Hard piezoelectric ceramic composition for multilayer piezoelectric transformers
US11812665B1 · kind B1 · utility
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21Claims
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Key dates
| Filing date | May 3, 2019 |
| Grant date | Nov 7, 2023 |
| Priority date | — |
| Expiry date | Jul 10, 2042 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B2235/77
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A composition includes at least one Pb/Ni/Nb - Pb/Mg/W - Pb/Zr/Ti mixed oxide. A piezoelectric device may be made by providing at least two layers comprising the composition and coated with an outer electrode material; providing a plurality of layers comprising the composition and coated with an inner electrode material; combining or stacking a plurality of layers coated with inner electrode materials between two outer electrodes; and sintering or co-firing the inner electrode materials and outer electrode materials at a temperature at or below about 1000° C.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.