Mechanical versus electromechanical hardening in relaxor ferroelectric Na1/2Bi1/2TiO3-BaTiO3 with ZnO inclusions

Lalitha K.V.*, Jurij Koruza, Jürgen Rödel

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

The stress-strain response of composites constituting relaxor 0.94Na1/2Bi1/2TiO3–0.06BaTiO3 matrix phase with ZnO inclusions is investigated. The ZnO inclusions are found to increase the transformation stress (unpoled) for the relaxor-ferroelectric transformation and the coercive stress (poled) for domain switching. The plastic and remanent strain decreases with increasing volume fraction of the hard ZnO inclusions. This mechanical hardening mechanism is contrasted quantitatively to electromechanical hardening by comparing the transformation stress and coercive stress to the poling field and coercive field respectively, as well as the corresponding plastic strain from mechanical loading to the total strain quantified by electric field loading.

Original languageEnglish
Pages (from-to)92-95
Number of pages4
JournalScripta Materialia
Volume169
DOIs
Publication statusPublished - Aug 2019

Keywords

  • Ferroelasticity
  • Lead-free ferroelectrics
  • Mechanical hardening
  • Mechanical versus electromechanical hardening
  • Piezoelectrics

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys

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