Manufacturing method for a colored zirconia based article in particular an orange/red article and a colored zirconia based decorative article obtained in accordance with such method

摘要

The invention concerns a manufacturing method for an orange/red zirconia article characterised in that it includes the following steps:;forming a mixture including a zirconia powder, 3 to 20% in weight of a stabilising agent, 0.1% to 5% in weight of powders for forming a vitreous phase, including SiO₂, Al₂O₃ and Y₂O₃, 0.01% to 10% in weight of a copper oxide powder (CuO);;forming a second mixture including said first mixture and a binding agent;;forming a green body of the article from said second mixture;;sintering for at least thirty minutes at a temperature comprised between 1,350 and 1,500° C. in ambiant atmosphere, and;annealing the desired article at a temperature comprised between 700° C. and 1,350° C. for a period of time comprised between 30 minutes and 20 hours in an inert or reducing atmosphere having an oxygen partial pressure comprised between 10^−10 and 1 atmosphere, and;polishing said sintered article.