Local structural mechanism for enhanced energy storage properties in heterovalent doped NaNbO3 ceramics
(2024) In Journal of the European Ceramic Society 44(3). p.1597-1609- Abstract
In recent years, there is a growing interest for new lead-free oxides with reversible antiferroelectric (AFE)-ferroelectric (FE) phase transition for high-power energy-storage applications. NaNbO3-based ceramics are particularly attractive due to their easy synthesis and cost-effectiveness. In order to stabilize reversible AFE-FE phase transition, NaNbO3 is doped with a combination of heterovalent substitutions, although the underlying structural mechanism for the same is poorly understood. Here, we investigated local and average structures of Ca/Zr doped NaNbO3 using neutron total scattering. We show that Ca/Zr doping increases the average AFE phase (Pbma) fraction, however, the material remains as a... (More)
In recent years, there is a growing interest for new lead-free oxides with reversible antiferroelectric (AFE)-ferroelectric (FE) phase transition for high-power energy-storage applications. NaNbO3-based ceramics are particularly attractive due to their easy synthesis and cost-effectiveness. In order to stabilize reversible AFE-FE phase transition, NaNbO3 is doped with a combination of heterovalent substitutions, although the underlying structural mechanism for the same is poorly understood. Here, we investigated local and average structures of Ca/Zr doped NaNbO3 using neutron total scattering. We show that Ca/Zr doping increases the average AFE phase (Pbma) fraction, however, the material remains as a composite of both FE (P21ma) and AFE regions. Analysis of local structure suggests that increase in the long-range AFE phase results from more extensive twinning of local FE regions, due to introduced charge disorder. We propose that enhanced energy-storage properties of Ca/Zr-doped NaNbO3 arises from localized twin boundary motion between the defect-induced pinning centers.
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- author
- Htet, Cho Sandar ; Manjón-Sanz, Alicia Maria ; Liu, Jue ; Babori, Chaimae ; Barati, Mahmoud ; Marlton, Frederick P. ; Daniel, Laurent ; Jørgensen, Mads Ry Vogel LU and Pramanick, Abhijit
- organization
- publishing date
- 2024
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Antiferroelectric/ferroelectric, Neutron scattering, Pair distribution function, Phase transition
- in
- Journal of the European Ceramic Society
- volume
- 44
- issue
- 3
- pages
- 1597 - 1609
- publisher
- Elsevier
- external identifiers
-
- scopus:85175642369
- ISSN
- 0955-2219
- DOI
- 10.1016/j.jeurceramsoc.2023.10.072
- language
- English
- LU publication?
- yes
- id
- 052d61ec-77f1-46ba-a6ec-2f79924c1a45
- date added to LUP
- 2023-12-04 12:46:25
- date last changed
- 2024-01-09 15:44:51
@article{052d61ec-77f1-46ba-a6ec-2f79924c1a45, abstract = {{<p>In recent years, there is a growing interest for new lead-free oxides with reversible antiferroelectric (AFE)-ferroelectric (FE) phase transition for high-power energy-storage applications. NaNbO<sub>3</sub>-based ceramics are particularly attractive due to their easy synthesis and cost-effectiveness. In order to stabilize reversible AFE-FE phase transition, NaNbO<sub>3</sub> is doped with a combination of heterovalent substitutions, although the underlying structural mechanism for the same is poorly understood. Here, we investigated local and average structures of Ca/Zr doped NaNbO<sub>3</sub> using neutron total scattering. We show that Ca/Zr doping increases the average AFE phase (Pbma) fraction, however, the material remains as a composite of both FE (P2<sub>1</sub>ma) and AFE regions. Analysis of local structure suggests that increase in the long-range AFE phase results from more extensive twinning of local FE regions, due to introduced charge disorder. We propose that enhanced energy-storage properties of Ca/Zr-doped NaNbO<sub>3</sub> arises from localized twin boundary motion between the defect-induced pinning centers.</p>}}, author = {{Htet, Cho Sandar and Manjón-Sanz, Alicia Maria and Liu, Jue and Babori, Chaimae and Barati, Mahmoud and Marlton, Frederick P. and Daniel, Laurent and Jørgensen, Mads Ry Vogel and Pramanick, Abhijit}}, issn = {{0955-2219}}, keywords = {{Antiferroelectric/ferroelectric; Neutron scattering; Pair distribution function; Phase transition}}, language = {{eng}}, number = {{3}}, pages = {{1597--1609}}, publisher = {{Elsevier}}, series = {{Journal of the European Ceramic Society}}, title = {{Local structural mechanism for enhanced energy storage properties in heterovalent doped NaNbO<sub>3</sub> ceramics}}, url = {{http://dx.doi.org/10.1016/j.jeurceramsoc.2023.10.072}}, doi = {{10.1016/j.jeurceramsoc.2023.10.072}}, volume = {{44}}, year = {{2024}}, }