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High-strength macro-porous alumina ceramics with regularly arranged pores produced by gel-casting and sacrificial template methods

  • Mengwen Zhang
  • Xiaodong Li
  • Mu ZhangEmail author
  • Zhimeng Xiu
  • Ji-Guang Li
  • Junpeng Li
  • Ming Xie
  • Jialin Chen
  • Xudong SunEmail author
Ceramics
  • 28 Downloads

Abstract

Macro-porous alumina ceramics were prepared by the gel-casting method using sacrificial polystyrene spheres as the template. The resulted porous alumina ceramics have regularly arranged pores and high cell wall densities, which confer high mechanical strength to the porous ceramics. The highest compressive strength for a porous alumina ceramic, with a relative density of 30%, in this work is 28 MPa, which is at least 74% higher than that of previously reported porous alumina ceramics with the same porosity. The results show that the cell wall density, window size and cell size can be adjusted by controlling the sintering temperature, solid loading percentage of the alumina slurry and the size of the polystyrene spheres. With the increase in cell wall density and decrease in cell size and window size, the compressive strength of the porous alumina increases. Thus, a novel porous structure with high porosity and high strength can be made by this flexible method which is also suitable for making complicated shapes and large sizes.

Notes

Acknowledgements

This work was supported by the National Natural Science Foundation of China (51872033, 51732007, 51472047), the National Key R&D Program of China (2017YFB0310300) and the fund of the State Key Laboratory of Advanced Technologies for Comprehensive Utilization of Platinum Metals (SKL-SPM-201505 and SKL-SPM-201506).

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© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Key Laboratory for Anisotropy and Texture of Materials (Ministry of Education), School of Materials Science and EngineeringNortheastern UniversityShenyangChina
  2. 2.Liaoning Engineering Laboratory of Special Optical Functional Crystals, College of Environmental and Chemical EngineeringDalian UniversityDalianChina
  3. 3.Research Center for Functional MaterialsNational Institute for Materials ScienceTsukubaJapan
  4. 4.State Key Laboratory of Advanced Technologies for Comprehensive Utilization of Platinum MetalsKunming Institute of Precious MetalsKunmingChina

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