Journal
ACTA MATERIALIA
Volume 60, Issue 5, Pages 2178-2185Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.actamat.2011.12.028
Keywords
Nanocomposites; Nanomaterials; Nanostructured materials; Semiconductors; Thermal conductivity
Funding
- National Science Foundation [DMR-0804167]
- Oregon Nanoscience Microtechnologies Institute
- Direct For Mathematical & Physical Scien
- Division Of Chemistry [0947094] Funding Source: National Science Foundation
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [804167] Funding Source: National Science Foundation
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The synthesis and thermoelectric properties of In0.1-xCo4Sb12-x, skutterudite-based nanocomposites with xInSb nanoinclusions are reported. The nanoinclusions reduce the thermal conductivity of the composites considerably compared with nanoinclusion-free In0.1Co4Sb12. Unequivocal evidence is provided demonstrating that the InSb nanoinclusions found in some of the highest reported thermoelectric figure of merit (ZT) skutterudites are synthesized in situ from filler atoms diffusing out of the icosahedral void-sites, and the kinetics of their synthesis is enhanced strongly by mechanical attrition. Moreover, a procedure designed to maximize the concentration of InSb nanoinclusions is reported, and can be employed to create void-site-filled and optimally doped skutterudite-based InSb-nanocomposites with exceptional ZT. (C) 2011 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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