摘要 |
The invention relates to fused ceramic beads, which have the following chemical composition in % by weight on the basis of the oxides: 40 to 95 % of ZrO2 and HfO2; at least one of Y2O3 and CeO2, with the provisos that Y2O3, when present, represents 0.1 to 10 % and CeO2, when present, represents 1 to 15 %, the total of Y2O3 and CeO2 representing 0.1 to 25 %; a quantity of SiO2 representing 10 to 45 % of the composition when CeO2 is absent from the composition and 0.5 to 45 % when CeO2 is present in the composition. Application to grinding and to dispersion in wet medium.
|