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Optimized thermoelectric performance of the n-type half-Heusler material TiNiSn by substitution and addition of Mn

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Lkhagvasuren,  Enkhtaivan
Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Ouardi,  Siham
Siham Ouardi, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Fecher,  Gerhard H.
Gerhard Fecher, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Auffermann,  Gudrun
Gudrun Auffermann, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Kreiner,  Guido
Guido Kreiner, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Schnelle,  Walter
Walter Schnelle, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Felser,  Claudia
Claudia Felser, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Citation

Lkhagvasuren, E., Ouardi, S., Fecher, G. H., Auffermann, G., Kreiner, G., Schnelle, W., et al. (2017). Optimized thermoelectric performance of the n-type half-Heusler material TiNiSn by substitution and addition of Mn. AIP Advances, 7(4): 045010, pp. 1-6. doi:10.1063/1.4979816.


Cite as: https://hdl.handle.net/11858/00-001M-0000-002D-5050-3
Abstract
Alloys based on the half-Heusler compound TiNiSn with the addition of Mn or with a substitution of Ti by Mn are investigated as high-temperature thermoelectric materials. In both materials an intrinsic phase separation is observed, similar to TiNiSn where Ti has been partially substituted by Hf, with increasing Mn concentration the phase separation drastically reduces the lattice thermal conductivity while the power factor is increased. The thermoelectric performance of the n-type conducting alloy can be optimized both by substitution of Ti by Mn as well as the addition of Mn. (C) 2017 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).