Title:
CERAMIC SINTERED BODY, METHOD FOR PRODUCING CERAMIC SINTERED BODY, AND PIEZOELECTRIC CERAMIC ELECTRONIC ELEMENT
Document Type and Number:
WIPO Patent Application WO/2016/006580
Kind Code:
A1
Abstract:
In the present invention, a piezoelectric ceramic is formed using a perovskite-type compound such as PZT as the primary ingredient. The present invention contains at least 0.6 wt% of Nb and/or Sb, and at least 0.05 wt% of Ce, Tb, Dy, Ho, and/or Er. Preferably, at least 0.29 wt% of Ni, Fe, Co, Mn, Mg, and/or Zn is contained. The crystal axis of the crystal grains has a {100} orientation, and has orientation properties of which the degree of orientation resulting from a Lotgering method under the imposition of a 3T magnetic field is at least 0.5. A ceramic element (1) is formed using the piezoelectric ceramic. As a result, achieved are a piezoelectric ceramic having sufficient crystal orientation properties even under the imposition of a weak magnetic field, and a method for producing the piezoelectric ceramic. By means of using the piezoelectric ceramic, a piezoelectric ceramic electronic element is achieved that obtains a more favorable electromechanical coupling coefficient.
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Inventors:
MIWA YASUNARI (JP)
KAWADA SHINICHIRO (JP)
KAWADA SHINICHIRO (JP)
Application Number:
PCT/JP2015/069445
Publication Date:
January 14, 2016
Filing Date:
July 06, 2015
Export Citation:
Assignee:
MURATA MANUFACTURING CO (JP)
International Classes:
C04B35/491; B28B1/00; H01L41/083; H01L41/09; H01L41/187
Domestic Patent References:
| WO2013088927A1 | 2013-06-20 |
Foreign References:
| JP2005100660A | 2005-04-14 | |||
| JP2012009678A | 2012-01-12 | |||
| JP2008037064A | 2008-02-21 |
Attorney, Agent or Firm:
KUNIHIRO YASUTOSHI (JP)
Kunihiro Yasutoshi (JP)
Kunihiro Yasutoshi (JP)
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