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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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Buckman, Jim
Heriot-Watt University
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (15/15 displayed)
- 2023Thermoelectric properties of the aliovalent half-Heusler alloy Zn 0.5 Ti 0.5 NiSb with intrinsic low thermal conductivitycitations
- 2023Thermoelectric properties of the aliovalent half-Heusler alloy Zn0.5Ti0.5NiSb with intrinsic low thermal conductivitycitations
- 2022Unravelling the role of natural imperfections on the mechanical behaviour of cemented granular systems: insights from naturally weakly cemented sands
- 2021Evolution of meniscus structures in hydrophobic granular systemscitations
- 2019Optimizing Thermoelectric Power Factor in p-Type Hydrogenated Nano-crystalline Silicon Thin Films by Varying Carrier Concentrationcitations
- 2019Phase stability and thermoelectric properties of TiCoSb-TiM2Sn (M = Ni, Fe) Heusler compositescitations
- 2018Grain-by-grain compositional variations and interstitial metals—a new route toward achieving high performance in half-Heusler thermoelectricscitations
- 2018Analysis of Sandstone Pore Space Fluid Saturation and Mineralogy Variation via Application of Monostatic K-Band Frequency Modulated Continuous Wave Radarcitations
- 2018Hydrogenated Nano-/Micro-Crystalline Silicon Thin-Films for Thermoelectricscitations
- 2018Grain-by-grain compositional variations and interstitial metals - a new route towards achieving high performance in Half-Heusler thermoelectricscitations
- 2018Substitution versus full-Heusler segregation in TiCoSbcitations
- 2018Grain-Scale Heterogeneity in Deep Water Massive Sands – Implications for Depositional Processes and Reservoir Quality
- 2018Grain-by-Grain Compositional Variations and Interstitial Metals -: A New Route toward Achieving High Performance in Half-Heusler Thermoelectricscitations
- 2016Monitoring micro-crack healing in an engineered cementitious composite using the environmental scanning electron microscopecitations
- 2016Thermoelectric properties and high-temperature stability of the Ti1-xVxCoSb1-xSnx half-Heusler alloyscitations
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article
Substitution versus full-Heusler segregation in TiCoSb
Abstract
Half-Heuslers (HHs) are promising thermoelectric materials with great compositional flexibility. Here, we extend work on the p-type doping of TiCoSb using abundant elements. Ti<sub>0.7</sub>V<sub>0.3</sub>Co<sub>0.85</sub>Fe<sub>0.15</sub>Sb<sub>0.7</sub>Sn<sub>0.3</sub> samples with nominal 17.85 p-type electron count were investigated. Samples prepared using powder metallurgy have negative Seebeck values, S ≤ -120 µV K<sup>-1</sup>, while arc-melted compositions are compensated semiconductors with S = -45 to +30 µV K<sup>-1</sup>. The difference in thermoelectric response is caused by variations in the degree of segregation of V(Co<sub>0.6</sub>Fe<sub>0.4</sub>)<sub>2</sub>Sn full-Heusler and Sn phases, which selectively absorb V, Fe, and Sn. The segregated microstructure leads to reduced lattice thermal conductivities, κ<sub>lat</sub> = 4.5-7 W m<sup>-1</sup> K<sup>-1</sup> near room temperature. The largest power factor, S<sup>2</sup>/ρ = 0.4 mW m<sup>-1</sup> K<sup>-2</sup> and ZT = 0.06, is observed for the n-type samples at 800 K. This works extends knowledge regarding suitable p-type dopants for TiCoSb.