Patent ID: 8614001

Claim:
A sintered particle having a ratio between its smallest diameter and its largest diameter of more than 0.6 and having the following chemical analysis, as percentages by weight: Al 2 O 3 : 10%-60%; additive selected from CaO, a manganese oxide, La 2 O 3 , SrO, BaO and mixtures thereof: 0.2%-6%; the quantity of CaO being less than 2%; impurities: <2%; ZrO 2 partially stabilized with CeO 2 and Y 2 O 3 : complement to Al 2 O 3 , additive, and impurities, up to 100%; the zirconia being stabilized with CeO 2 and Y 2 O 3 present in molar quantities, as molar percentages based on the sum of ZrO 2 , CeO 2 and Y 2 O 3 , such that: CeO 2 : 6 mol %-11 mol %; and Y 2 O 3 : 0.5 mol %-2 mol %; the particle being obtained by sintering at a sintering temperature higher than 1300° C., the sintering temperature being higher than 1400° C. if the additive is CaO or if the molar CeO 2 content is in the range 10% to 11%.