Abstract
The thermoelectric oxide AgSbO 3 has been prepared by the conventional solid state reaction (CSSR) method combined with spark plasma sintering (SPS) technique. The electrical resistivity ρ and the Seebeck coefficient S were measured simultaneously from 323 to 873 K. It was found that ρ decreased monotonically from 3.75 to 7.20 × 10 −4 Ω m as the temperature was increased. The highest absolute value of the Seebeck coefficient | S| ( S < 0) reached 209 μV K −1 at 873 K. In addition to the large thermopower, a rather low thermal conductivity of 0.825 W m −1 K −1 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.
Published Version
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