Invention Grant
US08405278B2 Multi-layer piezoelectric element, ejection device having the element, and fuel ejection system
有权
多层压电元件,具有元件的喷射装置和燃料喷射系统
- Patent Title: Multi-layer piezoelectric element, ejection device having the element, and fuel ejection system
- Patent Title (中): 多层压电元件,具有元件的喷射装置和燃料喷射系统
-
Application No.: US12740102Application Date: 2008-10-22
-
Publication No.: US08405278B2Publication Date: 2013-03-26
- Inventor: Takeshi Okamura
- Applicant: Takeshi Okamura
- Applicant Address: JP Kyoto
- Assignee: Kyocera Corporation
- Current Assignee: Kyocera Corporation
- Current Assignee Address: JP Kyoto
- Agency: DLA Piper LLP (US)
- Priority: JP2007-280308 20071029
- International Application: PCT/JP2008/069092 WO 20081022
- International Announcement: WO2009/057489 WO 20090507
- Main IPC: H01L41/083
- IPC: H01L41/083

Abstract:
Provided is a multi-layer piezoelectric element in which the amount of the positional displacement can be suppressed even when continuous driving is performed for a long time under high electrical field and high pressure, and which may have a good durability. The laminated piezoelectric element comprises a stacked body in which piezoelectric layers and metal layers are stacked alternately one on another. The metal layers comprise internal electrodes and a low-rigidity metal layer which has rigidity lower than those of the piezoelectric layer and the internal electrode. The low-rigidity metal layer comprises a plurality of metal parts isolated from each other via voids, and a covering layer which covers at least a part of the metal parts.
Public/Granted literature
- US20100294853A1 Multi-Layer Piezoelectric Element, Ejection Device Having the Element, and Fuel Ejection System Public/Granted day:2010-11-25
Information query
IPC分类: