| abstract |
The invention relates to a granulated powder intended, in particular, for the production of ceramic sintered parts, said powder having the following chemical weight composition, based on dry matter, namely: a zirconia stabilizer selected from the group containing Y2O3, Sc2O3, MgO, CaO, CeO2, and mixtures thereof, the weight content of stabilizer, based on the total zirconia and stabilizer content, being between 2% and 20% and the MgO+CaO content being less than 5% based on the total zirconia and stabilizer content; at least 1% of a first binder having a glass transition temperature less than or equal to 25° C.; 0-4% of an additional binder having a lass transition temperature greater than 25° C.; 5-50% alumina; 0-2% of an alumina sintering additive; 0-4% of a temporary additive different from the first binder and the additional binder, the total content of the first binder, the additional binder and the temporary additive being less than 9%; 0-6% of an additional oxide selected from a manganese oxide, ZnO, La2O3, SrO, BaO and mixtures thereof; less than 2% impurities; and ZrO2 to make up 100%. According to the invention, the total lanthanum oxide content is less than 6%, the median diameter D50 of the powder is between 80 and 130 μm, the percentile D99.5 is less than 500 μm and the relative density of the granules is between 30% and 60%. |