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Fabrication of nanostructured bulk cobalt antimonide (CoSb3) based skutterudites via bottom-up synthesis
KTH, School of Information and Communication Technology (ICT), Materials- and Nano Physics, Functional Materials, FNM.ORCID iD: 0000-0001-5380-975X
KTH, School of Information and Communication Technology (ICT), Materials- and Nano Physics, Functional Materials, FNM.ORCID iD: 0000-0003-0855-5265
KTH, School of Information and Communication Technology (ICT), Materials- and Nano Physics, Functional Materials, FNM.ORCID iD: 0000-0001-5678-5298
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2013 (English)In: Thermoelectric Materials Research and Device Development for Power Conversion and Refrigeration: symposium held November 25-30, 2012, Boston, Mass., Materials Research Society, 2013, 121-126 p.Conference paper, Published paper (Refereed)
Abstract [en]

Skutterudites are known to be efficient thermoelectric (TE) materials in the temperature range from 600 K to 900 K. Dimensionless figure of merit (ZT) for filled skutterudite TE materials have been reported as ca. 1 at 800 K. Novel nano- engineering approaches and filling of the skutterudites crystal can further improve the transport properties and ultimately the ZT. Although classified among the promising TE materials, research on their large-scale production via bottom up synthetic routes is rather limited. In this work, large quantity of cobalt antimonide (CoSb3) based skutterudites nanopowder (NP) was fabricated through a room temperature coprecipitation precursor method. Dried precipitates were process by thermo-chemical treatment steps including calcination (in air) and reduction (in hydrogen). CoSb3 NPs were then mixed with silver (Ag) nanopanicles at different weight percentages (1%, 5% and 10% by wt) to form nanocomposites. Skutterudite NP was then consolidated by Spark Plasma Sintering (SPS) technique to produce highly dense compacts while maintaining the nanostructure. Temperature dependent TE characteristics of SPS'd CoSb3 and Ag containing nanocomposite samples were evaluated for transport properties, including thermal conductivity, electrical conductivity and Seebeck coefficient over the temperature range of 300-900 K. Physicochemical, structural and microstructural evaluation results are presented in detail.

Place, publisher, year, edition, pages
Materials Research Society, 2013. 121-126 p.
Series
Materials Research Society Symposium Proceedings, ISSN 0272-9172 ; 1490
Keyword [en]
Bottom up synthesis, Cobalt antimonide, Nanostructured, Skutterudite, Spark plasma sintering, Thermoelectric
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:kth:diva-139903DOI: 10.1557/opl.2012.1643Scopus ID: 2-s2.0-84888069689ISBN: 978-160511467-5 (print)OAI: oai:DiVA.org:kth-139903DiVA: diva2:688264
Conference
2012 MRS Fall Meeting; Boston, MA; United States; 25 November 2012 through 30 November 2012
Note

QC 20140116

Available from: 2014-01-16 Created: 2014-01-15 Last updated: 2014-01-16Bibliographically approved

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Saleemi, MohsinYakhshi Tafti, MohsenToprak, Muhammet S.

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