Method for obtaining a zirconia-based article having a gold metallic appearance
US6355202B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 8, 2001 |
| Grant date | Mar 12, 2002 |
| Priority date | — |
| Expiry date | May 8, 2021 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA44C5/00
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method for obtaining a finished or semi-finished zirconia-based article having a gold metallic external appearance, the method including the steps of: providing at least one zirconia article previously shaped into its finished or semi-finished shape; partially reducing the zirconia forming said article; placing said article in a reaction vessel in which a plasma is generated from ammonia, or a mixture of nitrogen and hydrogen, or a combination of this gas and this mixture; and maintaining the article in the plasma for a period of at least 5 minutes, while adjusting the conditions so that the average temperature of the article is settled between 500 and 900° C.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.