articleJournal of Applied PhysicsOct 1, 2011Closed access

On the phase identity and its thermal evolution of lead free (Bi1/2Na1/2)TiO3-6 mol% BaTiO3

Technische Universität Darmstadt · University of Leeds

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Abstract

Temperature-dependent dielectric permittivity of 0.94(Bi1/2Na1/2)TiO3-0.06BaTiO3 (BNT-6BT) lead-free piezoceramics was studied to disentangle the existing unclear issues over the crystallographic aspects and phase stability of the system. Application of existing phenomenological relaxor models enabled the relaxor contribution to the entire dielectric permittivity spectra to be deconvoluted. The deconvoluted data in comparison with the temperature-dependent dielectric permittivity of a classical perovskite relaxor, La-modified lead zirconate titanate, clearly suggest that BNT-6BT belongs to the same relaxor category, which was also confirmed by a comparative study on the temperature- dependent polarization…

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Authors

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Topics & keywords

Keywords
  • Materials science
  • Dielectric
  • Ferroelectricity
  • Lead zirconate titanate
  • Permittivity
  • Antiferroelectricity
  • Phase transition
  • Condensed matter physics
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