PROCESS OF MANUFACTURE OF POROSA CERAMIC PART, POROSA CERAMIC PART

摘要

process for making a porous ceramic piece, porous ceramic foam and use of a ceramic foam manufacturing process for a porous ceramic piece comprising the following successive steps: a) preparing a mixture m containing a suspended ceramic powder, at least one agent gelling agent and at least one foaming agent at a mixing temperature above the gelling temperature of said gelling agent, b) shearing said mixture at a foaming temperature above said gelling temperature, until a foam is obtained, c) gelling said foam by cooling said mixture to a temperature below the gelling temperature of said gelling agent, d) drying said gelled foam to a preform. According to the invention, a stabilizing agent is added to said mixture whose instantaneous viscosity, in p.s. s, increases at least a factor ten when a shear rate of said stabilizing agent decreases from 100s ^ -1 ^ to 0s ^ -1 ^.