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

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 appa...

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Bibliographic Details
Published in:Key engineering materials 2012-06, Vol.512-515, p.580-585
Main Authors: Lin, Ya Mei, Wang, Chan Gan, Yang, Feng Kun, Li, Cui Wei
Format: Article
Language:English
Subjects:
Ceramics
Microstructure
Monomers
Mullite
Porosity
Raw materials
Thermal conductivity
Walls
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Summary: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.
ISSN:1013-9826
1662-9795
1662-9795
DOI:10.4028/www.scientific.net/KEM.512-515.580