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Author: search.filters.author.Charoenphakdee, AnekSubject: search.filters.subject.Seebeck coefficient

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    Item type:Publication,
    Reinvestigation thermoelectric properties of CuAlO2
    (2014-01-01)
    Ruttanapun, Chesta
    ;
    Kosalwat, Wattana
    ;
    Rudradawong, Chalermpol
    ;
    Jindajitawat, Phumin
    ;
    Buranasiri, Prathan
    Bulk CuAlO2 delafossite has been synthesized by solid state reaction to reinvestigate the thermoelectric properties. The electrical conductivity, Seebeck coefficient and thermal conductivity were measured in a high temperature range of 300 to 960 K. The result of positive sign of Seebeck coefficient confirms p-type nature of CuAlO2 compund. The results of bulk sample for Seebeck coefficient, the electrical conductivity and thermal conductivity are range of 900 to 300 μV/K, of 0.01 to 2 S/cm, and of 3.5 W/mK to 1.5 W/mK. The maximum ZT value of bulk sample is 0.017 at a 960 K. These results can be concluded that the bulk CuAlO2 by solid state state displays thermoelelctric material.
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    Item type:Publication,
    Reinvestigation the thermal and electrical transport properties of Tl7Sb2
    (2013-10-29)
    Charoenphakdee, Anek
    ;
    Harnwunggmoung, Adul
    ;
    Seetawan, Tosawat
    ;
    Rattanapun, Chesta
    ;
    Amornkitbamrung, Vittaya
    The authors examined the thermal and electrical transport properties of Tl<inf>7</inf>Sb<inf>2</inf> at temperatures ranging from room temperature to 400 K. The crystal system of Tl<inf>7</inf>Sb<inf>2</inf> is cubic with the lattice parameter a = 1.16053 nm and the space group is Im3m. The polycrystalline samples were prepared by melting stoichiometric amounts of thallium and antimony. Although, usually the thermal conductivity of thallium compounds is very low (<1 Wm<sup>-1</sup>K<sup>-1</sup>), that of Tl<inf>7</inf>Sb<inf>2</inf> was relatively high (~13 Wm<sup>-1</sup>K<sup>-1</sup> at room temperature). This is because of the large electronic contribution to the thermal conductivity. © (2013) Trans Tech Publications, Switzerland.