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Peltier effect during spark plasma sintering (SPS) of thermoelectric materials

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Abstract

Spark plasma sintering (SPS) is a versatile and effective rapid processing technique to sinter nanostructured thermoelectric (TE) materials. This paper presents a combined experimental and modelling investigation of the Peltier effect during SPS processing of TE materials. The Peltier effect is related to the transport of heat by an electric current and produces a temperature gradient. This heat flow manifests itself at the junction between two dissimilar materials at which heat is evolved or absorbed. During SPS processing, the Peltier effect could manifest itself as a significant temperature gradient across the sample. The Peltier effect was found to produce a temperature gradient of 55 °C during the SPS processing of MgSi2 (ZT = 1.4, 3 mm sample thickness) and 60 °C for MnSi1.4 (ZT = 0.4, 3 mm sample thickness). The overall developed experimental and numerical methodology allowed us to confirm the existence of the Peltier effect and to quantify its magnitude. This enabled us to determine a correlation between the SPS process parameters and temperature gradient across the processed TE materials.

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Authors and Affiliations

  1. Department of Applied Science and Technology, Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129, Turin, Italy

    Giovanni Maizza & Gioacchino Dario Mastrorillo

  2. School of Engineering and Materials Science, Queen Mary University of London, London, E1 4NS, UK

    Salvatore Grasso, Huanpo Ning & Michael J. Reece

Authors
  1. Giovanni Maizza
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  2. Gioacchino Dario Mastrorillo
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  3. Salvatore Grasso
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  4. Huanpo Ning
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  5. Michael J. Reece
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Correspondence to Giovanni Maizza.

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Maizza, G., Mastrorillo, G.D., Grasso, S. et al. Peltier effect during spark plasma sintering (SPS) of thermoelectric materials. J Mater Sci 52, 10341–10352 (2017). https://doi.org/10.1007/s10853-017-1188-1

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  • DOI: https://doi.org/10.1007/s10853-017-1188-1

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