| 简介 |
The invention refers to a structure of the type in honeycomb, including/understanding a porous ceramic material containing Aluminium titanate whose coefficient of thermal expansion between 20 and 1000°C is lower than 2, 5.10-6/°C, the aforementioned structure having moreover a porosity higher than 10% and one size of the pores centered between 5 and 60 microns, the aforementioned structure being characterized in that the composition of porous ceramic material includes/understands in mass from 30 to 60% of Al2O3, from 30 to 60% of TiO2, 1 to 20% of Si02, less than 10% of MgO, less than 0, 5% of oxides of the Na20 group, K20, SrO, CAD, Fe203, BaO and oxides of rare earths, the aforementioned structure being characterized moreover in what it presents a post variation linear of size, after heating with 1500°C, lower than +-0, 3%. The invention also refers to a filter or a catalytic support obtained starting from such a structure. |
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