| 摘要 |
The invention concerns a method for producing an orange item made from zirconia characterised by the fact that it comprises the successive steps consisting of producing a first mixture comprising zirconia powder, 3 to 20% by weight of at least one stabiliser chosen from the group of oxides comprising yttrium oxide, magnesium oxide, and calcium oxide alone or in combination, 0.1% to 5% by weight of at least one element intended to produce a vitreous phase, and chosen from the group comprising silicon oxide, aluminium oxide, lithium oxide and yttrium oxide alone or in combination, 1% to 6% by weight of a cerium oxide powder; producing a second mixture comprising said first mixture and a binder; producing a granulated mixture by granulating said second mixture; forming a blank by giving this granulated second mixture the shape of the desired item; sintering in air for at least thirty minutes at a temperature of between 1,250 and 1,500 degrees C, and annealing the desired item at a temperature of between 700 degrees C and 1,350 degrees C for a period of between 30 minutes and 20 hours in a reducing atmosphere, and polishing said sintered blank. |
