Local structure and piezoelectric instability in lead-free (1 - X)BaTiO3-xA(Cu1/3Nb2/3)O3 (A = Sr, Ca, Ba) solid solutions

Deepam Maurya, Ashok Kumar, Valeri Petkov, James E. Mahaney, Ram S. Katiyar, Shashank Priya

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24 Scopus citations

Abstract

This study provides a fundamental understanding of the enhanced piezoelectric instability in ABO3 perovskite based lead-free piezoelectric materials. For this we synthesized (1 - x)BaTiO 3-xA(Cu1/3Nb2/3)O3 (A: Sr, Ba and Ca and x = 0.0-0.03) solid solutions exhibiting high piezoelectric response. The piezoelectric instability in these compositions was found to increase with x despite monotonous decrease in the long range polar ordering. High energy X-ray diffraction coupled with atomic pair distribution functions (PDF)s indicated an increase in local polarization. Raman scattering and EPR analysis revealed that substitutions on A and B sites both substantially perturbed the local octahedral dynamics and resulted in localized nano polar regions which imparted the high piezoelectric response.

Original languageEnglish (US)
Pages (from-to)1283-1292
Number of pages10
JournalRSC Advances
Volume4
Issue number3
DOIs
StatePublished - 2014

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)

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