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Development and evolution of nanostructure in bulk thermoelectric Pb-Te-Sb alloys

Ikeda, Teruyuki and Ravi, Vilupanur A. and Collins, Lauren A. and Haile, Sossina M. and Snyder, G. Jeffrey (2007) Development and evolution of nanostructure in bulk thermoelectric Pb-Te-Sb alloys. Journal of Electronic Materials, 36 (7). pp. 716-720. ISSN 0361-5235. https://resolver.caltech.edu/CaltechAUTHORS:20131125-162533045

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Abstract

Motivated by reports of exceptionally high zT > 2 in thin film superlattices or "quantum well" materials with nanometer sized features, we have undertaken a study of composite materials with nanoscale features that promise to provide similar structures in bulk material. Nanometer scale layers of PbTe and Sb_2Te_3 with periodicities of 180 nm to 950 nm form when quenched eutectic PbTe-Sb_2Te_3 melt, crystallizing as Pb_2Sb_6Te_(11), subsequently annealed. The lamellar spacing depends on the temperature and time of the anneal. The mechanism for the development of the nanostructures is probed by examining the fraction of material transformed as a function of anneal time. Preliminary analysis of the shape factor exponent reveals that the transformation to the nanostructured lamellae bears similarities to the thickening of very large plates. The coarsening of the lamellar spacing is also examined as a function of time and temperature.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1007/s11664-007-0175-8DOIArticle
https://rdcu.be/bPMlWPublisherFree ReadCube access
ORCID:
AuthorORCID
Ikeda, Teruyuki0000-0001-7076-6958
Haile, Sossina M.0000-0002-5293-6252
Snyder, G. Jeffrey0000-0003-1414-8682
Additional Information:© 2007 TMS. (Received October 14, 2006; accepted March 16, 2007; published online June 29, 2007) This work was supported by the Office of Naval Research. LC was supported by the SURF program at Caltech.
Funders:
Funding AgencyGrant Number
Office of Naval Research (ONR)UNSPECIFIED
Caltech Summer Undergraduate Research Fellowship (SURF)UNSPECIFIED
Subject Keywords:thermoelectric lamellar spacing fraction transformed coarsening ELEVATED TEMPERATURES PHASE-CHANGE KINETICS DEVICES
Issue or Number:7
Record Number:CaltechAUTHORS:20131125-162533045
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20131125-162533045
Official Citation:Ikeda, T., Ravi, V.A., Collins, L.A. et al. Journal of Elec Materi (2007) 36: 716. https://doi.org/10.1007/s11664-007-0175-8
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:42725
Collection:CaltechAUTHORS
Deposited By: Jonathan Gross
Deposited On:02 Dec 2013 22:53
Last Modified:03 Oct 2019 06:01

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