Optically black cobalt surface
US4904353A · kind A · utility
2Cited by
6References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 31, 1988 |
| Grant date | Feb 27, 1990 |
| Priority date | — |
| Expiry date | Aug 31, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S126/908
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
The present invention resides in the discovery that an optically black electroplated cobalt/cobalt oxide surface which has been anodized and then preferably calcined has both a high emissivity and high absorptivity, and is stable against loss of absorptivity at temperatures of more than 450.degree. C. for prolonged periods. Preferably, the optically black cobalt oxide surfaces of the present invention have an absorptivity of at least about 0.96 and an emissivity of at least about 0.6.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.