Piezoelectric ceramic composition, piezoelectric element, and resonator
US8212457B2 · kind B2 · utility
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Key dates
| Filing date | Mar 21, 2011 |
| Grant date | Jul 3, 2012 |
| Priority date | — |
| Expiry date | Mar 21, 2031 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B2235/3262
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Provided is a piezoelectric ceramic composition which can increase Qmax of a resonator and inhibit the resonator from changing its oscillation frequency F0 under a low temperature environment. The piezoelectric ceramic composition has a structure represented by the following general formula (1):(PbαLnβMeγ)(Ti1−(x+y+z)ZrxMnyNbz)O3 (1)where Ln is a lanthanoid element, Me is an alkaline-earth metal element, α>0, β>0, γ≧0, 0.965≦α+β+γ≦1.000, 0.158≦x≦0.210, y≧0, z≧0, and 1−(x+y+z)>0.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.