Fabrication and characterization of nanostructured bulk skutterudites
2013 (English)In: 2013 MRS Spring Meeting - Symposium H/I/V – Nanoscale Thermoelectric Materials, Thermal and Electrical Transport, and Applications to Solid-State Cooling and Power Generation, Materials Research Society, 2013, 105-110 p.Conference paper (Refereed)
Latest nanotechnology concepts applied in thermoelectric (TE) research have opened many new avenues to improve the ZT value. Low dimensional structures can improve the ZT value as compared to bulk materials by substantial reduction in the lattice thermal conductivity, κL. However, the materials were not feasible for the industrial scale production of macroscopic devices because of complicated and costly manufacturing processes involved. Bulk nanostructured (NS) TEs are normally fabricated using a bulk process rather than a nano- fabrication process, which has the important advantage of producing in large quantities and in a form that is compatible with commercially available TE devices. We developed fabrication strategies for bulk nanostructured skutterudite materials based on FexCo1-xSb3. The process is based on precipitation of a precursor material with the desired metal atom composition, which is then exposed to thermochemical processing of calcination followed by reduction. The resultant material thus formed maintains nanostructured particles which are then compacted using Spark Plasma Sintering (SPS) by utilizing previously optimized process parameters. Microstructure, crystallinity, phase composition, thermal stability and temperature dependent transport property evaluation has been performed for compacted NS Fe xCo1-xSb3. Evaluation results are presented in detail, suggesting the feasibility of devised strategy for bulk quantities of doped TE nanopowder fabrication.
Place, publisher, year, edition, pages
Materials Research Society, 2013. 105-110 p.
, Materials Research Society Symposium Proceedings, ISSN 0272-9172 ; 1543
Fabrication and characterizations, Fabrication strategies, Industrial-scale production, Lattice thermal conductivity, Low dimensional structure, Nanostructured particles, Skutterudite materials, Thermochemical processing
Engineering and Technology
IdentifiersURN: urn:nbn:se:kth:diva-143308DOI: 10.1557/opl.2013.947ScopusID: 2-s2.0-84893404121ISBN: 978-160511520-7OAI: oai:DiVA.org:kth-143308DiVA: diva2:706442
2013 MRS Spring Meeting; San Francisco, CA; United States; 1 April 2013 through 5 April 2013
QC 201403202014-03-202014-03-192016-05-03Bibliographically approved