skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Electrical and thermal properties of Fe substituted double-filled Ba{sub x}Yb{sub y}Fe{sub z}Co{sub 4-z}Sb{sub 12} skutterudites

Abstract

Fe-substituted double-filled Ba{sub x}Yb{sub y}Fe{sub z}Co{sub 4-z}Sb{sub 12} (x=0.1, y=0.2 and z=0.0-0.4 nominal) compounds were synthesized using a melting-annealing-spark plasma sintering (SPS) method. Their thermoelectric properties were assessed by measuring the Seebeck coefficient, electrical conductivity, thermal conductivity and the Hall coefficient. The sign of the Hall coefficient indicates that electrons are the dominant carriers in all compounds except Ba{sub 0.1}Yb{sub 0.2}Fe{sub 0.4}Co{sub 3.6}Sb{sub 12}. The temperature dependence of the electrical conductivity and the carrier concentration reflect the transition from extrinsic to intrinsic behavior depending on the amount of Fe substituted for Co. Jonker and Ioffe analyses are applied to Fe-substituted double-filled Ba{sub x}Yb{sub y}Fe{sub z}Co{sub 4-z}Sb{sub 12} compounds in order to evaluate the range of minimum and maximum power factors achievable in n-type filled skutterudite compounds at room temperature (300 K). The predicted maximum room temperature power factor values in the range of 15-45 {mu}W/K{sup 2} cm are comparable to experimentally reported values of n-type skutterudite compounds. - Graphical abstract: Room temperature Jonker plot of Ba{sub x}Yb{sub y}Fe{sub z}Co{sub 4-z}Sb{sub 12} samples. Highlights: Black-Right-Pointing-Pointer The TE properties of Ba{sub x}Yb{sub y}Fe{sub z}Co{sub 4-z}Sb{sub 12} compounds were investigated. Black-Right-Pointing-Pointer Jonker and Ioffe analysis applied in order to predict the range ofmore » power factor achievable at room temperature. Black-Right-Pointing-Pointer The thermal conductivity is strongly suppressed with increasing of Fe substitution on Co site. Black-Right-Pointing-Pointer We see that small quantities of Fe on Co site is beneficial on enhancement ZT value.« less

Authors:
 [1]; ;  [1];  [2]
  1. Department of Physics, University of Istanbul, 34134 Vezneciler, Istanbul (Turkey)
  2. Chemical Sciences and Materials Systems Laboratory, General Motors Global R and D Center, Warren, MI 48090 (United States)
Publication Date:
OSTI Identifier:
22131210
Resource Type:
Journal Article
Journal Name:
Journal of Solid State Chemistry
Additional Journal Information:
Journal Volume: 197; Other Information: Copyright (c) 2012 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0022-4596
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ELECTRIC CONDUCTIVITY; MELTING; POWER FACTOR; SINTERING; TEMPERATURE DEPENDENCE; TEMPERATURE RANGE 0273-0400 K; THERMAL CONDUCTIVITY; THERMOELECTRIC PROPERTIES

Citation Formats

Ballikaya, Sedat, Uzar, Neslihan, Yildirim, Saffettin, and Salvador, James R. Electrical and thermal properties of Fe substituted double-filled Ba{sub x}Yb{sub y}Fe{sub z}Co{sub 4-z}Sb{sub 12} skutterudites. United States: N. p., 2013. Web. doi:10.1016/J.JSSC.2012.08.025.
Ballikaya, Sedat, Uzar, Neslihan, Yildirim, Saffettin, & Salvador, James R. Electrical and thermal properties of Fe substituted double-filled Ba{sub x}Yb{sub y}Fe{sub z}Co{sub 4-z}Sb{sub 12} skutterudites. United States. https://doi.org/10.1016/J.JSSC.2012.08.025
Ballikaya, Sedat, Uzar, Neslihan, Yildirim, Saffettin, and Salvador, James R. Tue . "Electrical and thermal properties of Fe substituted double-filled Ba{sub x}Yb{sub y}Fe{sub z}Co{sub 4-z}Sb{sub 12} skutterudites". United States. https://doi.org/10.1016/J.JSSC.2012.08.025.
@article{osti_22131210,
title = {Electrical and thermal properties of Fe substituted double-filled Ba{sub x}Yb{sub y}Fe{sub z}Co{sub 4-z}Sb{sub 12} skutterudites},
author = {Ballikaya, Sedat and Uzar, Neslihan and Yildirim, Saffettin and Salvador, James R.},
abstractNote = {Fe-substituted double-filled Ba{sub x}Yb{sub y}Fe{sub z}Co{sub 4-z}Sb{sub 12} (x=0.1, y=0.2 and z=0.0-0.4 nominal) compounds were synthesized using a melting-annealing-spark plasma sintering (SPS) method. Their thermoelectric properties were assessed by measuring the Seebeck coefficient, electrical conductivity, thermal conductivity and the Hall coefficient. The sign of the Hall coefficient indicates that electrons are the dominant carriers in all compounds except Ba{sub 0.1}Yb{sub 0.2}Fe{sub 0.4}Co{sub 3.6}Sb{sub 12}. The temperature dependence of the electrical conductivity and the carrier concentration reflect the transition from extrinsic to intrinsic behavior depending on the amount of Fe substituted for Co. Jonker and Ioffe analyses are applied to Fe-substituted double-filled Ba{sub x}Yb{sub y}Fe{sub z}Co{sub 4-z}Sb{sub 12} compounds in order to evaluate the range of minimum and maximum power factors achievable in n-type filled skutterudite compounds at room temperature (300 K). The predicted maximum room temperature power factor values in the range of 15-45 {mu}W/K{sup 2} cm are comparable to experimentally reported values of n-type skutterudite compounds. - Graphical abstract: Room temperature Jonker plot of Ba{sub x}Yb{sub y}Fe{sub z}Co{sub 4-z}Sb{sub 12} samples. Highlights: Black-Right-Pointing-Pointer The TE properties of Ba{sub x}Yb{sub y}Fe{sub z}Co{sub 4-z}Sb{sub 12} compounds were investigated. Black-Right-Pointing-Pointer Jonker and Ioffe analysis applied in order to predict the range of power factor achievable at room temperature. Black-Right-Pointing-Pointer The thermal conductivity is strongly suppressed with increasing of Fe substitution on Co site. Black-Right-Pointing-Pointer We see that small quantities of Fe on Co site is beneficial on enhancement ZT value.},
doi = {10.1016/J.JSSC.2012.08.025},
url = {https://www.osti.gov/biblio/22131210}, journal = {Journal of Solid State Chemistry},
issn = {0022-4596},
number = ,
volume = 197,
place = {United States},
year = {2013},
month = {1}
}