Patent ID: 6368468
Filing Date: 2002-04-09
Classification: C04B,G04B,Y10T

Abstract:
A method for obtaining a finished or semi-finished zirconia based ceramic article having a core of ZrO2 and/or partially reduced ZrO2, the article having a gold metallic external appearance, wherein it includes the following steps of:providing at least one zirconia article previously shaped into its finished or semi-finished shape; placing said article in a reaction vessel in which a plasma is generated from a gaseous mixture of ammonia and an inert gas, or a mixture of nitrogen, hydrogen and an inert gas, or a combination of such two mixtures; and maintaining said article in the plasma for a period of time of approximately 15 to 240 minutes, the average temperature of the article being settled in these conditions between 600 and 1,300Â° C.