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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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Bauer, Ernst
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Topics
Publications (9/9 displayed)
- 2024Record‐High Thermoelectric Performance in Al‐Doped ZnO via Anderson Localization of Band Edge Statescitations
- 2022Thermoelectric properties of Cu‐Doped Heusler compound Fe<sub>2‐<i>x</i></sub>Cu<sub><i>x</i></sub>VAlcitations
- 2021Properties of HPT-Processed Large Bulks of p-Type Skutterudite DD0.7Fe3CoSb12 with ZT > 1.3citations
- 2017Pressure-induced anomalous valence crossover in cubic YbCu5-based compoundscitations
- 2017Finite size effect on the structural and magnetic properties of MnAs/GaAs(001) patterned microstructures thin filmscitations
- 2014Growth, reaction and nanowire formation of Fe on the ZnS(100) surfacecitations
- 2012Spinodal decomposition in (CaxBa1-x)(y)Fe4Sb12citations
- 2007Magnetostructure of MnAs on GaAs revisitedcitations
- 2004Head-to-head domain-wall phase diagram in mesoscopic ring magnetscitations
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article
Spinodal decomposition in (CaxBa1-x)(y)Fe4Sb12
Abstract
The thermoelectric and structural properties of a double filled skutterudite solid solution (CaxBa1-x)(y)Fe4Sb12 were investigated. Using X-ray powder and X-ray micro analyses (EPMA) an immiscibility gap was established with a critical point at x approximate to 0.45 and a critical temperature that depends on the filling level (T-C = 590 +/- 5 degrees C at y = 0.8 and T-C = 610 +/- 5 degrees C at y = 0.9). The thermoelectric properties were measured for samples prepared in four different states: (i) a single phase solid solution (CaxBa1-x)(5)Fe4Sb12; (ii) a two phase microcrystalline mixture of CayFe4Sb12 and BayFe4Sb12; (iii) a single phase structure obtained after annealing of the latter sample at 600 degrees C for 200 h; (iv) a spinodally demixed sample after annealing at 400 degrees C for 672 h. The thermoelectric properties of the phase mixture (ii) are compatible with data reported for the microcrystalline end members (CayFe4Sb12 and BayFe4Sb12), whilst the single phase (i and iii) and spinodally decomposed (iv) samples show increased thermopower and decreased thermal conductivity, similarly to those observed for nano-structured CayFe4Sb12 and BayFe4Sb12.