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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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Huo, Da
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Publications (6/6 displayed)
- 2020Impact of Preoxidation Treatments on Performances of Pitch-Based Hard Carbons for Sodium-Ion Batteriescitations
- 2016Grain size-dependent electrical properties of La 1.95 Sr 0.05 Zr 2 O 7-δ as potential Proton Ceramic Fuel Cell electrolytecitations
- 2015Impact of Spark Plasma Sintering Conditions on Ionic Conductivity in La<sub>1.95</sub>Sr<sub>0.05</sub>Zr<sub>2</sub>O<sub>7-δ</sub> Electrolyte Material for Intermediate Temperature SOFCscitations
- 2015Influence of sintering methods on microstructure and ionic conductivity of La1.95Sr0.05Zr2O6.975 synthesized by co-precipitationcitations
- 2015Impact of Spark Plasma Sintering Conditions on Ionic Conductivity in La1.95Sr0.05Zr2O7-δ Electrolyte Material for Intermediate Temperature SOFCscitations
- 2015Impact of Spark Plasma Sintering Conditions on Ionic Conductivity in La1.95Sr0.05Zr2O7-δ Electrolyte Material for Intermediate Temperature SOFCs
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article
Grain size-dependent electrical properties of La 1.95 Sr 0.05 Zr 2 O 7-δ as potential Proton Ceramic Fuel Cell electrolyte
Abstract
The effect of grain size on the electrical properties of Sr-doped La 2 Zr 2 O 7-δ ceramics densified by spark plasma sintering was studied by impedance spectroscopy. Structural and microstructural analyses were performed using X-ray and scanning electron microscopy techniques. Sets of samples with different grain sizes and relative densities have been obtained by playing on pressure or temperature during sintering. Depending on the grain size, different equivalent circuits are proposed and discussed. We show that varying the sintering conditions produces significant changes in the bulk and grain boundary conductivities, with a monotonic increase of the total conductivity with the increase of grain size. The Brick Layer Model (BLM) is used to explain the size and temperature dependencies of the total ionic conductivity of doped La 2-x Sr x Zr 2 O 7-δ (x = 0.05).