Piezoelectric and ferroelectric properties of lead-free Ga-modified 0.65BiFeO3–0.35BaTiO3 ceramics by water quenching process

  • Salman Ali Khan
  • , Fazli Akram
  • , Rizwan Ahmed Malik
  • , Jun Chan Kim
  • , Riffat Asim Pasha
  • , Soonil Lee
  • , Tae Kwon Song
  • , Yeon Soo Sung
  • , M. H. Kim

Research output: Contribution to journalArticlepeer-review

15 Scopus citations

Abstract

Binary solid solution of gallium (Ga3+)-modified 0.65Bi1.05FeO3–0.35BaTiO3 (BFGO–BTO with 0–2 mol% Ga3+ content) ceramics were synthesized by a solid-state reaction method, followed by water quenching process. The effects of Ga3+ modifications on the crystal structure, microstructure, dielectric, ferroelectric, and piezoelectric properties of the BFO–BTO ceramics were studied. X-ray diffraction patterns confirmed a single perovskite phase without any secondary phases. Improvements of ferroelectric and piezoelectric properties were obtained at the optimum composition of BFGO–BTO system. Meanwhile, BFGO–BTO ceramics had a high static piezoelectric coefficient (d33) of 128 pC/N at 1.5 mol% Ga3+-content with relatively high operating temperature compared to other lead-free bismuth (Bi)-based systems.

Original languageEnglish
Pages (from-to)54-60
Number of pages7
JournalFerroelectrics
Volume541
Issue number1
DOIs
StatePublished - 12 Mar 2019
Externally publishedYes

Keywords

  • BFGO–BTO
  • dielectric
  • ferroelectric properties
  • Lead-free piezoelectric

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