Title:
PIEZOELECTRIC CERAMIC, PIEZOELECTRIC ELEMENT, AND ULTRASONIC VIBRATOR
Document Type and Number:
WIPO Patent Application WO/2022/153681
Kind Code:
A1
Abstract:
A piezoelectric ceramic according to one aspect of the present invention contains Pb, Zr, Ti, Zn, Nb, Mn, and O as constituent elements and includes a compound having a Perovskite structure as a main component. The average particle size ravg of included particles is 4 μm or less, and the ratio ((IZT + IZnO) / IP × 100) of the total of the maximum peak intensity IZT appearing at 34.0º ≤ 2θ ≤ 35.0º and the maximum peak intensity IZnO appearing at 35.5º ≤ 2θ ≤ 37.0º to the maximum peak intensity IP appearing at 20.0º ≤ 2θ ≤ 40.0º in X-ray diffraction measurement using a Cu-Kα ray is 1.0% or less.
Inventors:
AIZAWA TOMOYA (JP)
HARADA TOMOHIRO (JP)
HARADA TOMOHIRO (JP)
Application Number:
PCT/JP2021/043158
Publication Date:
July 21, 2022
Filing Date:
November 25, 2021
Export Citation:
Assignee:
TAIYO YUDEN KK (JP)
International Classes:
H01L41/047; C04B35/491; H01L41/083; H01L41/09; H01L41/187; H01L41/339
Domestic Patent References:
| WO2019026941A1 | 2019-02-07 |
Foreign References:
| JP2001253773A | 2001-09-18 | |||
| JP2020145286A | 2020-09-10 | |||
| JPH11349380A | 1999-12-21 |
Attorney, Agent or Firm:
AIDA Satoru (JP)
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