Dielectric ceramic and ceramic electronic component
US6946418B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 2, 2003 |
| Grant date | Sep 20, 2005 |
| Priority date | — |
| Expiry date | Jan 4, 2024 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/24926
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A dielectric ceramic contains a primary constituent represented by general formula (1): a[(SrbCa1−b)TiO3]−(1−a)[Bi2O3.nTiO2] (wherein a and b indicate molar amounts, and n indicates a molar ratio of TiO2 to Bi2O3), and a secondary constituent represented by general formula (2): xMgTiO3+yMnOm+zLn2O3 (wherein x, y, and z indicate weight per 100 parts by weight of the primary constituent, m is 1 to 2, and Ln is at least one of La, Ce, Pr, Nd, Sm, Eu, Gd, Dy, Ho, and Er), wherein a, b, n, x, y, and z satisfy the expressions 0.88≦a≦0.92, 0.30≦b≦0.50, 1.8≦n≦3.0, 1.0≦x≦3.0, 0.1≦y≦2.0, and 0<z≦3.0. A ceramic electronic component including the dielectric ceramic is also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.