Dielectric characteristics and polarization response of lead-free ferroelectric (Bi0.5Na0.5)0.94Ba 0.06TiO3-P(VDF-TrFE) 0-3 composites

X. X. Wang, Kwok Ho Lam, X. G. Tang, H. L W Chan

Research output: Journal article publicationJournal articleAcademic researchpeer-review

45 Citations (Scopus)

Abstract

Bismuth sodium barium titanate/poly(vinylidene fluoride-trifluoroethylene) 70/30 [(Bi0.5Na0.5)0.94Ba0.06TiO3-P(VDF-TrFE)] 0-3 composites were prepared by a hot-press method for different volume fractions of (Bi0.5Na0.5)0.94Ba0.06TiO3ceramic powder in a P(VDF-TrFE) 70/30 copolymer matrix. The relative permittivity and dielectric loss of the composites increased with increase in the volume fraction of the ceramics, which well follows the Bruggeman model. The polarization responses of the composites were strongly dependent on the ceramic volume fraction. The composites with a higher ceramic volume fraction showed an increase in remanent polarization. At room temperature, a 0.3(Bi0.5Na0.5)0.94Ba0.06TiO3-0.7P(VDF-TrFE) composite showed a relative permittivity εr= 30, remanent polarization Pr= 12μC/cm2and coercive field Ec= 44kV/mm.
Original languageEnglish
Pages (from-to)695-699
Number of pages5
JournalSolid State Communications
Volume130
Issue number10
DOIs
Publication statusPublished - 1 Jun 2004

Keywords

  • A. Ferroelectricity
  • D. Dielectric response
  • D. Phase transitions

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

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