Piezoelectric material, piezoelectric element, and electronic equipment
US11489462B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Jan 29, 2020 |
| Grant date | Nov 1, 2022 |
| Priority date | — |
| Expiry date | May 12, 2041 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B2235/96
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Provided is a lead-free piezoelectric material reduced in dielectric loss tangent, and achieving both a large piezoelectric constant and a large mechanical quality factor. A piezoelectric material according to at least one embodiment of the present disclosure is a piezoelectric material including a main component formed of a perovskite-type metal oxide represented by the general formula (1): Nax+s(1−y)(BiwBa1−s−w)1−yNbyTi1−yO3 (where 0.84≤x≤0.92, 0.84≤y≤0.92, 0.002≤(w+s)(1−y)≤0.035, and 0.9≤w/s≤1.1), and a Mn component, wherein the content of the Mn is 0.01 mol % or more and 1.00 mol % or less with respect to the perovskite-type metal oxide.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.