*Member, The American Ceramic Society.
Microstructural Control of Self-Setting Particle-Stabilized Ceramic Foams
Article first published online: 29 SEP 2010
© 2010 The American Ceramic Society
Journal of the American Ceramic Society
Volume 94, Issue 1, pages 77–83, January 2011
How to Cite
Krauss Juillerat, F., Gonzenbach, U. T., Elser, P., Studart, A. R. and Gauckler, L. J. (2011), Microstructural Control of Self-Setting Particle-Stabilized Ceramic Foams. Journal of the American Ceramic Society, 94: 77–83. doi: 10.1111/j.1551-2916.2010.04040.x
A. Bandyopadhyay—contributing editor
This work was financially supported by the Competence Centre for Materials Science and Technology (CCMX, SPERU).
- Issue published online: 5 JAN 2011
- Article first published online: 29 SEP 2010
- Manuscript No. 27754. Received April 12, 2010; approved July 1, 2010.
The ability to tailor the microstructure of porous ceramics is essential in order to fulfill the requirements of various applications. Depending on the use of porous ceramics, microstructures with open or closed pores, adjustable pore sizes, and a possible self-setting ability of the wet foam are required. We present a direct foaming method to synthesize self-setting foams with controlled microstructures, based on our previous studies on particle-stabilized foams. For the experimental set-up, alumina particles were partially hydrophobized with propyl gallate and the resulting suspensions were combined with a calcium aluminate cement reaction. Pore size and the fraction of open pores can be controlled by the particle concentration and the setting rate of the cement reaction. As a result, self-setting ceramic–cement composites with porosities ranging from 40 to 95 vol% and closed as well as open pores with sizes between 30 μm and 1 mm were achieved. Compared with other methods used to produce self-setting inorganic macroporous materials, foams made with this method cover a wider pore size and porosity range and reach higher total porosities.