RT Journal Article A1 Jia-Min WU,Ying CHEN,Xiao-Yan ZHANG,Qian HUANG,Jin-Long YANG,Yu-Sheng SHI; AD Huazhong University of Science and Technology, 430074, 中国 ; Tsinghua University, 100084, 中国 ; Huazhong University of Science and Technology, 430074, 中国 ; Tsinghua University, 100084, 中国 ; Tsinghua University, 100084, 中国 ; Tsinghua University, 100084, 中国 ; Huazhong University of Science and Technology, 430074, 中国 T1 Phase evolution and properties of novel Al2O3-based poly-hollow microsphere (PHM) ceramics YR 2016 IS 2 vo 5 OP 176-OP 182 K1 mechanical properties;porous ceramics;poly-hollow microsphere (PHM);pore-forming agent;phase evolution AB In this paper, novel Al2O3-based poly-hollow microsphere (PHM) ceramics were prepared using Si3N4 and Al2O3 PHMs as pore-forming agents. The effect of Si3N4 and Al2O3 PHMs with different percentages on properties of Al2O3-based PHM ceramics was investigated. Through adjusting percentage of Al2O3 PHMs, Al2O3-based PHM ceramics with enhanced properties are achieved. X-ray diffraction (XRD) results show that main phases of Al2O3-based PHM ceramics vary from β-SiAlON (z value increases from 2.9 to 4) to Al2O3 with the increase of percentage of Al2O3 PHMs from 10% to 100%. The different phase compositions result in different properties of Al2O3-based PHM ceramics. With the increase of percentage of Al2O3 PHMs, porosity of Al2O3-based PHM ceramics gradually decreases, while their shrinkage, flexural strength, and fracture toughness firstly decrease and then increase. Using different kinds of ceramic PHMs as pore-forming agents, various novel and high-performance porous ceramics could be prepared via optimizing percentage of ceramic PHMs in the future. SN 2226-4108 LA EN