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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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| 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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| 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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| 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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Han, Jin Kyu
in Cooperation with on an Cooperation-Score of 37%
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Publications (5/5 displayed)
- 2024Oxygen-defective electrostrictors for soft electromechanicscitations
- 2024Oxygen-defective electrostrictors for soft electromechanicscitations
- 2021Gigantic electro-chemo-mechanical properties of nanostructured praseodymium doped ceriacitations
- 2021Gigantic electro-chemo-mechanical properties of nanostructured praseodymium doped ceriacitations
- 2020The role of oxygen defects on the electro-chemo-mechanical properties of highly defective gadolinium doped ceriacitations
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article
Gigantic electro-chemo-mechanical properties of nanostructured praseodymium doped ceria
Abstract
Some oxygen defective fluorites are non-Newnham electrostrictors, <em>i.e.</em>,the electromechanical response does not depend on their dielectricproperties. Here, we show gigantic electrostriction in nanocrystalline25 mol% praseodymium doped ceria (PCO) bulk ceramics. The material wasfabricated with a field-assisted spark plasma sintering (SPS) processfrom high-purity nanoscale PCO powders (<20 nm). The SPS processconsolidates the powders into a single-phase, highly dense material witha homogeneous microstructure and large grain boundary extension.Various thermally and chemically stable ionic defects are incorporatedinto the nanostructure, leading to superior electrical conductivity. Thematerial shows an electrostriction strain coefficient (<em>M</em><sub>33</sub>) of ∼10<sup>−16</sup> m<sup>2</sup> V<sup>−2</sup>at frequencies below 100 Hz at room temperature. Such performance iscomparable and even superior to Newnham's electrostrictors, such asferroelectric ceramics and polymeric actuators. Comparative analysiswith polycrystals suggests that nanostructured PCO possesseselectromechanically active nanodomains of Pr<sup>3+</sup>–V<sub>O</sub> pairs. Such results are unexpected and open novel insights on non-Newnham electrostrictors.