| 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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Floch, S. Le
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (5/5 displayed)
- 2019Sol-gel preparation of doped-metal oxide nanostructures for the thermoelectric conversion of energy
- 2017Oxide Thermoelectrics Nanostructured by Spinodal Decomposition
- 2017Development of intra- and inter-granular nanometric architectures in metal oxides for the thermoelectric conversion of energy.
- 2017Development of thermoelectric metal oxides : the case of doped TiO2
- 2009High pressure-high temperature synthesis of diamond from single-wall pristine and iodine doped carbon nanotube bundlescitations
Places of action
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document
Development of thermoelectric metal oxides : the case of doped TiO2
Abstract
High-efficiency thermoelectric (TE) materials are important for power-generation devices that are designed to convert waste heat into electrical energy or to use in solid-state refrigeration. These applications require innovative materials which not only possess high conversion efficiency but should also be no toxic and have high chemical stability in air, over a wide temperature range such as oxide materials. The latter efficiency is related to high dimensionless number called figure of merit, “ZT” which is a combination of three material properties: Seebeck coefficient, electrical conductivity and thermal conductivity), The advent of nanotechnology has had a dramatic effect on thermoelectric material development and has resulted in the synthesis of nanostructured materials whose thermoelectric properties surpass the best performance of conventional materials mainly because of the reduction if the lattice thermal conductivity. In the context of this PhD, we are exploring the effects of resonant levels on the thermoelectric power factor of TiO2 on the basis of our recent theoretical developments [1-2] together with the effects of the nano-structration. Indeed, while TiO2 is a cheap, chemically stable and not toxic material, its poor electronical conduction remains a technological limitation to meet the requirements for thermoelectric applications as for other metal oxides.In this preliminary communication, we will first present a new approach combining the sol-gel process with spark plasma sintering (SPS) to yield functional doped nano-TiO2 dense ceramic. Impact of the temperature of SPS process onto the densification, the nano-structuration and the dopant distribution will be addressed as well as the oxygen reduction after sintering. Then, the thermoelectric properties of doped Nb-TiO2 will be presented.[1] “Unified modelling of the thermoelectric properties in SrTiO3” G. Bouzerar, S. Thébaud, Ch. Adessi, R. Debord, M. Apreutezei, R. Bachelet and S. Pailhès, EPL118, 6 (2017) [2] “Boosting the power factor with resonant states: A model study” S. Thébaud, Ch. Adessi, S. Pailhès et G. Bouzerar, Phys. Rev. B 96, 075201(2017)