Piezoelectric ceramic, vibrator and ultrasonic motor
US7944126B2 · kind B2 · utility
12Cited by
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Key dates
| Filing date | Oct 19, 2009 |
| Grant date | May 17, 2011 |
| Priority date | — |
| Expiry date | Oct 19, 2029 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B2235/5445
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Provided is a piezoelectric ceramic 1 containing a compound represented by the following general formula (1), as a main component and at least one element selected from Mn, Fe and Cu in an amount of 0.04 to 0.6% by mass based on the main component, and a vibrator 10 having the piezoelectric ceramic 1 and electrodes 2, 3. CaxBa1−xTiO3 (1)where, x satisfies 0.05≦x≦0.20.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.