Silver-based contact material for use in power engineering switchgear
US5429656A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 24, 1993 |
| Grant date | Jul 4, 1995 |
| Priority date | — |
| Expiry date | Nov 24, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H2001/02378
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
In particular for contacts in low-voltage switches, the contact material consists of silver and further active components. In accordance with the invention, there are present as active components, in combination, iron oxide (Fe.sub.2 O.sub.3 /Fe.sub.3 O.sub.4) in a proportion of between 1 and 50% by weight and at least one oxide of a further chemical element in a proportion of between 0.01 and 5% by weight. In particular, contact materials of the constitution AgFe.sub.2 O.sub.3 ReO.sub.2 and AgFe.sub.2 O.sub.3 ZrO.sub.2 have proven suitable in practice. The manufacture of the material and fabricating of the contacts can be effected by methods of powder metallurgy with the inclusion of molding or extrusion technique.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.