Electric ceramic composition
US4973567A · kind A · utility
1Cited by
2References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 17, 1989 |
| Grant date | Nov 27, 1990 |
| Priority date | — |
| Expiry date | Nov 17, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B35/495
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A dielectric ceramic composition possessing a high dielectric constant and a high unloaded Q and exhibiting stable electric properties even in the high frequency range of 10 GHz contains BaO, ZnO, MgO, NiO, ZrO.sub.2 and Ta.sub.2 O.sub.5 in amounts of not less than 59.0 mol % and not more than 66.0 mol % of BaO, less than 10 mol % of ZnO, less than 10 mol % of MgO, less than 10 mol % of NiO, less than 10 mol % of ZrO.sub.2, and not less than 19.0 mol % and less than 24 mol % of Ta.sub.2 O.sub.5.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.