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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Oliveira, Leonardo
Technical University of Denmark
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (7/7 displayed)
- 2024Coupled local residual shear and compressive strain in NaNbO 3 ceramics under coolingcitations
- 2024Heterogeneous Antiferroelectric Ordering in NaNbO3-SrSnO3 Ceramics Revealed by Direct Superstructure Imaging
- 2024Heterogeneous Antiferroelectric Ordering in NaNbO 3 –SrSnO 3 Ceramics Revealed by Direct Superstructure Imaging
- 2024Advancing room temperature NO2 gas sensing performance through high-energy mechanical milling of Tin-dichalcogenides
- 2024Coupled local residual shear and compressive strain in NaNbO3 ceramics under coolingcitations
- 2023Combined Experimental and First Principles Study on Nanostructured NbFeSb Half- Heusler Alloy Synthesized by Mechanical Alloyingcitations
- 2022Piezoelectric properties of mechanochemically processed 0.67BiFeO3-0.33BaTiO3 ceramicscitations
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article
Coupled local residual shear and compressive strain in NaNbO3 ceramics under cooling
Abstract
<p>Stabilizing lead-free antiferroelectrics at room temperature is key for advancing greener and more efficient energy storage devices. While NaNbO<sub>3</sub> solid solutions hold great promise for high energy density applications, its pure form displays structural instabilities arising from irreversible electric-field induced phase transitions and/or an undesired coexistence with its ferroelectric polymorph. To unravel how mechanical constraints imposed by residual stresses, structural defects, and microstructure disrupt the stability of the NaNbO<sub>3</sub> antiferroelectric state, we used in situ Dark-Field X-ray Microscopy to map local microstructural deformations in a single embedded {100}<sub>pc</sub> grain. By replicating typical heat treatment conditions, we show that the ferroelectric phase nucleates as a result of the coupled interplay between residual shear and compressive strain distributions that manifest during cooling towards ambient temperature. In addition, the microstrain relaxation behavior indicates that long-range defects preferentially nucleate at the expense of the antiferroelectric phase in regions at sub-micrometer distances from the grain center. Our findings illustrate that adequate temperature control during low temperature sintering, heat treatments, or in operando conditions may be vital in dictating the structure-property relationships of NaNbO<sub>3</sub> ceramics, ensuring their suitability for efficient energy storage applications.</p>