Macroporous Ceramics from Particle-Stabilized Wet Foams
Abstract:We present a novel direct-foaming method to produce macroporous ceramics using particles instead of surfactants as stabilizers of the wet foams. This method allows for the fabrication of ultra-stable wet foams that resist coarsening upon drying and sintering. Macroporous ceramics of various chemical compositions with open or closed cells, average cell sizes ranging from 10 to 300 m and porosities within 45% and 95%, can be easily prepared using this new approach. The sintered foams show high compressive strengths of up to 16 MPa in alumina foams with porosities of 88%.
Document Type: Research Article
Affiliations: Department of Materials, ETH Zürich, Zürich, CH-8093, Switzerland
Publication date: 2007-01-01