Dielectric ceramic composition and laminated ceramic capacitor using the same
US6243254A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 6, 1999 |
| Grant date | Jun 5, 2001 |
| Priority date | — |
| Expiry date | Aug 6, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01G4/1227
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Provided is a highly reliable laminated ceramic capacitor in which decrease of dielectric constant under a high electric field is small and which satisfies the B-grade and X7R grade characteristics, using Ni for the inner electrodes, wherein the dielectric material contains about 0.2 to 5.0 parts by weight of Li.sub.2 O--(Si, Ti).sub.2 --MO oxides (MO is at least one of the compounds of Al.sub.2 O.sub.3 and ZrO.sub.2) or SiO.sub.2 --TiO.sub.2 --XO oxides (XO is at least one of the compounds of BaO, CaO, SrO, MgO, ZnO and MnO) relative to 100 parts by weight of a principal component represented by (Ba.sub.1-x Ca.sub.x O).sub.m TiO.sub.2 +.alpha.Re.sub.2 O.sub.3 +.beta.MgO+.gamma.MnO (Re.sub.2 O.sub.3 represents at least one of Y.sub.2 O.sub.3, Gd.sub.2 O.sub.3, Tb.sub.2 O.sub.3, Dy.sub.2 O.sub.3, Ho.sub.2 O.sub.3, Er.sub.2 O.sub.3 and Yb.sub.2 O.sub.3).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.