Monolithic piezoelectric element

Details Monolithic piezoelectric element Monolithic piezoelectric element

2009-06-04

2010-10-05

SanMartin, J. (Department: 2837)

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

C310S363000, C310S364000, C310S365000

Reexamination Certificate

active

07808155

ABSTRACT:
A monolithic piezoelectric element includes an element assembly in which internal electrode layers and piezoelectric ceramic layers are laminated alternately. The internal electrode layers contain an Ag—Pd alloy, which has an Ag content of 85 percent by weight or more as a primary component, a metal element having a valence of at least one of pentavalence or hexavalence. The piezoelectric ceramic layers contain a composite oxide represented by Pb(Ti,Zr)O3as a primary component, a part of Ag contained in the internal electrode layers is almost uniformly diffused therein and, the metal element is diffused in the form of a metal oxide in such a way that the concentration is reduced with decreasing proximity to the internal electrode layers. In this manner, a monolithic piezoelectric element having a desired large piezoelectric constant can be obtained without inviting an increase in cost even when a firing treatment is conducted at low temperatures.

REFERENCES:
patent: 5935485 (1999-08-01), Tani et al.
patent: 5958285 (1999-09-01), Kawano et al.
patent: 7332851 (2008-02-01), Nanataki et al.
patent: 7344654 (2008-03-01), Ogiso et al.
patent: 7431785 (2008-10-01), Horikawa et al.
patent: 7595006 (2009-09-01), Yamamoto et al.
patent: 7598660 (2009-10-01), Kobayashi et al.
patent: 7605522 (2009-10-01), Yamamoto et al.
patent: 7667377 (2010-02-01), Yamamoto et al.
patent: 2002/0098333 (2002-07-01), Feltz et al.
patent: 2007/0125977 (2007-06-01), Kawamoto et al.
patent: 2007/0228894 (2007-10-01), Ishikura et al.
patent: 2008/0095927 (2008-04-01), Nanataki et al.
patent: 2009/0015109 (2009-01-01), Schuh
patent: 2010/0102138 (2010-04-01), Denzler et al.
patent: 2010/0107390 (2010-05-01), Yamamoto et al.
patent: 8-288607 (1996-11-01), None
patent: 2002299710 (2002-10-01), None
patent: 2004-111895 (2004-04-01), None
patent: 2005-285883 (2005-10-01), None
patent: WO 2005/071769 (2005-08-01), None
PCT/JP2007/070991 International Search Report dated Aug. 11, 2007.
PCT/JP2007/070991 Written Opinion dated Aug. 11, 2007.

Affiliated with

Also associated with

Rating

Monolithic piezoelectric element does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Monolithic piezoelectric element, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Monolithic piezoelectric element will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4205948