Piezoelectric composition and piezoelectric device
US10964878B2 · kind B2 · utility
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3References
5Claims
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Key dates
| Filing date | Mar 7, 2018 |
| Grant date | Mar 30, 2021 |
| Priority date | — |
| Expiry date | Jul 15, 2039 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B2235/85
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A piezoelectric composition comprises a plurality of crystal particles, wherein the piezoelectric composition includes bismuth, iron, barium, titanium, and oxygen; the crystal particle include a core and a shell having a contents of bismuth higher than that in the core and covering the core; and the total area of the cross sections of the cores exposed to the cross section of the piezoelectric composition is expressed as SCORE, the total area of the cross sections of the shells exposed to the cross section of the piezoelectric composition is expressed as SSHELL, and 100·SCORE/(SCORE+SSHELL) is 50 to 90.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.