Synergistic homovalent and heterovalent substitution effects on piezoelectric and relaxor behavior in lead-free BaTiO3 ceramics

Summary

This study investigates lead-free BaTiO3 (BT) perovskite ceramics, unraveling the synergistic effects arising from simultaneous homovalent (Zr) and heterovalent (Nb) substitution. Focusing on piezoelectric, ferroelectric, and relaxor behaviors, this research employs a comprehensive suite of analyses, including temperature-dependent dielectric measurements, polarization-electric field hysteresis loops, and bipolar strain measurements. Significantly, our study unveils that the simultaneous substitution of Zr and Nb in the BT lattice induces roomtemperature relaxor behavior at relatively low concentrations (5 % Zr and 3 % Nb), yielding higher permittivity and larger maximum polarization compared to single element (Zr or Nb) substituted BT relaxors. Bipolar strain measurements showcase substantial large-signal d33* values (~250 pm/V) across a broad temperature range (–50 ◦C to 30 ◦C) for BT ceramics with simultaneous 5 % Zr and 2 % Nb substitution. This research advances understanding of homovalent and heterovalent substitution in BT ceramics and opens avenues for tailoring properties to suit specific applications.

Keywords: Ceramics, homovalent substitution effects, heterovalent substitution effects
Creators:
Academic units: Faculty of Science, Technology and Arts (STA) > Academic Departments > Department of Engineering and Mathematics
Funders:
Funder NameGrant NumberFunder ID
Austrian Science FundProject 14581http://dx.doi.org/10.13039/501100002428
Horizon 2020 Framework Programme817190https://doi.org/10.13039/100010661
Publisher of the data: Zenodo
Publication date: 11 September 2024
Data last accessed: No data downloaded yet
URL of the data (if published elsewhere): https://doi.org/10.5281/zenodo.13744933
SHURDA URI: https://shurda.shu.ac.uk/id/eprint/253

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Data may be available from external sources: https://doi.org/10.5281/zenodo.13744933

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