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Analysis of nanostructuring in high figure-of-merit Ag{sub 1-x}Pb{sub m}SbTe{sub 2+m} thermoelectric materials

Abstract

Thermoelectric materials based on quaternary compounds Ag{sub 1-x}Pb{sub m}SbTe{sub 2+m} exhibit high dimensionless figure-of-merit values, ranging from 1.5 to 1.7 at 700 K. The primary factor contributing to the high figure of merit is a low lattice thermal conductivity, achieved through nanostructuring during melt solidification. As a consequence of nucleation and growth of a second phase, coherent nanoscale inclusions form throughout the material, which are believed to result in scattering of acoustic phonons while causing only minimal scattering of charge carriers. Here, characterization of the nanosized inclusions in Ag{sub 0.53}Pb{sub 18}Sb{sub 1.2}Te{sub 20} that shows a strong tendency for crystallographic orientation along the {l_brace}001{r_brace} planes, with a high degree of lattice strain at the interface, consistent with a coherent interfacial boundary is reported. The inclusions are enriched in Ag relative to the matrix, and seem to adopt a cubic, 96 atom per unit cell Ag{sub 2}Te phase based on the Ti{sub 2}Ni type structure. In-situ high-temperature synchrotron radiation diffraction studies indicated that the inclusions remain thermally stable to at least 800 K. (Abstract Copyright [2009], Wiley Periodicals, Inc.)
Authors:
Cook, Bruce A; Harringa, Joel L; [1]  Kramer, Matthew J; [2]  Han, Mi-Kyung; [3]  Chung, Duck-Young; [4]  Kanatzidis, Mercouri G; [3]  Material Science Division, Argonne National Laboratory, IL (United States)]
  1. Materials and Engineering Physics Program, Ames Laboratory, Iowa State University Ames, IA (United States)
  2. Materials Science and Engineering, Iowa State University Ames, IA (United States)
  3. Department of Chemistry, Northwestern University Evanston, IL (United States)
  4. Material Science Division, Argonne National Laboratory, IL (United States)
Publication Date:
Apr 23, 2009
Product Type:
Journal Article
Resource Relation:
Journal Name: Advanced Functional Materials; Journal Volume: 19; Journal Issue: 8; Other Information: With 4 figs., 0 tabs., 32 refs.; SICI: 1616-301X(20090423)19:8<1254::AID-ADFM200801284>3.0.TX;2-P
Subject:
36 MATERIALS SCIENCE; PERFORMANCE; THERMOELECTRIC MATERIALS; SILVER ALLOYS; LEAD ALLOYS; ANTIMONY ALLOYS; TERBIUM ALLOYS; NANOSTRUCTURES; DIFFRACTION
OSTI ID:
21197331
Country of Origin:
Germany
Language:
English
Other Identifying Numbers:
Journal ID: ISSN 1616-301X; TRN: DE09G8595
Availability:
Available from: http://dx.doi.org/10.1002/adfm.200801284
Submitting Site:
DE
Size:
page(s) 1254-1259
Announcement Date:
Aug 19, 2009

Citation Formats

Cook, Bruce A, Harringa, Joel L, Kramer, Matthew J, Han, Mi-Kyung, Chung, Duck-Young, Kanatzidis, Mercouri G, and Material Science Division, Argonne National Laboratory, IL (United States)]. Analysis of nanostructuring in high figure-of-merit Ag{sub 1-x}Pb{sub m}SbTe{sub 2+m} thermoelectric materials. Germany: N. p., 2009. Web. doi:10.1002/ADFM.200801284.
Cook, Bruce A, Harringa, Joel L, Kramer, Matthew J, Han, Mi-Kyung, Chung, Duck-Young, Kanatzidis, Mercouri G, & Material Science Division, Argonne National Laboratory, IL (United States)]. Analysis of nanostructuring in high figure-of-merit Ag{sub 1-x}Pb{sub m}SbTe{sub 2+m} thermoelectric materials. Germany. doi:10.1002/ADFM.200801284.
Cook, Bruce A, Harringa, Joel L, Kramer, Matthew J, Han, Mi-Kyung, Chung, Duck-Young, Kanatzidis, Mercouri G, and Material Science Division, Argonne National Laboratory, IL (United States)]. 2009. "Analysis of nanostructuring in high figure-of-merit Ag{sub 1-x}Pb{sub m}SbTe{sub 2+m} thermoelectric materials." Germany. doi:10.1002/ADFM.200801284. https://www.osti.gov/servlets/purl/10.1002/ADFM.200801284.
@misc{etde_21197331,
title = {Analysis of nanostructuring in high figure-of-merit Ag{sub 1-x}Pb{sub m}SbTe{sub 2+m} thermoelectric materials}
author = {Cook, Bruce A, Harringa, Joel L, Kramer, Matthew J, Han, Mi-Kyung, Chung, Duck-Young, Kanatzidis, Mercouri G, and Material Science Division, Argonne National Laboratory, IL (United States)]}
abstractNote = {Thermoelectric materials based on quaternary compounds Ag{sub 1-x}Pb{sub m}SbTe{sub 2+m} exhibit high dimensionless figure-of-merit values, ranging from 1.5 to 1.7 at 700 K. The primary factor contributing to the high figure of merit is a low lattice thermal conductivity, achieved through nanostructuring during melt solidification. As a consequence of nucleation and growth of a second phase, coherent nanoscale inclusions form throughout the material, which are believed to result in scattering of acoustic phonons while causing only minimal scattering of charge carriers. Here, characterization of the nanosized inclusions in Ag{sub 0.53}Pb{sub 18}Sb{sub 1.2}Te{sub 20} that shows a strong tendency for crystallographic orientation along the {l_brace}001{r_brace} planes, with a high degree of lattice strain at the interface, consistent with a coherent interfacial boundary is reported. The inclusions are enriched in Ag relative to the matrix, and seem to adopt a cubic, 96 atom per unit cell Ag{sub 2}Te phase based on the Ti{sub 2}Ni type structure. In-situ high-temperature synchrotron radiation diffraction studies indicated that the inclusions remain thermally stable to at least 800 K. (Abstract Copyright [2009], Wiley Periodicals, Inc.)}
doi = {10.1002/ADFM.200801284}
journal = {Advanced Functional Materials}
issue = {8}
volume = {19}
place = {Germany}
year = {2009}
month = {Apr}
}