| 简介 |
The invention relates to a cellular structure comprising a porous ceramic material that contains aluminium titanate having a thermal expansion coefficient lower than 2.5.10-6/°C between 20 and 1000°C, wherein said structure further has a porosity higher than 10% and a pore size of 5 to 60 microns, said structure being characterised in that the composition of the porous ceramic material includes, in mass, from 30 to 60 % of Al2O3, from 30 to 60% of TiO2, from 1 to 20% of SiO2, less than 10% of MgO, less than 0.5% of oxides of the group Na2O, K2O, SrO, CaO, Fe2O3, BaO and rare earth oxides, said structure being further characterised in that it has a dimensional linear post-variation lower than ±0, 3% after heating at 1500°C. The invention also relates to a filter or a catalytic substrate obtained from said structure. |
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