The role of oxygen defects on the electro-chemo-mechanical properties of highly defective gadolinium doped ceria
Kabir A, Kyu Han J, Merle B, Esposito V (2020)
Publication Type: Journal article
Publication year: 2020
Journal
Book Volume: 266
Article Number: 127490
DOI: 10.1016/j.matlet.2020.127490
Abstract
In light of the recent discovery of giant electrostriction in defective fluorites, here we investigate the interplay between mechanical, electrochemical and electromechanical properties of oxygen defective ceria compositions (Ce1−xGdxO2−δ) as the effect of Gd-doping (x = 0.05–0.3) at low temperatures. Highly dense polycrystalline ceramics are prepared as micron-size grains with a minimized grain boundary extent. Electrochemical ionic migration by impedance spectroscopy reveals that dopant content controls the oxygen vacancies association in the samples. Interestingly, we observe that electromechanical activity is strongly controlled by the local oxygen vacancy configuration rather than on its nominal concentration. The primary creep at room temperature indicates a declining viscoelastic trend with increasing oxygen defects.
Authors with CRIS profile
Additional Organisation(s)
Interdisziplinäres Zentrum, Center for Nanoanalysis and Electron Microscopy (CENEM)
Lehrstuhl für Werkstoffwissenschaften (Allgemeine Werkstoffeigenschaften)
Involved external institutions
Denmark (DK)How to cite
APA:
Kabir, A., Kyu Han, J., Merle, B., & Esposito, V. (2020). The role of oxygen defects on the electro-chemo-mechanical properties of highly defective gadolinium doped ceria. Materials Letters, 266. https://dx.doi.org/10.1016/j.matlet.2020.127490
MLA:
Kabir, Ahsanul, et al. "The role of oxygen defects on the electro-chemo-mechanical properties of highly defective gadolinium doped ceria." Materials Letters 266 (2020).
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