Sintered body for varistor, multilayer substrate using same, and production method for these
US9741477B2 · kind B2 · utility
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13Claims
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Key dates
| Filing date | Dec 5, 2014 |
| Grant date | Aug 22, 2017 |
| Priority date | — |
| Expiry date | Dec 5, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05K2201/0738
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
To provide a zinc oxide-based varistor that exhibits adequate characteristics without using antimony. Disclosed is a sintered body for a varistor, including zinc oxide as a main component; 0.6 to 3.0 mol % of bismuth oxide in terms of bismuth (Bi); 0.2 to 1.4 mol % of cobalt oxide in terms of cobalt (Co); 0.1 to 1.5 mol % of chrome oxide in terms of chrome (Cr); and 0.1 to 1.5 mol % of manganese oxide in terms of manganese (Mn), wherein the contents of antimony (Sb), a rare earth element and tin (Sn) are not more than a level of impurities.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.