Abstract: 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.

Abstract: The invention relates to a filter of which the filtering portion is made from an inorganic material comprising grains of SiC bonded by a vitroceramic phase, to form a porous structure of which the apparent porosity is between 20 and 70%, said vitroceramic bonding phase comprising at least the following components, in molar percentage of the total oxides present in said phase: SiO2: 30% to 80% Al2O3: 5% to 45% MO: 10% to 45%, where MO is an oxide of a divalent cation or the sum of the oxides of the divalent cations present in said vitroceramic phase, M preferably being selected from Ca, Ba, Mg or Sr, said vitroceramic phase having a volume percentage of residual vitreous phase lower than 20%.

Abstract: Catalytic filter comprising a porous matrix consisting of an inorganic material, in the form of grains that are interconnected so as to provide cavities between them, such that the open porosity is between 30 and 60% and the median pore diameter is between 5 and 40 ?m, said filter being characterized in that the grains and possibly the grain boundaries of the inorganic material are covered over at least part of their surface with a texturizing material, said texturizing consisting of irregularities having dimensions of between 10 nm and 5 microns and in that a catalytic coating at least partially coats the texturizing material and optionally, at least partially, the grains of the inorganic material.

Abstract: The invention relates to a process for obtaining a structure made from a porous ceramic material comprising at least 95% of silicon carbide SiC, said process being characterized in that said structure is obtained from a mixture of SiC grains comprising at least: a first fraction of ?-SiC grains whose median diameter is less than 5 microns; a second fraction of ?-SiC grains whose median diameter is at least two times greater than that of the first fraction of ?-SiC grains and whose median diameter is greater than or equal to 5 microns; and a fraction of ?-SiC grains or of at least a precursor of ?-SiC grains. The invention also relates to the porous structure obtained according to the process.

Abstract: The invention relates to an assembled structure that can be used, after deposition of a catalyst, for filtering a gas loaded with soot particles and pollutants in the gas phase in which the cement used as a coating cement and/or as a joint cement comprises, at least at the surface, a hydrophobic or oleophobic material. The invention also relates to the assembled catalytic filter obtained after impregnating with a catalytic solution of said structure and also to the process for manufacturing the filter from said structure.

Abstract: 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.

Abstract: The invention relates to a method for measuring the uniformity of the deposit of soot in a particulate filter, comprising the steps consisting in measuring, simultaneously or in succession, the respective characteristic quantities of at least two gas streams each having passed through a different longitudinal portion of said filter, and then in comparing the characteristic quantities thus measured. It also relates to a method for controlling the regeneration of a particulate filter, comprising the steps consisting in measuring the uniformity of the soot deposit in said filter and in adjusting the parameters of said regeneration according to the uniformity value obtained.