Title:
LEAD-FREE PIEZOELECTRIC CERAMIC COMPOSITION, METHOD FOR PRODUCING SAME, PIEZOELECTRIC ELEMENT USING LEAD-FREE PIEZOELECTRIC CERAMIC COMPOSITION, ULTRASONIC PROCESSING MACHINE, ULTRASONIC DRIVE DEVICE, AND SENSING DEVICE
Document Type and Number:
WIPO Patent Application WO/2013/008418
Kind Code:
A1
Abstract:
This lead-free piezoelectric ceramic composition is mainly composed of a first crystal phase (KNN phase) and a second crystal phase (NTK phase). The first crystal phase (KNN phase) is composed of a plurality of crystal grains that are formed of an alkali niobate/tantalate perovskite oxide having piezoelectric characteristics, said crystal grains being bonded with each other in a deposited state. The second crystal phase (NTK phase) is composed of a compound that contains titanium (Ti), and the spaces between the crystal grains in the first crystal phase are filled with the second crystal phase (NTK phase).
Inventors:
YAMAZAKI MASATO (JP)
MATSUOKA TAKAYUKI (JP)
KITAMURA KAZUAKI (JP)
YAMADA HIDETO (JP)
KURAHASHI TOSHIAKI (JP)
YAMAGIWA KATSUYA (JP)
OHBAYASHI KAZUSHIGE (JP)
MATSUOKA TAKAYUKI (JP)
KITAMURA KAZUAKI (JP)
YAMADA HIDETO (JP)
KURAHASHI TOSHIAKI (JP)
YAMAGIWA KATSUYA (JP)
OHBAYASHI KAZUSHIGE (JP)
Application Number:
PCT/JP2012/004329
Publication Date:
January 17, 2013
Filing Date:
July 04, 2012
Export Citation:
Assignee:
NGK SPARK PLUG CO (JP)
YAMAZAKI MASATO (JP)
MATSUOKA TAKAYUKI (JP)
KITAMURA KAZUAKI (JP)
YAMADA HIDETO (JP)
KURAHASHI TOSHIAKI (JP)
YAMAGIWA KATSUYA (JP)
OHBAYASHI KAZUSHIGE (JP)
YAMAZAKI MASATO (JP)
MATSUOKA TAKAYUKI (JP)
KITAMURA KAZUAKI (JP)
YAMADA HIDETO (JP)
KURAHASHI TOSHIAKI (JP)
YAMAGIWA KATSUYA (JP)
OHBAYASHI KAZUSHIGE (JP)
International Classes:
C04B35/00; G01L23/22; H01L41/08; H01L41/09; H01L41/187; H01L41/22; H03H9/17; H04R17/00
Domestic Patent References:
| WO2011093021A1 | 2011-08-04 |
Foreign References:
| JP2008174424A | 2008-07-31 | |||
| JP2004002051A | 2004-01-08 | |||
| JP2001240471A | 2001-09-04 | |||
| JP2000313664A | 2000-11-14 | |||
| JP2003342069A | 2003-12-03 |
Other References:
SEO IN-TAE: "Effect of CuO on the Sintering and Piezoelectric Properties of 0 . 95 (Nao.5Ko.5) Nb03-0.05SrTi03 Lead-Free Piezoelectric Ceramics", J. AM. CERAM. SOC., vol. 91, no. 12, 26 January 2009 (2009-01-26), pages 3955 - 3960, XP055140760
H. REBBAH ET AL., JOURNAL OF SOLID STATE CHEMISTRY, vol. 31, 1980, pages 321 - 328
See also references of EP 2733131A4
H. REBBAH ET AL., JOURNAL OF SOLID STATE CHEMISTRY, vol. 31, 1980, pages 321 - 328
See also references of EP 2733131A4
Attorney, Agent or Firm:
TOKKYO GYOMUHOJIN MEISEI INTERNATIONAL PATENT FIRM (JP)
Patent business corporation Akinari international patent firm (JP)
Patent business corporation Akinari international patent firm (JP)
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Claims: