Facile fabrication of cordierite-based porous ceramics with magnetic properties  

作　　者：Hao LI Cuiwei LI Huaiming JIA Guangjin CHEN Siyuan LI Kepi CHEN Chang-An WANG Liang QIAO 

机构地区：[1]Center of Materials Science and Engineering,School of Mechanical,Electronic and Control Engineering,Beijing Jiaotong University,Beijing 100044,China [2]School of Energy,Power and Mechanical Engineering,North China Electric Power University,Beijing 102206,China [3]State Key Laboratory of New Ceramics and Fine Processing,School of Materials Science and Engineering,Tsinghua University,Beijing 100084,China [4]College of Materials Science and Engineering,Zhejiang University of Technology,Hangzhou 310014,China

出　　处：《Journal of Advanced Ceramics》2022年第10期1583-1595,共13页先进陶瓷（英文）

基　　金：supported by the Fundamental Research Funds for the Central Universities(Grant Nos.2020YJS148 and 2022JBZY025);State Key Laboratory of New Ceramics and Fine Processing Tsinghua University(Grant No.KFZD201902);Beijing Natural Science Foundation(Grant No.2182059);the Beijing Government Funds for the Constructive Project of Central Universities.

摘　　要：In this paper,cordierite-based porous ceramics with magnetic properties have been firstly in-situ synthesized by using MgO,Al_(2)O_(3),and SiO_(2) powders as raw materials and Fe_(3)O_(4) as a functional additive.Combining with the foam freeze casting method,near net size fabrication(total linear shrinkage<2.86%)of the magnetic porous materials was realized by adjusting the amount of Fe_(3)O_(4).The porosity,compressive strength,and saturation magnetization of the prepared materials were 83.9%-87.8%,1.51-2.65 MPa,and 1.2-5.8 emu/g,respectively.The phase composition and microstructure evolutions during sintering were investigated briefly.The results showed that the synthesis temperature of cordierite was lowered about 100℃ due to the addition of Fe_(3)O_(4).Except for the main phase-cordierite,Mg-Al-Fe spinel and α-Fe_(2)O_(3) also existed in the final materials.The lattice parameters of the Mg-Al-Fe spinel and the amount of α-Fe_(2)O_(3) changed obviously with the change in the sintering temperature and Fe_(3)O_(4) amount,which mainly influenced the magnetic properties of the prepared materials.Thus,a facile fabrication method of the cordierite-based porous ceramics with the magnetic properties has been put forward in this paper.

关 键 词：porous cordierite ceramics phase composition MICROSTRUCTURE magnetic property 

分 类 号：TQ174.758.11[化学工程—陶瓷工业]