Studies of structural and electrical properties on four-layers Aurivillius phase BaBi 4Ti 4O 15

Huiqing Fan, Pinyang Fang, Zengzhe Xi, Weixing Chen

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Abstract

BaBi 4Ti 4O 15 (BBT) ceramic was synthesized using mixed oxide route and the structural and electrical properties were investigated systematically. The structural studies confirmed it to be an n=4 member of the Aurivillius oxide. A broad dielectric peak with frequency dependent dielectric maximum temperature was observed. The dielectric relaxation obeyed the Vogel-Fulcher relation wherein f 0=8.37E14 Hz, E a=0.13 eV, and T f=608.18 K. The diffuseness parameter γ established the relaxor nature and it was attributed to the A-site cationic disorder. The specimen exhibited the excellent reproducibility in the measurements of displacement current, a remnant polarization of 5.4 μC/cm 2, and a coercive field of 4.03 MV/m. The room temperature piezoelectric coefficient d 33 was found to be 23 pC/N and the field-induced strain S was about 0.018% at the 8 MV/m electric field.

Original languageEnglish
Pages (from-to)979-983
Number of pages5
JournalSolid State Communications
Volume152
Issue number12
DOIs
StatePublished - Jun 2012

Keywords

  • A. Ferroelectrics
  • B. BBT
  • D. Relaxation phase transition

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