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

Abstract 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...

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Bibliographic Details
Published inOxford open materials science Vol. 3; no. 1
Main Authors Tina, Getaw Abebe, Muleta, Gudeta Jafo, Adhikary, Gobinda Das, Ranjan, Rajeev
Format Journal Article
LanguageEnglish
Published Oxford University Press 04.01.2023
Subjects
perovskites
ferroelectrics
Na
Pb-free piezoceramics
Bi
piezoelectrics
ultrahigh electrostrain
TiO
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Summary:Abstract 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.
ISSN:2633-6979
2633-6979
DOI:10.1093/oxfmat/itad021