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Research Article | Open Access

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

Jia-Min WUa,b, Ying CHENa( ), Xiao-Yan ZHANGb, Qian HUANGb, Jin-Long YANGb( ), Yu-Sheng SHIa
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
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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.

Keywords

porous ceramicspoly-hollow microsphere (PHM)pore-forming agentphase evolutionmechanical properties

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Journal of Advanced Ceramics
Volume 5 Issue 2,
June 2016
Pages 176-182
DOI: 10.1007/s40145-016-0187-z

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WU J-M, CHEN Y, ZHANG X-Y, et al. Phase evolution and properties of novel Al2O3-based poly-hollow microsphere (PHM) ceramics. Journal of Advanced Ceramics, 2016, 5(2): 176-182. https://doi.org/10.1007/s40145-016-0187-z

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Received: 07 December 2015
Revised: 20 March 2016
Accepted: 22 March 2016
Published: 01 June 2016
© The author(s) 2016

Open Access The articles published in this journal are distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons. org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.