Fabrication of Porous Mullite Ceramics with High Porosity Using Foam-Gelcasting

Abstract:

In this paper, porous mullite ceramics with an apparent porosity up to 81 % were fabricated by foam-gelcasting using mullite powder as raw material with solid loading of 40 vol.%. The monomers content and sitering temperature have obvious effect on the properties of porous mullite ceramics. The apparent porosity of the prepared samples was in the range of 75~82%, compressive strength, was in the range of 3.0~16.02 MPa, and thermal conductivity was between 0.14 and 0.47 W/(m•K). A complex porous microstructure was formed, where large spherical pores contained small cellular pores on their internal walls.

• Periodical: Key Engineering Materials (Volumes 512-515)
• Pages: 580-585
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.512-515.580
• Online since: June 2012
• Authors: Feng Kun Yang, Cui Wei Li, Ya Mei Lin, Chan Gan Wang
• Keywords: Mullite, Porous Ceramics, Thermal Conductivity (TC)

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