| People | Locations | Statistics |
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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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Boada, Roberto
Universitat Autònoma de Barcelona
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (13/13 displayed)
- 2021Photon-in/photon-out spectroscopy at the I20-scanning beamline at diamond light sourcecitations
- 2019Toward the Optimized Spintronic Response of Sn-Doped IrO <inf>2</inf> Thin Filmscitations
- 2016Effect of titania doping and sintering temperature on titanium local environment and electrical conductivity of YSZcitations
- 2014Structural determination of Bi-doped magnetite multifunctional nanoparticles for contrast imagingcitations
- 2014Structural determination of Bi-doped magnetite multifunctional nanoparticles for contrast imagingcitations
- 2014Relationships between structural and electrical properties in mixed conductors duplex materials in the ZrO2-Y2O3-TiO2 ternary systemcitations
- 2013XANES and EXAFS study of the local order in nanocrystalline yttria-stabilized zirconiacitations
- 2012Interfacial magnetic coupling between Fe nanoparticles in Fe-Ag granular alloyscitations
- 2011Enhanced protection of carbon-encapsulated magnetic nickel nanoparticles through a sucrose-based synthetic strategycitations
- 2011XMCD study of the induced magnetic moment in non-magnetic Ga and Ge atoms in intermetallic compounds
- 2010Ionic conductivity of nanocrystalline yttria-stabilized zirconiacitations
- 2010Microstructure and magnetism of nanoparticles with γ-Fe core surrounded by α-Fe and iron oxide shellscitations
- 2009Stress-induced curie temperature increase in the Fe64Ni 36 invar alloycitations
Places of action
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article
Relationships between structural and electrical properties in mixed conductors duplex materials in the ZrO2-Y2O3-TiO2 ternary system
Abstract
<p>Duplex materials constituted by 0.50 mol titania-doped yttria-stabilized zirconia (YSZ) and 0.50 mol titania-doped yttria-tetragonal zirconia polycrystalline (YTZP) solid solutions in the ZrO2-Y2O3-TiO2 ternary system can be obtained using different processing strategies. In this study, different amounts of TiO2 dopant and different sintering times have been used for the preparation of the duplex materials: Doping YSZ with 10 mol% of TiO2 and sintering in air for 8 h (10Ti8h) and doping YSZ with 15 mol% of TiO2 and sintering in air for 2 h (15Ti2h) are both successful routes to obtain duplex materials. If we compare the field emission scanning electron microscopy-energy dispersive x-ray analyses of each cubic and each tetragonal solid solution of the two duplex materials, we conclude that the composition of each phase is different from each other, as was expected. The total ionic conductivity of both duplex samples is strongly reduced with respect to that of YSZ, and this reduction increases with the Ti content. In addition, the activation energy for ionic migration in 10Ti8h and 15Ti2h is lower than that for YSZ but higher than that for YTZP, as expected in terms of the relative amount of both YSZ and YTZP fractions in the materials. X-ray absorption spectroscopy (XAS) results, both x-ray absorption near-edge structure and extended x-ray absorption fine structure, show that Ti is sixfold coordinated in both the cubic and tetragonal phases of the duplex materials, departing from the eightfold coordination expected if a simple substitution at the Zr sites would take place. The XAS results also point out that the ability of Ti to trap oxygen vacancies in the cubic phase increases as Ti content does, in agreement with the electrical conductivity behavior, which cannot be accounted for in terms of a dilution effect.</p>