Title:
PIEZOELECTRIC ELEMENT, METHOD FOR PRODUCING SAME AND PIEZOELECTRIC VIBRATION DEVICE
Document Type and Number:
WIPO Patent Application WO/2022/097393
Kind Code:
A1
Abstract:
A piezoelectric element according to one aspect of the present invention is provided with: a piezoelectric ceramic which is mainly composed of a perovskite compound that is represented by composition formula LixNayK1-x-yNbO8 (wherein 0.02 < x ≤ 0.1 and 0.02 < x + y ≤ 1), while containing silver and at least one alkaline earth metal that is selected from among calcium, strontium and barium, and which contains LiNbO3 in the surface but does not contain LiNbO3 in a portion where the depth from the surface is 5 μm or more; and at least a pair of electrodes which are formed on the surface of the piezoelectric ceramic.
Inventors:
ITO RYO (JP)
GOTO TAKAYUKI (JP)
GOTO TAKAYUKI (JP)
Application Number:
PCT/JP2021/035783
Publication Date:
May 12, 2022
Filing Date:
September 29, 2021
Export Citation:
Assignee:
TAIYO YUDEN KK (JP)
International Classes:
H01L41/187; C04B35/495; H01L41/047; H01L41/083; H01L41/09; H01L41/113; H01L41/257; H01L41/43
Domestic Patent References:
| WO2012086449A1 | 2012-06-28 |
Foreign References:
| JP2017163055A | 2017-09-14 | |||
| JP2020147466A | 2020-09-17 | |||
| JP2009010367A | 2009-01-15 | |||
| JP2013189325A | 2013-09-26 |
Attorney, Agent or Firm:
AIDA Satoru (JP)
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