Abstract
For medium temperature applications, magnesium silicide stannide and manganese silicide (HMS) are considered as the most promising thermoelectric materials. The scale-up of these materials was performed by gas phase atomization for powder production, followed by Spark Plasma Sintering process in a pre-industrial scale technological platform for thermoelectrics “PAMIRE” (Grenoble, France). Kilograms batches of thermoelectric powder were processed, leading to the production of a large quantity of homogenous 60 mm diameter silicide pellets.
The development of high performance materials was obtained by a deep investigation on the relation between thermoelectric properties and material microstructure. During the synthesis process nano/micrometric precipitates were formed. TEM analysis and thermoelectric measurements were systematically correlated. The figure of merit of the produced material reaches ZTmax of 1.4 and 0.54 for n-type and p-type materials respectively.
Moreover, promising assembly processes for thermoelectric modules were initiated. The performances of first silicide modules produced by CEA-LITEN thermoelectric lab were measured on a specific bench, in conditions representative of applications (temperature and heat flux).
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Navone, C. et al. (2015). Process Scalability for Promising Si Based Thermoelectric Materials. In: TMS 2015 144th Annual Meeting & Exhibition. Springer, Cham. https://doi.org/10.1007/978-3-319-48127-2_76
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DOI: https://doi.org/10.1007/978-3-319-48127-2_76
Publisher Name: Springer, Cham
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