Dielectric ceramic composition and multilayer ceramic capacitor
US7160827B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 28, 2006 |
| Grant date | Jan 9, 2007 |
| Priority date | — |
| Expiry date | Jul 28, 2026 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B2237/704
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A dielectric ceramic composition that includes a main component expressed as 100BamTiO3+xCuO+aROn+bMnO+cMgO (wherein coefficients 100, x, a, b, and c represent molar ratios; m represents the ratio of Ba to Ti (Ba/Ti); R represents at least one metal element selected from Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu; and n represents a positive number required to maintain electroneutrality and is determined by the valence number of R), wherein m, x, a, b, and c meet the following relationships: 0.990≦m≦1.050; 0.1≦x≦5.0; 9.0≦a≦20.0; 0.5≦b≦3.5; and 0<c≦4.0, and the dielectric ceramic composition contains 0.8 to 5.0 parts by weight of a sintering additive with respect to 100 parts by weight of the main component.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.