LEADLESS PIEZOELECTRIC CERAMIC COMPOSITE AND PIEZOELECTRIC ELEMENT USING IT

Japanese Patent JP2008174424

A

To provide a leadless piezoelectric ceramic composite where two or more kinds of leadless piezoelectric ceramic compositions are compounded and to provide a piezoelectric element using it.

The leadless piezoelectric ceramic composite 100 consists of a porous portion 110 consisting of a first leadless piezoelectric ceramic composition such as an alkali niobate and the like and a second leadless piezoelectric ceramic composition such as an alkali niobate and the like whose composition is different from the first leadless piezoelectric ceramic composition and has a filling portion 120 where pores in the porous portion 110 are filled. It is preferable that the dielectric constant of the first leadless piezoelectric ceramic composition is larger than that of the second leadless piezoelectric ceramic composition. The piezoelectric element 200 has the leadless piezoelectric ceramic composite 100 and at least a pair of electrodes 301, 302 in contact with the leadless piezoelectric ceramic composite 100.

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KAKIMOTO KENICHI
YAMAGIWA KATSUYA
MITSUOKA TAKESHI
OBAYASHI KAZUE

JP2007010385A

July 31, 2008

January 19, 2007

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NAGOYA INST TECHNOLOGY
NGK SPARK PLUG CO

C04B41/85; H01L41/09; H01L41/187; H01L41/22; H01L41/39; H03H9/17

JPH08119771A	1996-05-14
JP2000315827A	2000-11-14
JP2003533596A	2003-11-11
JP2001342065A	2001-12-11
JPH11228227A	1999-08-24
JPH06112543A	1994-04-22
JPS61295678A	1986-12-26
JPH01171287A	1989-07-06

Kiyoshi Kojima
Yoshinobu Hagino
Naoya Taniguchi

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