Depolarization field effect on elasticity of unpoled piezoelectric ceramics

Multiple poling steps and complex electrode configurations are indispensable for high-performance state-of-the-art piezoelectric devices, yet those create partially poled or utterly unpoled regions that significantly change behaviors of piezoelectric devices. Several studies have dealt with method to obtain elastic compliance, yet little attention has been paid to method to obtain elastic loss. Furthermore, physical mechanism to explain the behavior of unpoled piezoelectric ceramic is missing. In this study, we experimentally obtain both effective elastic compliance and elastic loss of unpoled piezoelectric ceramics, using recently developed method called partial electrode (PE), and propose physical mechanism to explain the elasticity. The derivation process for analytical admittance equation for PE is explained and verified with finite element analysis (FEA) simulation. The complex elastic compliance was determined by fitting experimental admittance curve with derived analytical solutions. With the aid of intensive and extensive elastic compliances and elastic losses, we concluded that elasticity of unpoled piezoelectric material lies in between intensive-ness and extensive-ness. We explained this “elastic intermediacy” with depolarization field effect, which is one of the most important phenomena in piezoelectricity.

Files

Metadata

Work Title Depolarization field effect on elasticity of unpoled piezoelectric ceramics
Access
Open Access
Creators
  1. Yoonsang Park
  2. Hossein Daneshpajooh
  3. Timo Scholehwar
  4. Eberhard Hennig
  5. Kenji Uchino
Keyword
  1. Piezoelectric devices
  2. Piezoelectric composite
  3. Depolarization field
  4. Elasticity
  5. Internal friction
License In Copyright (Rights Reserved)
Work Type Article
Publisher
  1. Applied Materials Today
Publication Date June 1, 2021
Publisher Identifier (DOI)
  1. https://doi.org/10.1016/j.apmt.2021.101020
Deposited February 17, 2023

Versions

Analytics

Collections

This resource is currently not in any collection.

Work History

Version 1
published

  • Created
  • Added 21-DepolarizationFeildUnpoledPiezoCeramic-Park-ApplMatToday-2021.pdf
  • Added Creator Yoonsang Park
  • Added Creator Hossein Daneshpajooh
  • Added Creator Timo Scholehwar
  • Added Creator Eberhard Hennig
  • Added Creator Kenji Uchino
  • Published
  • Updated Keyword Show Changes
    Keyword
    • Piezoelectric devices, Piezoelectric composite, Depolarization field, Elasticity, Internal friction