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Influence of Al and Mg addition on thermoelectric properties of higher manganese silicides obtained by reactive sintering
KTH, School of Engineering Sciences (SCI), Applied Physics.ORCID iD: 0000-0001-5380-975X
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2017 (English)In: Journal of Nanoscience and Nanotechnology, ISSN 1533-4880, E-ISSN 1533-4899, Vol. 17, no 3, p. 1668-1673Article in journal (Refereed) Published
Abstract [en]

Higher manganese silicides (HMS), represented by MnSix (x = 1.71-1.75), are promising p-type candidates for thermoelectric (TE) energy harvesting systems at intermediate temperature range. The materials are very attractive as they may replace lead based compounds due to their non-toxicity, low cost of starting materials, and high thermal and chemical stability. Dense pellets were obtained through fast reactive sintering by spark plasma sintering (SPS). The addition -or nanoinclusion, of Al and Mg permitted the figure of merit enhancement of the material obtained with this technique, reaching the highest value of 0.40 at 600°C. Morphology, composition and crystal structure of the samples were characterized by electron microscopies, energy dispersive X-ray spectroscopy, and X-ray diffraction analyses, respectively.

Place, publisher, year, edition, pages
American Scientific Publishers, 2017. Vol. 17, no 3, p. 1668-1673
Keywords [en]
Manganese silicide, Reactive sintering, SPS, Thermoelectricity
National Category
Nano Technology
Identifiers
URN: urn:nbn:se:kth:diva-200976Scopus ID: 2-s2.0-85009999876OAI: oai:DiVA.org:kth-200976DiVA, id: diva2:1072665
Note

QC 20170208

Available from: 2017-02-08 Created: 2017-02-07 Last updated: 2017-11-29Bibliographically approved

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