Multi-layer piezoelectric element, injection apparatus using the same and method of multi-layer piezoelectric element
US8196843B2 · kind B2 · utility
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5References
2Claims
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Key dates
| Filing date | Mar 27, 2007 |
| Grant date | Jun 12, 2012 |
| Priority date | — |
| Expiry date | Jan 1, 2028 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/42
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A multi-layer piezoelectric element having higher durability which experience less decrease in the amount of displacement even when operated continuously over a long period of time under a high pressure and a high voltage is provided. The multi-layer piezoelectric element comprises a plurality of piezoelectric layers and a plurality of internal electrode layers, wherein the piezoelectric layers and the internal electrode layers are stacked alternately one on another, and at least one of the plurality of internal electrode layers contains at least one nitride, titanium nitride or zirconium nitride.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.