Dielectric ceramic compositions
US6613707B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 23, 2001 |
| Grant date | Sep 2, 2003 |
| Priority date | — |
| Expiry date | Jan 23, 2022 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B35/465
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The present invention discloses a dielectric ceramic composition having a formula represented by (1−x)Nd(Ga1−yAly)O3-xCaTiO3, wherein x refers a mole fraction of CaTiO3 to the composition and satisfies an expression of 0.5≦x≦0.8, and y refers a mole fraction of Al to Ga and satisfies an expression of 0≦y≦0.9. The present dielectric substance has a high dielectric constant and a high Q value and a resonant frequency temperature coefficient of near 0. Also, it can be sintered at a low temperature and thus replace the conventional dielectric materials used as a filter for parts of mobile communication or satellite communication appliances.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.