Dielectric ceramic composition and ceramic electronic device
US9688582B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 8, 2016 |
| Grant date | Jun 27, 2017 |
| Priority date | — |
| Expiry date | Mar 8, 2036 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B2237/68
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A dielectric ceramic composition and a ceramic electric device having a dielectric layer composed of the dielectric ceramic composition including a main component having a perovskite crystal structure expressed by general formula ABO3, an oxide of Eu, an oxide of Ra (Sc, Er, Tm, Yb and Lu), an oxide of Rb (Y, Dy, Ho, Tb and Gd) and an oxide of Si, in which 0.075≦α≦0.5, 0.5≦β≦3, 1.0≦γ≦4, 1.5≦δ≦5, and 0.030≦α/δ≦0.250 where a content of an oxide of Eu is α mole, a content of the oxide of Ra is β mole, a content of the oxide of Rb is γ mole, and a content of the second sub-component is δ mole with respect to 100 moles of the main component.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.