Influence of composition on the unipolar electric fatigue of Ba(Zr0.2Ti0.8)O3-(Ba0.7Ca0.3)TiO3 lead-free piezoceramics

Virginia Rojas, Jurij Koruza*, Eric A. Patterson, Matias Acosta, Xijie Jiang, Na Liu, Christian Dietz, Jürgen Rödel

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


The lead-free (1−x)Ba(Zr0.2Ti0.8)O3-x(Ba0.7Ca0.3)TiO3 system is considered as promising candidate for the replacement of lead-based piezoceramics in actuation applications, during which electric fatigue is a major concern. This issue was addressed in this work, where the unipolar fatigue resistance of three (1−x)Ba(Zr0.2Ti0.8)O3-x(Ba0.7Ca0.3)TiO3 compositions with different crystallographic structures (rhombohedral, orthorhombic, and tetragonal) was evaluated. Strain asymmetry and development of an internal bias field were observed in all compositions. The decrease in the remanent polarization and the large signal piezoelectric coefficient after 107 unipolar cycles was found to lie between 6%-12% and 2%-13%, respectively. The most pronounced fatigue was observed for the orthorhombic composition, which has the largest extrinsic contribution to strain. On the other hand, the best fatigue resistance was observed for the tetragonal composition, which has a predominantly intrinsic strain response. The correlation of fatigue resistance with strain mechanism was corroborated with determination of the Rayleigh parameters and changes in the domain morphology after cycling as confirmed by piezoresponse force microscopy.

Original languageEnglish
Pages (from-to)4699-4709
Number of pages11
JournalJournal of the American Ceramic Society
Issue number10
Publication statusPublished - Oct 2017


  • cyclic fatigue
  • domains
  • fatigue
  • lead-free ceramics
  • piezoelectric materials/properties

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry


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