In situ measurement of material properties of lead zirconate titanate piezoelectric ceramics during cyclic mechanical loading

Mitsuhiro Okayasu, Eriko Sugiyama, Mamoru Mizuno

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

To better understand the material properties of lead zirconate titanate (PZT) ceramics, in situ mechanical and electrical properties have been investigated continuously during cyclic mechanical loading. The material properties are demonstrated to change as a function of applied maximum stress, with the effective elastic constant increasing with increase of the stress level. The increase of effective elastic constant is attributed to the domain structure of the PZT. 90° domain switching can occur anywhere in the sample, which makes the strain accumulate and leads to high values of the effective elastic constant. The domain switching characteristics are clearly revealed by electron back scattered diffraction analysis. The changes of the electrical properties (electromechanical coupling coefficient, piezoelectric constant and permittivity) are in the opposite sense because of the material strain (or material damage), caused by the change of domain orientation; the electrical properties are degraded with increasing cycle number and applied stress. Based upon the variation of the material properties, details of the damage characteristics in the PZT ceramics are discussed.

Original languageEnglish
Pages (from-to)1445-1452
Number of pages8
JournalJournal of the European Ceramic Society
Volume30
Issue number6
DOIs
Publication statusPublished - Apr 2010
Externally publishedYes

    Fingerprint

Keywords

  • Domain switching
  • Electroplate
  • Fatigue strength
  • Mechanical property
  • PZT ceramic

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry

Cite this