| 摘要 |
The invention relates to a porous structure containing a ceramic material mainly including or constituting an oxide material containing titanium, aluminium, zirconium and silicon with the following composition, in weight percentages on the basis of the oxides: 15% to 55% of Al2O3, 20% to 45% of TiO2, 1% to 30% of SiO2, 0.7% to 20% overall of at least one oxide selected among ZrO2, Ce2O3 and HfO2, less than 1% of MgO. Said composition also contains other elements selected, on the basis of the oxides, among CaO, Na2O, K2O, SrO, B2O3 andBaO, the total amount of said oxides being less than 15% and more than 1%, and said material being obtained by reactive sintering of said simple oxides or any of the precursors thereof or by thermal treatment of sintered grains with said composition. |
