Microwave dielectric ceramic composition
US5489559A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 23, 1994 |
| Grant date | Feb 6, 1996 |
| Priority date | — |
| Expiry date | Dec 23, 2014 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B35/495
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The present invention provides a microwave dielectric ceramic composition in which .epsilon.r, Qu and .tau.f are generally controlled within a practical characteristic range and each of the characteristics is maintained in a well balanced state. A ceramic composition of the present invention comprises a composition represented by xBi.sub.2 O.sub.3 -(1-x) (yNb.sub.2 O.sub.5 -(1-y)Ta.sub.2 O.sub.5) in which 0.45.ltoreq.x.ltoreq.0.55 and 0.1.ltoreq.y<1.0 as a main ingredient, to which not more than 0.8 parts by weight of V.sub.2 O.sub.5 is added and incorporated. An another ceramic composition comprises a composition represented by Bi(NbxTa1-x)O.sub.4 in which 0<x.ltoreq.0.96 as a main ingredient, to which not more than 5 wt % of V.sub.2 O.sub.5 and not more than 2 wt % of PbO are added and incorporated. An another ceramic composition comprises the main ingredient as described above to which not more than 5 wt % of V.sub.2 O.sub.5 and not more than 2 wt % of MnO.sub.2 are added and incorporated. An another ceramic composition comprises the main ingredient as described above to which not more than 2 wt % of V.sub.2 O.sub.5 and not more than 1 wt % of TiO.sub.2 are added and incorporate…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.