Thermoelectric properties of nonstoichiometric Ag1－xPb18SbTe20 materials | Zendy

YAN Yonggao | Zendy; Xinfeng Tang | Zendy; Haijun Liu | Zendy; Yin Ling-Ling | Zendy; Qingjie Zhang | Zendy

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Thermoelectric properties of nonstoichiometric Ag1－xPb18SbTe20 materials

Author(s) -

YAN Yonggao,

Xinfeng Tang,

Haijun Liu,

Yin Ling-Ling,

Qingjie Zhang

Publication year - 2007

Publication title -

acta physica sinica

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.199

H-Index - 47

ISSN - 1000-3290

DOI - 10.7498/aps.56.3473

Subject(s) - spark plasma sintering , materials science , seebeck coefficient , thermoelectric effect , impurity , electrical resistivity and conductivity , scattering , thermal conductivity , phonon scattering , analytical chemistry (journal) , thermoelectric materials , sintering , electron mobility , phase (matter) , composite material , optoelectronics , optics , chemistry , thermodynamics , physics , organic chemistry , chromatography , electrical engineering , engineering

Ag1-xPb18SbTe20(x00.250.50.75) samples were prepared by melt-quench-spark plasma sintering(SPS). As the Ag content decreased, a second phase Sb2Te3 occurred in samples and the carrier concentration increased to 5×1018cm-3 and then ceased to increase as Ag content decreased further. The carrier mobility decreased first, and then increased, as the Ag content decreased. As temperature increased, the carrier scattering mechanism shifted gradually from ionized impurity scattering to acoustic phonon scattering. As the Ag content decreased, the electric conductivity increased while the Seebeck coefficient decreased, and the thermal conductivity show an increasing trend.

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