Method for manufacturing a coloured item, in particular coloured orange, made of zirconia, and coloured zirconia decorative item obtained according to said method

摘要

The invention relates to a method for manufacturing an orange article based on zirconia, characterized in that it comprises the successive steps of producing a first mixture comprising a zirconia powder, 3 to 20% by weight of at least a stabilizer 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 to achieve a glassy phase, and selected from the group consisting of silicon oxide, aluminum 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 imparting to that second granulated mixture the shape of the desired article; sinter in air for at least 30 minutes at a temperature of between 1250 and 1500 DEG. C, and annealing the desired article at a temperature between 700 DEG. C and 1'350 DEG. C for a period of between 30 minutes and 20 hours in a reducing atmosphere and polishing said sintered blank.