Dielectric ceramic composition and dielectric resonator
US5219809A · kind A · utility
5Cited by
7References
7Claims
0Family size
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Key dates
| Filing date | Jul 2, 1991 |
| Grant date | Jun 15, 1993 |
| Priority date | — |
| Expiry date | Jul 2, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01G4/12
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A dielectric ceramic composition possessing a high relative dielectric constant, a high unloaded Q, and an excellent temperature characteristic is expressed as xPbO-yZrO.sub.2 -zCaO, in the relation of x+y+z=1, wherein x, y, z are in mol percentage ranges of 0.125.ltoreq.x.ltoreq.0.49, 0.4.ltoreq.y.ltoreq.0.6, 0.11 .ltoreq.z.ltoreq.0.275. A part of ZrO.sub.2 of the composition formula may be replaced by (B1B2)0.sub.2 (where B1 is Mg, Ca, Zn, Co, Ni, Mn, Cu, Al, Ga, or Y, and B2 is Nb, Ta, or W), or Sn.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.