Large electromechanical strain response in BiFeO3–BaTiO3-based ceramics at elevated temperature

  • Salman Ali Khan
  • , Tauseef Ahmed
  • , Muhammad Habib
  • , Fazli Akram
  • , Jihee Bae
  • , Tae Kwon Song
  • , Dong Hwan Lim
  • , Soon Jong Jeong
  • , Myong Ho Kim*
  • , Soonil Lee*
  • *Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

23 Scopus citations

Abstract

An approach of composition modification in (Bi,Na,Ba,Sr)(Ti,Nb,Zr)O3 (BNSTNZ)–modified 0.65Bi1.05FeO3–0.35BaTiO3 (BF35BT) piezoelectric materials was investigated. Introducing BNSTNZ into BF35BT ceramics led from the normal-ferroelectric to relaxor-ferroelectric- phase. At the optimum composition, large dynamic piezoelectric coefficient (d33*) of 583 pm/V under the applied field of 5 kV/mm and relatively high static piezoelectric coefficient (d33) of 135 pC/N with high maximum temperature (Tm ≤ 400 °C) were obtained. The unipolar strain and d33* of BNSTNZ into BF35BT ceramics with x = 0.005 increased up to 0.251% and 718 pm/V at 90 °C. The remarkably enhanced field-induced strain response of BF35BT-based compositions is believed to be attributed to the optimum grain size, high tetragonality and the ferroelectric-relaxor phase coexistence. It is noted that this composition can be a favorable lead-free candidate for high-temperature piezoelectric applications.

Original languageEnglish
Article number110133
JournalJournal of Physics and Chemistry of Solids
Volume156
DOIs
StatePublished - Sep 2021
Externally publishedYes

Bibliographical note

Publisher Copyright:
© 2021 Elsevier Ltd

Keywords

  • Electromechanical
  • Ferroelectric
  • Lead-free
  • Piezoelectric
  • Temperature dependence

ASJC Scopus subject areas

  • General Chemistry
  • General Materials Science
  • Condensed Matter Physics

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