Title:
PIEZOELECTRIC COMPOSITION, PIEZOELECTRIC ELEMENT, PIEZOELECTRIC DEVICE, PIEZOELECTRIC TRANSFORMER, ULTRASONIC MOTOR, ULTRASONIC WAVE-GENERATING ELEMENT, AND FILTER ELEMENT
Document Type and Number:
WIPO Patent Application WO/2020/166562
Kind Code:
A1
Abstract:
This piezoelectric composition contains: at least one element selected from the alkali metal elements; at least one element selected from the group consisting of palladium, niobium, and tantalum; copper or copper and germanium; and oxygen. The piezoelectric composition has a main phase and a high-Cu-concentration phase in which the percentage of copper contained is higher than in the main phase, and when the percentage of oxygen contained in the high-Cu-concentration phase is designated as Og and the percentage of copper contained is designated as Cug, Og and Cug satisfy the relationships 51 ≤ Og ≤ 60 and 2.0 ≤ Cug≤ 15.
Inventors:
KATOH HIROKI (JP)
AKIYAMA YUMI (JP)
AKIYAMA YUMI (JP)
Application Number:
PCT/JP2020/005142
Publication Date:
August 20, 2020
Filing Date:
February 10, 2020
Export Citation:
Assignee:
TDK CORP (JP)
International Classes:
B06B1/06; C01G33/00; C01G35/00; H01L41/083; H01L41/09; H01L41/113; H01L41/187; H03H9/17; H04R17/00
Domestic Patent References:
| WO2018180770A1 | 2018-10-04 | |||
| WO2013008418A1 | 2013-01-17 |
Foreign References:
| JP2000313664A | 2000-11-14 |
Attorney, Agent or Firm:
MAEDA & SUZUKI (JP)
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