Dielectric ceramic composition
US6451721B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 27, 2000 |
| Grant date | Sep 17, 2002 |
| Priority date | — |
| Expiry date | Feb 27, 2021 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B35/47
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A dielectric ceramic composition contains 100% by weight of main component composed of about 35 to 55% by weight of SrTiO3, about 10 to 35% by weight of PbTiO3, about 5 to 12% by weight of CaTiO3, about 8 to 25% by weight of Bi2O3 and about 5 to 13% by weight of TiO2, and about 0.02 to 0.5% by weight of MnO, about 0.05 to 2% by weight of an oxide of at least one element selected from the group consisting of La, Ce, Nd, Pr, Sm, Dy, Er and Y, and about 0.02 to 0.8% by weight of CuO. The dielectric ceramic composition can provide a capacitor which exhibits a low loss and a high dielectric constant, and which can be used in the high frequency region, thereby permitting the advance in miniaturization of the capacitor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.