PIEZOELECTRIC CERAMIC COMPOSITION, MULTILAYER PIEZOELECTRIC ELEMENT AND METHOD OF MANUFACTURING THE SAME

Japanese Patent JP2007230839

A

To provide a piezoelectric ceramic composition of which the electric resistance is inhibited from undergoing deterioration caused by oxygen vacancies due to sintering at a low temperature and in a reductive atmosphere.

The multilayer piezoelectric element 1 is provided with a plurality of piezoelectric layers 11 including a composite oxide as a main constituent, and an internal electrode layer 12 formed between the plurality of the piezoelectric layers 11 and containing Cu. The piezoelectric layer 11 comprises a fired body which contains as a main constituent compound oxide expressed by (Pba-bMib) [(Zn1/3Nb2/3)xTiyZrz]O3(wherein 0.96≤a≤1.03, 0≤b≤0.1, 0.05≤x≤0.15, 0.25≤y≤0.5, 0.35≤z≤0.6, and x+y+z=1, and Mi represents at least one selected from among Sr, Ca and Ba) and contains ≤1 wt.% Cu expressed in terms of Cu2O (not inclusive of 0) and ≤0.5 wt.% Ag expressed in terms of Ag2O (not inclusive of 0) to the main constituent.

COPYRIGHT: (C)2007,JPO&INPIT

JP3991564	Piezoelectric composition and piezoelectric element
JP2004075452	DIELECTRIC CERAMIC COMPOSITION AND CERAMIC CAPACITOR
JP3605260	NONREDUCING DIELECTRIC SUBSTANCE CERAMIC COMPOSITION

IEZUMI KUMIKO
TSUKADA GAKUO
YAMAZAKI JUNICHI
SAKAMOTO NORIMASA

JP2006056767A

September 13, 2007

March 02, 2006

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TDK CORP

C04B35/49; C04B35/493; H01L41/083; H01L41/187; H01L41/22; H01L41/273; H01L41/39; H03H3/02; H03H9/17

JP2004137106A	2004-05-13
JP2003238248A	2003-08-27
JPH10316467A	1998-12-02
JPS62254305A	1987-11-06
JP2003529917A	2003-10-07
JP3969594B2	2007-09-05
JP3923064B2	2007-05-30

Mitsuru Oba
Horikawa Miyuki

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