Preparation and multi-properties of insulated single-phase BiFeO3ceramics

G. L. Yuan, Siu Wing Or, Y. P. Wang, Z. G. Liu, J. M. Liu

Research output: Journal article publicationJournal articleAcademic researchpeer-review

159 Citations (Scopus)

Abstract

Six types of BiFeO3ceramic samples, with subtle differences in synthesis conditions, were prepared. The comparison of their phases, electrical resistivity, and porosity revealed that the use of Bi2O3and Fe2O3powders of <1 μm size and a rapid liquid-phase sintering process of 855 °C for 5 min at 100 °C/s is beneficial to synthesize poreless single-phase BiFeO3samples with high electrical resistivity of ∼5×1012Ω cm. Deoxygenated BixFeyO1.5x+1.5y-δ(x≠y, δ≥0) impurities were identified and found to be the main cause of low electrical resistivity and high porosity in the multi-phase samples. Large saturation polarization of 16.6 μC/cm2and low leakage current density of 30 mA/m2, both at a high electric field of 145 kV/cm, were measured in the optimized single-phase samples at room temperature besides a large piezoelectric d33coefficient of 27 pC/N and an obvious canted antiferromagnetic behavior.
Original languageEnglish
Pages (from-to)76-81
Number of pages6
JournalSolid State Communications
Volume138
Issue number2
DOIs
Publication statusPublished - 1 Apr 2006

Keywords

  • A. Single-phase BiFeO multiferroic ceramics 3
  • D. Antiferromagnetism
  • D. Electrical resistivity
  • D. Ferroelectricity
  • D. Piezoelectricity
  • D. Porosity
  • D. Rapid liquid-phase sintering

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics
  • Materials Chemistry

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