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Oxidation Protective Hybrid Coating for Thermoelectric Materials

1
School of Engineering and Material Science, Queen Mary University of London, London E1 4NS, UK
2
Nanoforce Technology Limited, London E1 4NS, UK
3
Department of Applied Science and Technology, Politecnico di Torino, 10129 Turin, Italy
4
Department of Energy, Politecnico di Torino, 10129 Turin, Italy
*
Author to whom correspondence should be addressed.
Materials 2019, 12(4), 573; https://doi.org/10.3390/ma12040573
Received: 14 December 2018 / Revised: 28 January 2019 / Accepted: 6 February 2019 / Published: 14 February 2019
(This article belongs to the Special Issue Advanced Glasses, Composites and Ceramics for High Growth Industries)
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Abstract

Two commercial hybrid coatings, cured at temperatures lower than 300 °C, were successfully used to protect magnesium silicide stannide and zinc-doped tetrahedrite thermoelectrics. The oxidation rate of magnesium silicide at 500 °C in air was substantially reduced after 120 h with the application of the solvent-based coating and a slight increase in power factor was observed. The water-based coating was effective in preventing an increase in electrical resistivity for a coated tethtraedrite, preserving its power factor after 48 h at 350 °C. View Full-Text
Keywords: Thermoelectrics; oxidation resistance; hybrid-coating Thermoelectrics; oxidation resistance; hybrid-coating
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Gucci, F.; D’Isanto, F.; Zhang, R.; Reece, M.J.; Smeacetto, F.; Salvo, M. Oxidation Protective Hybrid Coating for Thermoelectric Materials. Materials 2019, 12, 573.

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