HIGHLY POROUS CERAMIC FOAMS FROM MAGNESIUM OXIDE STABILIZED PICKERING EMULSIONS

摘要

Ceramic foams with porosities over 90% are created by drying and sintering particle stabilizedoil-water emulsions. This technique is optimized for the creation of magnesium oxide (MgO) porousscaffolds. Processing parameters such as emulsion mixing speed, particle concentration, and dryingtime are related to final properties such as porosity, permeability, and mechanical strength. Thehydroxylation of magnesium oxide to form a gel can also be used to create green ceramics with verylow densities directly without the additional steps to form an emulsion. The quality of these ceramicfoams compares well to porous ceramics produced by other methods, specifically tape casting of anMgO slip with added poreformers and sponge impregnation of reticulated foam with a slip in areplication process.