Electric resistance element exhibiting voltage nonlinearity characteristic and method of manufacturing the same
US5807510A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 17, 1996 |
| Grant date | Sep 15, 1998 |
| Priority date | — |
| Expiry date | Jul 17, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01C7/112
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A composition for electric material containing as a primary component zinc oxide. The composition further contains at least one of rare-earth elements in a range of 0.01 mol % to 3.0 mol % in terms of oxide thereof given by R.sub.2 O.sub.3 where R represents generally the rare-earth elements, and aluminum in a range of 0.0005 mol % to 0.005 mol % in terms of aluminum oxide given by Al.sub.2 O.sub.3. The composition is suited for manufacturing a resistance element whose varistor voltage can be increased over a whole current range without being accompanied with any appreciable degradation in flatness ratio of a voltage-versus-current characteristic.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.