Yang, F. orcid.org/0000-0002-6428-7755, Li, M., Li, L. et al. (3 more authors) (2017) Review: Defect chemistry and electrical properties of sodium bismuth titanate perovskite. Journal of Materials Chemistry A, 13 (6). 5243-5254 . ISSN 2050-7488
Abstract
The ferroelectric perovskite Na0.5Bi0.5TiO3, NBT, can exhibit three types of electrical behaviour, i.e. oxide-ion conduction (Type I), mixed ionic-electronic conduction (Type II) and insulating/dielectric (Type III) based on various defect mechanisms. Here we review how to tune the electrical properties of NBT via several mechanisms, including A-site Na or Bi non-stoichiometry, isovalent substitution, acceptor- and donor-doping. The diversity of electrical behaviour in the NBT lattice is attributed to the high level of oxide-ion conductivity originating from highly mobile oxygen ions which can be fine-tuned to optimise or suppress the ionic conduction. High oxide-ion conductivity can be obtained by manipulating the starting Na/Bi ≥ 1 and by acceptor-doping to make NBT a potential electrolyte material for intermediate temperature solid oxide fuel cells (IT-SOFCs). In contrast, the oxide-ion conduction can be partially or fully suppressed by having a starting (nominal) composition with Na/Bi < 1, donor-doping, or utilising the trapping between oxygen vacancies and some B-site acceptor dopants. This significantly reduces the dielectric loss and makes NBT-based materials excellent candidates as high-temperature dielectrics for capacitor applications.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | Open Access Article. Published on 28 November 2017. This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. |
Dates: |
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Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Engineering (Sheffield) > Department of Materials Science and Engineering (Sheffield) |
Funding Information: | Funder Grant number ENGINEERING AND PHYSICAL SCIENCE RESEARCH COUNCIL (EPSRC) EP/L027348/1 |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 29 Nov 2017 15:00 |
Last Modified: | 28 Nov 2018 01:38 |
Published Version: | https://doi.org/10.1039/C7TA09245H |
Status: | Published |
Publisher: | Royal Society of Chemistry |
Refereed: | Yes |
Identification Number: | 10.1039/C7TA09245H |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:124635 |