Dielectric ceramic compositions
US5824616A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 22, 1996 |
| Grant date | Oct 20, 1998 |
| Priority date | — |
| Expiry date | Feb 22, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01P7/10
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The invention provides a dielectric ceramic composition represented by Formula 1: EQU (1-x)Re.sub.1+a (A.sub.2/3 Nb.sub.1/3)O.sub.3+1.5a -xB.sub.1+b TiO.sub.3+bFormula 1 wherein Re represents a component comprising a rare earth element, A represents a component comprising at least one element selected from the group consisting of Mg and Zn, B represents a component comprising Ca, x represents a number in the range of 0.40 to 0.80, a represents a number in the range of 0 to 0.15, and b represents a number in the range of 0 to 0.08. The composition has a high relative permittivity, a Q value and a small resonant frequency temperature coefficient. The composition is useful in miniaturizing dielectric resonators.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.