| 摘要 |
An article with a sintered decorative part obtained from a particulate mixture having the following chemical composition:
zirconia ZrO2: complement to 100%;0.5% to 10.0% of oxide(s) with a perovskite structure;2.0% to 20.0% of a stabilizer for zirconia selected from Y2O3, Sc2O3, MgO, CaO, CeO2, and mixtures thereof, the quantity MgO+CaO being less than 5.0%;less than 2.0% of a sintering additive selected from Al2O3, ZnO, TiO2, and mixtures thereof; andless than 2.0% of other oxides. |
| 主权项 |
1. A decorative article selected from the group consisting of a jewelry item, a watch, a bracelet, a necklace, a ring, a brooch, a tie-pin, a purse, a telephone, a piece of furniture, a household utensil, a handle, a button, a panel, a part of a spectacle frame, an item of crockery, and a frame, said article comprising a sintered part obtained from a particulate mixture having a chemical composition comprising, as percentages by weight based on the oxides:
zirconia ZrO2: complement to 100%; 0.5% to 10.0% of oxide(s) with a perovskite structure; 2.0% to 20.0% of a stabilizer for zirconia selected from the group consisting of Y2O3, Sc2O3, MgO, CaO, CeO2, and mixtures thereof, a quantity MgO+CaO being less than 5.0%; less than 2.0% of a sintering additive selected from the group consisting of Al2O3, ZnO, TiO2, and mixtures thereof; and less than 2.0% of other oxides; wherein: the oxide(s) with a perovskite structure and/or said stabilizer and/or said sintering additive are optionally replaced, completely or in part, by an equivalent quantity of precursor(s) of said oxides; and the stabilizer for zirconia comprises at least Y2O3 in an amount greater than 2% and less than 8%. |
