel hollow spheres(MASHSs) was reported for the first time,in which calcium aluminate cement(CAC) served as high-temperature *** influence of temperature ranging from 1500℃ to 1700℃ on the thermal conductivity,porosity and mechanical strength were *** results show that,the obtained MASHSs ceramic exhibits high porosity(67.2-71.9%) and thermal conductivity(0.18-0.38 W/mK),and compressive strength(6.1-17.1 MPa),which is mainly due to the change in crack directions and microstructure optimization with the prolong of firing *** crack directions changed from the surface of MASHSs to the interior MASHSs,which consumes more crack energy,and thus leading to the excellent mechanical *** is more,the introduction of MASHSs makes it difficult to lose heat at elevated temperature,and thereby improving the thermal conductivity of materials.