"Phase evolution and properties of novel Al<sub>2</sub>O<sub>3</sub>-ba" by Jia-Min WU, Ying CHEN et al.

Article Title

Phase evolution and properties of novel Al₂O₃-based poly-hollow microsphere (PHM) ceramics

Authors

Jia-Min WU, State Key Laboratory of Materials Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
Ying CHEN, State Key Laboratory of Materials Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
Xiao-Yan ZHANG, State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
Qian HUANG, State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
Jin-Long YANG, State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
Yu-Sheng SHI, State Key Laboratory of Materials Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China

Keywords

porous ceramics, poly-hollow microsphere (PHM), pore-forming agent, phase evolution, mechanical properties

Abstract

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.

DOI

https://doi.org/10.1007/s40145-016-0187-z

Publisher

Tsinghua University Press

Recommended Citation

Jia-Min WU, Ying CHEN, Xiao-Yan ZHANG et al. Phase evolution and properties of novel Al2O3-based poly-hollow microsphere (PHM) ceramics. Journal of Advanced Ceramics 2016, 5(2): 176-182.

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