Title:
PIEZOELECTRIC ELEMENT, ULTRASONIC TRANSDUCER AND ULTRASONIC MOTOR HAVING THE SAME
Document Type and Number:
Japanese Patent JP2023060517
Kind Code:
A
Abstract:
To provide a piezoelectric element with small mechanical loss and large displacement when driven at high speed and large amplitude.SOLUTION: A piezoelectric element consists of first and second electrodes provided opposite each other, and a piezoelectric ceramics disposed between the first electrode and the second electrode and in contact therewith, mainly composed of a compound having a perovskite-type structure containing Pb, Zr, Ti and O as constituent elements, wherein the average domain width in the sintered particles 11 observed in the cross section perpendicular to the first and second electrodes is between 100 nm and 500 nm and the area percentage of sintered particles with observed domain 12 in the cross section is 60% or more.SELECTED DRAWING: Figure 4
Inventors:
AIZAWA TOMOYA
Application Number:
JP2021170160A
Publication Date:
April 28, 2023
Filing Date:
October 18, 2021
Export Citation:
Assignee:
TAIYO YUDEN KK
International Classes:
H10N30/853; C04B35/493; H10N30/20; H10N30/50
Attorney, Agent or Firm:
Satoru Aida
Satoru Matsumoto
Yasuko Eto
Masaki Okui
Junko Yoshimizu
Satoru Matsumoto
Yasuko Eto
Masaki Okui
Junko Yoshimizu