Field-induced polarization response and energy storage behavior of lead-free BNT-BKT-SZ films

M. Afifi, A. O. Turky, M. Rasly, M. M. Rashad, J. A. Turner

Research output: Contribution to journalArticle

Abstract

Lead-free piezoelectric thin films of composition (1-x)Bi0.5Na0.5TiO3-xBi0.5K0.5TiO3-0.03SrZrO3 (x = 15, 17.5, 20 and 22.5%) have been created using the sol-gel spin coating approach over a Pt/Ti/SiO2/Si substrate. The X-ray diffraction profiles suggest that a remarkable transition from tetragonal to rhombohedral-phase passing by a morphotropic phase boundary (MPB) occurs at x values from 17.5 to 22.5%. Additionally, the surface morphology, piezoelectric response, ferroelectric behavior, and energy storage properties were also investigated. Piezoresponse force microscopy (PFM) depicted a strong piezoelectric and ferroelectric behavior at a very localized size; at x = 17.5%. The piezoelectric behavior was enhanced and reached values of the recoverable energy storage density (Jrec) and the energy storage efficiency (η) of 3.27 J/cm3, and 39.9%, respectively. Such materials are anticipated to play an important role in lead-free devices.

Original languageEnglish (US)
JournalCeramics International
DOIs
StateAccepted/In press - 2020

Keywords

  • BNT-BKT
  • Energy storage
  • Lead-free
  • PFM
  • Piezoelectric films

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Process Chemistry and Technology
  • Surfaces, Coatings and Films
  • Materials Chemistry

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