Solicitante: Tardivat, C.|Mercier, E.|His, C.|Villermaux, F.
N. de solicitud: US20050658405
N. de publicación: US2009069167 A1
A method of manufacturing a porous ceramic part, comprising the following steps in succession: a) preparing a mixture M containing a ceramic powder in suspension, at least one gelling agent and at least one foaming agent, at a mixing temperature which is higher than the gelling temperature of the gelling agent; b) shearing the mixture M at a foaming temperature which is higher than the gelling temperature, to obtain a foam; c) gelling the foam by cooling the mixture M to a temperature below the gelling temperature of the gelling agent; and d) drying the gelled foam to obtain a perform. According to the invention, a stabilizing agent is added to the mixture M, which agent has an instantaneous viscosity, in Pa.s, that increases by a factor of at least ten when a shear rate of the stabilizing agent is reduced from 100 s-1 to 0.
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