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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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Han, Li
Technical University of Denmark
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (20/20 displayed)
- 2020Interface fracture energy of contact layers in a solid oxide cell stackcitations
- 2018High-temperature thermoelectric properties of Na- and W-Doped Ca3Co4O9 system citations
- 2017Mid-IR optical properties of silicon doped InPcitations
- 2017Thermal operating window for PEDOT:PSS films and its related thermoelectric propertiescitations
- 2017Thermal operating window for PEDOT:PSS films and its related thermoelectric propertiescitations
- 2016On the Challenges of Reducing Contact Resistances in Thermoelectric Generators Based on Half-Heusler Alloyscitations
- 2016On the Challenges of Reducing Contact Resistances in Thermoelectric Generators Based on Half-Heusler Alloyscitations
- 2016On the Challenges of Reducing Contact Resistances in Thermoelectric Generators Based on Half-Heusler Alloyscitations
- 2016Effects of spark plasma sintering conditions on the anisotropic thermoelectric properties of bismuth antimony telluridecitations
- 2016Scandium-doped zinc cadmium oxide as a new stable n-type oxide thermoelectric materialcitations
- 2016Promising bulk nanostructured Cu2Se thermoelectrics via high throughput and rapid chemical synthesiscitations
- 2014Characterization of the interface between an Fe–Cr alloy and the p-type thermoelectric oxide Ca3Co4O9citations
- 2014The effect of setting velocity on the static and fatigue strengths of self-piercing riveted joints for automotive applications
- 2014Fabrication, spark plasma consolidation, and thermoelectric evaluation of nanostructured CoSb3citations
- 2014Characterization of the interface between an Fe–Cr alloy and the p -type thermoelectric oxide Ca 3 Co 4 O 9citations
- 2014Fabrication, spark plasma consolidation, and thermoelectric evaluation of nanostructured CoSb 3citations
- 2013The Influence of α- and γ-Al 2 O 3 Phases on the Thermoelectric Properties of Al-doped ZnOcitations
- 2013The Influence of α- and γ-Al2O3 Phases on the Thermoelectric Properties of Al-doped ZnOcitations
- 2008Formation and microstructure of (Ti, V)C-reinforeed iron-matrix composites using self-propagating high-temperature synthesis
- 2006Fretting behaviour of self-piercing riveted aluminium alloy joints under different interfacial conditions
Places of action
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article
The Influence of α- and γ-Al2O3 Phases on the Thermoelectric Properties of Al-doped ZnO
Abstract
A systematic investigation on the microstructure and thermoelectric properties of Al-doped ZnO using α- and γ-Al2O3 as dopants was conducted in order to understand the doping effect and its mechanism. The samples were prepared by the spark plasma sintering technique from precursors calcined at various temperatures. Clear differences in microstructure and thermoelectric properties were observed between the samples doped with α- and γ-Al2O3. At any given calcination temperature, γ-Al2O3 resulted in the formation of a larger amount of the ZnAl2O4 phase in the Al-doped ZnO samples. The average grain size was found to be smaller for the γ-Al2O3-doped samples than that for the α-Al2O3-doped ones under the same sintering condition. It is proposed that the ZnAl2O4 phase is the reason for the observed suppression of grain growth and also for the slightly reduced lattice thermal conductivity exhibited by these samples. The γ-Al2O3 promoted the substitution for donor impurities in ZnO, thus resulting in shrinkage of the unit cell volume and an increase in the electrical conductivity compared with the α-Al2O3-doped ZnO. At a calcination temperature of 1173K, the γ-Al2O3-doped sample showed a ZT value of 0.17 at 1173K, which is 27% higher than that of the α-Al2O3-doped sample.