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Chemical Synthesis of Iron Antimonide (FeSb2) and Its Thermoelectric Properties
Stockholm University, Faculty of Science, Department of Materials and Environmental Chemistry (MMK). KTH-Royal Institute of Technology, Sweden.
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Number of Authors: 6
2016 (English)In: Inorganic Chemistry, ISSN 0020-1669, E-ISSN 1520-510X, Vol. 55, no 4, 1831-1836 p.Article in journal (Refereed) Published
Abstract [en]

Low temperature thermoelectric (TE) materials are in demand for more efficient cooling and power generation applications. Iron antimonide (FeSb2) draws great attention over the past few years because of its enhanced power factor values. Polycrystalline bulk FeSb2 nanopowder was prepared via a low-temperature molten salts approach followed by subsequent thermal treatment in synthetic air and hydrogen gas for calcination and reduction reactions, respectively. Structural analysis confirms the desired final phase with submicrometer grain size and high compaction density after consolidation using spark plasma sintering (SPS). TE transport properties revealed that the material is n-type below 150 K and p-type above this temperature; this suggests antimony vacancies in FeSb2. The electrical conductivity increased significantly, and the highest conductivity achieved was 6000 S/cm at 100 K. The maximum figure-of-merit, ZT, of 0.04 is achieved at 500 K, which is about 6 times higher than the earlier reported state-of-the art ZT value for the same material.

Place, publisher, year, edition, pages
2016. Vol. 55, no 4, 1831-1836 p.
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Chemical Sciences
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URN: urn:nbn:se:su:diva-128551DOI: 10.1021/acs.inorgchem.5b02658ISI: 000370395000055PubMedID: 26836130OAI: oai:DiVA.org:su-128551DiVA: diva2:939863
Available from: 2016-06-20 Created: 2016-03-30 Last updated: 2016-06-20Bibliographically approved

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Saleemi, MohsinJohnsson, Mats
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