| 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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Janka, Oliver
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (20/20 displayed)
- 2024Ferrocene-Modified Polyacrylonitrile-Containing Block Copolymers as Preceramic Materials
- 2024On the Ytterbium Valence and the Physical Properties in Selected Intermetallic Phases
- 2024Nominal CaAl2Pt2 and Ca2Al3Pt – two new Intermetallic Compounds in the Ternary System Ca−Al−Pt
- 2024Synthesis, magnetic and NMR spectroscopic properties of the MAl5Pt3 series (M = Ca, Y, La–Nd, Sm–Er)†citations
- 2023Eu4Al13Pt9 – a coloring variant of the Ho4Ir13Ge9 type structurecitations
- 2023Single‐Source Precursors for the Chemical Vapor Deposition of Iron Germanides
- 2023Raman and NMR spectroscopic and theoretical investigations of the cubic laves-phases REAl2 (RE = Sc, Y, La, Yb, Lu)citations
- 2023Self-Assembly of Polymer-Modified FePt Magnetic Nanoparticles and Block Copolymerscitations
- 2023On the RE2TiAl3 (RE = Y, Gd–Tm, Lu) Series : The First Aluminum Representatives of the Rhombohedral Mg2Ni3Si Type Structure
- 2023MAl4Ir2 (M = Ca, Sr, Eu): superstructures of the KAu4In2 typecitations
- 2023Trivalent europium – a scarce case in intermetallicscitations
- 2023Crystalline Carbosilane-Based Block Copolymers: Synthesis by Anionic Polymerization and Morphology Evaluation in the Bulk Statecitations
- 2022Crystalline Carbosilane‐Based Block Copolymers: Synthesis by Anionic Polymerization and Morphology Evaluation in the Bulk State
- 2022MAl4Ir2 (M = Ca, Sr, Eu) : superstructures of the KAu4In2 type
- 2020Squares of gold atoms and linear infinite chains of Cd atoms as building units in the intermetallic phases REAu4Cd2 (RE=La–Nd, Sm) with YbAl4Mo2-type structurecitations
- 2017Microstructure investigations of Yb- and Bi-doped Mg 2 Si prepared from metal hydrides for thermoelectric applicationscitations
- 2017Hydrogenation-induced cerium valence change in CeNiZncitations
- 2016Cerium intermetallics CeTX – review IIIcitations
- 2016Cerium intermetallics with TiNiSi-type structurecitations
- 2014The gallium intermetallics REPdGa3 (RE = La, Ce, Pr, Nd, Sm, Eu) with SrPdGa3-type structurecitations
Places of action
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article
Microstructure investigations of Yb- and Bi-doped Mg 2 Si prepared from metal hydrides for thermoelectric applications
Abstract
ithin the field of thermoelectric materials for energy conversion magnesium silicide, Mg2Si, is an outstanding candidate due to its low density, abundant constituents and low toxicity. However electronic and thermal tuning of the material is a required necessity to improve its Figure of Merit, zT. Doping of Yb via reactive YbH2 into the structure is performed with the goal of reducing the thermal conductivity. Hydrogen is released as a by-product at high temperatures allowing for facile incorporation of Yb into the structure. We report on the properties of Yb- and Bi-doped Mg2Si prepared with MgH2 and YbH2 with the focus on the synthetic conditions, and samples’ microstructure, investigated by various electron microscopy techniques. Yb is found in the form of both Yb3Si5 inclusions and Yb dopant segregated at the grain boundary substituting for Mg. The addition of 1 at% Yb concentration reduced the thermal conductivity, providing a value of 30 mW/cm K at 800 K. In order to adjust carrier concentration, the sample is additionally doped with Bi. The impact of the microstructure on the transport properties of the obtained material is studied. Idealy, the reduction of the thermal conductivity is achieved by doping with Yb and the electronic transport is adjusted by doping with Bi. Large grain microstructure facilitates the electronic transport. However, the synthetic conditions that provide the optimized microstructure for electrical transport do not facilitate the additional Yb dopant incorporation. Therefore, the Yb and Bi containing sample with the optimized microstructure provides a zT=0.46 at 800 K.