Piezoelectric ceramic, method for producing piezoelectric ceramic, and piezoelectric ceramic electronic component
US10193054B2 · kind B2 · utility
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Key dates
| Filing date | Nov 11, 2015 |
| Grant date | Jan 29, 2019 |
| Priority date | — |
| Expiry date | Feb 12, 2037 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B2235/768
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A piezoelectric ceramic that contains an alkali niobate compound as its main ingredient. The alkali niobate compound has a perovskite crystal structure represented by AmBO3 and contains an alkali metal. There exists Sn in part of site A, and Zr in part of site B. A radial distribution function obtained from a K-edge X-ray absorption spectrum of Sn has a first peak intensity P1 at a first distance from a Sn atom and a second peak intensity P2 at a second distance from the Sn atom. The second distance is greater than the first distance, and the peak intensity ratio P1/P2 is 2.7 or less.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.