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

14 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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