Piezoelectric material, piezoelectric element, and electronic equipment
US11509244B2 · kind B2 · utility
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5References
18Claims
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Key dates
| Filing date | Jan 29, 2020 |
| Grant date | Nov 22, 2022 |
| Priority date | — |
| Expiry date | Mar 7, 2041 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B2235/768
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A lead-free piezoelectric material includes perovskite-type metal oxide containing Na, Nb, Ba, Ti, and Mg and indicates excellent piezoelectric properties. The piezoelectric material satisfies the following relational expression (1): 0.430≤a≤0.460, 0.433≤b≤0.479, 0.040≤c≤0.070, 0.0125≤d≤0.0650, 0.0015≤e≤0.0092, 0.9×3e≤c−d≤1.1×3e, a+b+c+d+e=1, where a, b, c, d, and e denote the relative numbers of Na, Nb, Ba, Ti, and Mg atoms, respectively.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.