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

摘要

The invention relates to a method for manufacturing a gray article based on zirconia characterized in that it comprises the successive steps of:a) producing a first mixture comprisinga zirconia powder forming the basic constituent,4 to 15% by weight of at least one stabilizer chosen from the group of oxides comprising yttrium oxide, magnesium oxide and calcium oxide, alone or in combination,0.1% to 1% by weight of a vanadium oxide powder (V 2 O 5);0.1% to 1% by weight of a chromium oxide powder (Cr 2 O 3); and0.1% to 1% by weight of a silicon oxide powder (SiO 2),b) forming a second mixture comprising said first mixture and a binder;c) producing a granulated mixture by granulating said second mixture;d) forming a blank by imparting to said second granulated mixture the shape of the desired article;e) sintering said article for at least thirty minutes at a temperature of between 1250 and 1550 ° C. vs.