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AssigneesSicat GmbH & Co. KG, Entre National de la Recherche Scientifigue, Universite Louis Pasteur de Strasbourg
InventorsCharlotte Pham, Laurie Pesant, Pierre Bernhardt, Michel Wolf, Cuong Pham-Huu, Marc-Jacques Ledoux, Michel Kartheuser, Estelle Vanhaecke
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This invention relates to β-SiC foam parts with a specific surface area preferably equal to at least 5 m2/g and with at least two zones A and B with a different cellular porosity distribution, wherein the parts were made by chemical transformation of a porous precursor medium comprising at least two blocks A′ and B′, each having a different cellular porosity distribution, and in that the at least two zones A and B are derived from the chemical transformation of the two blocks A′ and B′. This foam, optionally after deposition of an active layer, may be used as a filter medium in cartridges designed for the purification of exhaust gases. The invention also relates to manufacturing processes for preparing such a filter medium.
A β-SiC foam part having a specific surface area equal to at least 5 m2/g, and comprising at least two zones A and B, each having a different porosity distribution, wherein the foam part was made by chemical transformation of a porous precursor medium comprising at least two blocks A′ and B′, each having a different porosity distribution, and wherein the at least two zones A and B are derived from the chemical transformation of the at least two blocks A′ and B′.
A β-SiC foam part prepared using a process comprising:
Dependencies are inferred from the claim text.