Dielectric ceramic and capacitor
US8107221B2 · kind B2 · utility
1Cited by
9References
14Claims
0Family size
Assignee
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Key dates
| Filing date | Oct 26, 2007 |
| Grant date | Jan 31, 2012 |
| Priority date | — |
| Expiry date | Nov 8, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01G4/30
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A dielectric ceramic includes crystal grains containing barium titanate as a main component, magnesium, a rare-earth element, and manganese, wherein the crystal grains have a cubic crystal structure; and the dielectric ceramic contains, per mole of barium, 0.033 to 0.085 mol of magnesium in terms of MgO, 0.1 to 0.2 mol of the rare-earth element (RE) in terms of RE2O3, and 0.006 to 0.018 mol of manganese in terms of MnO. Such a dielectric ceramic has a high relative dielectric constant, stable temperature characteristic of the relative dielectric constant, and no spontaneous polarization.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.