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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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Steil, Marlu César
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Topics
Publications (9/9 displayed)
- 2021Flash sintering of cationic conductive ceramics: A way to build multilayer systemscitations
- 2020Electrochemical Flash Sintering: A New Tool to Obtain All Solid-State Batteries in Few Secondscitations
- 2019Long-term stability of iron-doped calcium titanate CaTi0.9Fe0.1O3−δ oxygen transport membranes under non-reactive and reactive atmospherescitations
- 2018Oxygen pressure dependence of the ionic conductivity of iron-doped calcium titanatecitations
- 2016Preparation, characterization and sintering of yttrium-doped ThO2 for oxygen sensors applicationscitations
- 2015Flash sintering incubation in Al2O3/TZP compositescitations
- 2012Ionically conducting ceramics for soot oxidation. Mechanistic study with O-18(2) isotopic exchangecitations
- 2005Thermal stability and preparation of dense membrane ceramics of BIMEVOXcitations
- 2005Impedance study of the microstructure dependence of the electrical properties of BIMEVOXescitations
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article
Preparation, characterization and sintering of yttrium-doped ThO2 for oxygen sensors applications
Abstract
The preparation of Th 1-x Y x O 2-x/2 ceramics, to be used as electrolyte in oxygen sensors for sodium-cooled nuclear reactors, was successfully undertaken from oxalate precursors. Such method was found to provide quantitative precipitation of the cations into (Th,Y)(C 2 O 4) 2 $2H 2 O solid solutions up to x ¼ 0.15 while a polyphase system was obtained for x ¼ 0.22. The corresponding oxides were obtained through heat treatment in air at 500 C and characterized by the means of PXRD, SEM and statistical X-EDS measurements. The conditions for the densification of Th 1-x Y x O 2-x/2 ceramics were further determined by dilatometry (T ¼ 1575 C, t ¼ 8 h) resulting in densification rates up to 99%. Finally, a first estimation of the electrical properties of the solids was undertaken by impedance spectroscopy. Electrical conductivity was found to increase linearly with the incorporation of Y 3þ content while the associated values of activation energy decreased, with a minimum value of 1.1 eV for Th 0.85 Y 0.15 O 1.925 .