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Title: Synthesis, characterization and physical properties of the skutterudites Yb{sub x}Fe{sub 2}Ni{sub 2}Sb{sub 12} (0{<=}x{<=}0.4)

Abstract

The skutterudites Yb{sub x}Fe{sub 2}Ni{sub 2}Sb{sub 12} (0{<=}x{<=}0.4) have been prepared by solid-state reaction and characterised by powder X-ray diffraction. The compounds crystallise in the cubic space group Im3{sup Macron} (a Almost-Equal-To 9.1 A) with Yb atoms partially filling the voids in the skutterudite framework. A neutron time-of-flight diffraction experiment for Fe{sub 2}Ni{sub 2}Sb{sub 12} confirms the disorder of Fe and Ni atoms on the transition-metal site. Electrical resistivity, Seebeck coefficient and thermal conductivity measurements indicate that the thermoelectric performance of the skutterudites shows a marked dependence on the Yb content. Magnetic measurements over the temperature range 2{<=}T/K{<=}300 show paramagnetic behaviour for all compounds. Decomposition studies under an oxidising atmosphere at elevated temperatures have also been carried out by thermogravimetric analysis. - Graphical abstract: The filled skutterudites Yb{sub x}Fe{sub 2}Ni{sub 2}Sb{sub 12} have been prepared by solid-state reaction and characterised by powder X-ray diffraction. The thermoelectric performance depends strongly on the Yb content. The physical properties and thermal stability of the compounds are further discussed in comparison with the current state-of-the art thermoelectric skutterudites. Highlights: Black-Right-Pointing-Pointer A new series of skutterudites has been prepared and characterised. Black-Right-Pointing-Pointer Physical properties are affected by the degree of Yb filling. Black-Right-Pointing-Pointer The highestmore » thermoelectric performance is found for Yb{sub 0.15}Fe{sub 2}Ni{sub 2}Sb{sub 12}. Black-Right-Pointing-Pointer The skutterudites decompose in air above 550 K.« less

Authors:
;  [1];  [2]
  1. Department of Chemistry, Heriot-Watt University, Edinburgh EH14 4AS (United Kingdom)
  2. ISIS Facility, Rutherford Appleton Laboratory, Didcot, Oxfordshire OX11 0OX (United Kingdom)
Publication Date:
OSTI Identifier:
22149797
Resource Type:
Journal Article
Journal Name:
Journal of Solid State Chemistry
Additional Journal Information:
Journal Volume: 193; 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:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; 36 MATERIALS SCIENCE; CHEMICAL PREPARATION; DECOMPOSITION; ELECTRIC CONDUCTIVITY; MAGNETIC PROPERTIES; POWDERS; SOLIDS; SPACE GROUPS; THERMAL CONDUCTIVITY; THERMAL GRAVIMETRIC ANALYSIS; THERMOELECTRIC PROPERTIES; TRANSITION ELEMENTS; X-RAY DIFFRACTION

Citation Formats

Kaltzoglou, Andreas, Vaqueiro, Paz, Knight, Kevin S., and Powell, Anthony V., E-mail: a.v.powell@hw.ac.uk. Synthesis, characterization and physical properties of the skutterudites Yb{sub x}Fe{sub 2}Ni{sub 2}Sb{sub 12} (0{<=}x{<=}0.4). United States: N. p., 2012. Web. doi:10.1016/J.JSSC.2012.03.041.
Kaltzoglou, Andreas, Vaqueiro, Paz, Knight, Kevin S., & Powell, Anthony V., E-mail: a.v.powell@hw.ac.uk. Synthesis, characterization and physical properties of the skutterudites Yb{sub x}Fe{sub 2}Ni{sub 2}Sb{sub 12} (0{<=}x{<=}0.4). United States. https://doi.org/10.1016/J.JSSC.2012.03.041
Kaltzoglou, Andreas, Vaqueiro, Paz, Knight, Kevin S., and Powell, Anthony V., E-mail: a.v.powell@hw.ac.uk. Sat . "Synthesis, characterization and physical properties of the skutterudites Yb{sub x}Fe{sub 2}Ni{sub 2}Sb{sub 12} (0{<=}x{<=}0.4)". United States. https://doi.org/10.1016/J.JSSC.2012.03.041.
@article{osti_22149797,
title = {Synthesis, characterization and physical properties of the skutterudites Yb{sub x}Fe{sub 2}Ni{sub 2}Sb{sub 12} (0{<=}x{<=}0.4)},
author = {Kaltzoglou, Andreas and Vaqueiro, Paz and Knight, Kevin S. and Powell, Anthony V., E-mail: a.v.powell@hw.ac.uk},
abstractNote = {The skutterudites Yb{sub x}Fe{sub 2}Ni{sub 2}Sb{sub 12} (0{<=}x{<=}0.4) have been prepared by solid-state reaction and characterised by powder X-ray diffraction. The compounds crystallise in the cubic space group Im3{sup Macron} (a Almost-Equal-To 9.1 A) with Yb atoms partially filling the voids in the skutterudite framework. A neutron time-of-flight diffraction experiment for Fe{sub 2}Ni{sub 2}Sb{sub 12} confirms the disorder of Fe and Ni atoms on the transition-metal site. Electrical resistivity, Seebeck coefficient and thermal conductivity measurements indicate that the thermoelectric performance of the skutterudites shows a marked dependence on the Yb content. Magnetic measurements over the temperature range 2{<=}T/K{<=}300 show paramagnetic behaviour for all compounds. Decomposition studies under an oxidising atmosphere at elevated temperatures have also been carried out by thermogravimetric analysis. - Graphical abstract: The filled skutterudites Yb{sub x}Fe{sub 2}Ni{sub 2}Sb{sub 12} have been prepared by solid-state reaction and characterised by powder X-ray diffraction. The thermoelectric performance depends strongly on the Yb content. The physical properties and thermal stability of the compounds are further discussed in comparison with the current state-of-the art thermoelectric skutterudites. Highlights: Black-Right-Pointing-Pointer A new series of skutterudites has been prepared and characterised. Black-Right-Pointing-Pointer Physical properties are affected by the degree of Yb filling. Black-Right-Pointing-Pointer The highest thermoelectric performance is found for Yb{sub 0.15}Fe{sub 2}Ni{sub 2}Sb{sub 12}. Black-Right-Pointing-Pointer The skutterudites decompose in air above 550 K.},
doi = {10.1016/J.JSSC.2012.03.041},
url = {https://www.osti.gov/biblio/22149797}, journal = {Journal of Solid State Chemistry},
issn = {0022-4596},
number = ,
volume = 193,
place = {United States},
year = {2012},
month = {9}
}