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Is electrostrain >1 in oxygen deficient Na0.5Bi0.5TiO3 a composition effect?

Tina, GA and Muleta, GJ and Adhikary, GD and Ranjan, R (2023) Is electrostrain >1 in oxygen deficient Na0.5Bi0.5TiO3 a composition effect? In: Oxford Open Materials Science, 3 (1).

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Official URL: https://doi.org/10.1093/oxfmat/itad021


For over two decades Na0.5Bi0.5TiO3 (NBT) -based lead-free piezoelectrics have attracted attention due to its ability to exhibit large electric-field driven strain. Compared to the popular Pb(Zr, Ti)O3 (PZT)-based piezoelectrics, which exhibit electrostrain of about 0.3, the derivatives of NBT-based lead-free piezoelectrics at the ergodic - non ergodic relaxor crossover exhibit larger electric-field driven strain �0.45. In recent years, there has been a concerted effort to increase the maximum electrostrain in lead-free piezoceramics. Recent reports suggest that oxygen deficient NBT- based piezoceramics can exhibit electrostrain �1. In this paper we explore this phenomenon and show that the ultra high electric field driven strain measured is primarily a consequence of reducing the thickness of the disc dimension below 500 microns and not an exclusive effect of the composition. © 2023 The Author(s). Published by Oxford University Press.

Item Type: Journal Article
Publication: Oxford Open Materials Science
Publisher: Oxford University Press
Additional Information: The copyright for this article belongs to author.
Keywords: Bismuth compounds; Electric fields; Oxygen; Piezoelectric ceramics; Sodium compounds, Electrostrain; Lead-free piezoelectrics; Na0.5bi0.5TiO3; Oxygen deficient; Pb-free; Pb-free piezoceramic; Piezo-ceramics; Piezoelectric; TiO; Ultrahigh electrostrain, Perovskite
Department/Centre: Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited: 01 Mar 2024 05:21
Last Modified: 01 Mar 2024 05:21
URI: https://eprints.iisc.ac.in/id/eprint/83760

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