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Thermoelectric properties of AgSbO 3 with defect pyrochlore structure

The thermoelectric oxide AgSbO has been prepared by the conventional solid state reaction (CSSR) method combined with spark plasma sintering (SPS) technique. The electrical resistivity and the Seebeck coefficient were measured simultaneously from 323 to 873 K. It was found that decreased monotonical... Full description

Journal Title: Journal of Alloys and Compounds 2010, Vol.493(1), pp.678-682
Main Author: Sang, Hong-Yi
Other Authors: Li, Jing-Feng
Format: Electronic Article Electronic Article
Language: English
Subjects:
ID: ISSN: 0925-8388 ; E-ISSN: 1873-4669 ; DOI: 10.1016/j.jallcom.2009.12.190
Link: https://www.sciencedirect.com/science/article/pii/S0925838810000046
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recordid: elsevier_sdoi_10_1016_j_jallcom_2009_12_190
title: Thermoelectric properties of AgSbO 3 with defect pyrochlore structure
format: Article
creator:
  • Sang, Hong-Yi
  • Li, Jing-Feng
subjects:
  • Thermoelectric Oxide
  • Agsbo 3
  • Engineering
  • Chemistry
  • Physics
ispartof: Journal of Alloys and Compounds, 2010, Vol.493(1), pp.678-682
description: The thermoelectric oxide AgSbO has been prepared by the conventional solid state reaction (CSSR) method combined with spark plasma sintering (SPS) technique. The electrical resistivity and the Seebeck coefficient were measured simultaneously from 323 to 873 K. It was found that decreased monotonically from 3.75 to 7.20 × 10 Ω m as the temperature was increased. The highest absolute value of the Seebeck coefficient | | ( < 0) reached 209 μV K at 873 K. In addition to the large thermopower, a rather low thermal conductivity of 0.825 W m K at 873 K has been observed. Better thermoelectric performance at higher temperatures may origin from the change in hybridization of the Ag 4d–O 2p orbital and the Ag 5s–Sb 5s orbital, which are responsible for engineering energy positions and shapes of the valence-band (VB) top and the conduction band (CB) bottom, respectively.
language: eng
source:
identifier: ISSN: 0925-8388 ; E-ISSN: 1873-4669 ; DOI: 10.1016/j.jallcom.2009.12.190
fulltext: fulltext
issn:
  • 0925-8388
  • 09258388
  • 1873-4669
  • 18734669
url: Link


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subjectThermoelectric Oxide ; Agsbo 3 ; Engineering ; Chemistry ; Physics
descriptionThe thermoelectric oxide AgSbO has been prepared by the conventional solid state reaction (CSSR) method combined with spark plasma sintering (SPS) technique. The electrical resistivity and the Seebeck coefficient were measured simultaneously from 323 to 873 K. It was found that decreased monotonically from 3.75 to 7.20 × 10 Ω m as the temperature was increased. The highest absolute value of the Seebeck coefficient | | ( < 0) reached 209 μV K at 873 K. In addition to the large thermopower, a rather low thermal conductivity of 0.825 W m K at 873 K has been observed. Better thermoelectric performance at higher temperatures may origin from the change in hybridization of the Ag 4d–O 2p orbital and the Ag 5s–Sb 5s orbital, which are responsible for engineering energy positions and shapes of the valence-band (VB) top and the conduction band (CB) bottom, respectively.
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