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首页> 外国专利> SIC FILTRATION STRUCTURE WITH IMPROVED THERMOMECHANICAL PROPERTIES

SIC FILTRATION STRUCTURE WITH IMPROVED THERMOMECHANICAL PROPERTIES

机译：具有改善的热机械性能的SIC过滤结构

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The invention relates to a porous structure and catalytic filter for treating solid particles and gaseous pollutants from the combustion gases of an internal combustion engine, including a porous matrix forming a set of longitudinal channels separated by porous walls consisting of silicon carbide, said walls consisting of grains connected together by grain joints so as to define an interconnected network of pores, said structure being characterized in that said grains and/or the grain joints forming said porous walls are covered, on at least 1% of the surface thereof, by a texturing, said texturing consisting of a material placed on the surface of the grains and/or of the grain joints in the form of irregularities distributed among a plurality of continuous strips with a mean width, at the surface of said grains and/or grain joints, of between 100 nm and 5 microns, and a mean thickness, at the surface of said grains and/or grain joints, of less than 1 micron, the material forming said strips at the surface of the grains and/or grain joints consisting mainly of silicon oxide.
机译：本发明涉及一种用于处理来自内燃机的燃烧气体的固体颗粒和气态污染物的多孔结构和催化过滤器，该多孔结构和催化过滤器包括形成一组纵向通道的多孔基质，该纵向通道被由碳化硅构成的多孔壁分隔开，所述壁包括：通过晶粒接头连接在一起的晶粒以形成相互连接的孔网络，所述结构的特征在于，所述晶粒和/或形成所述多孔壁的晶粒接头在表面的至少1％上被纹理化覆盖。所述纹理由在所述晶粒和/或晶粒接头的表面上以不规则形式分布在所述晶粒和/或晶粒接头的表面上的材料组成，所述不规则形状分布在多个具有平均宽度的连续条带中，所述晶粒和/或晶粒接头的表面的平均厚度为100nm至5微米，且平均厚度小于1微米，在主要由氧化硅组成的晶粒和/或晶粒接合处的表面剥落。

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