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Author: search.filters.author.Boonyopakorn, NarongchaiSubject: search.filters.subject.Thermoelectric

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    Item type:Publication,
    High temperature thermoelectric properties of delafossite CuBO2
    (2014-01-01)
    Ruttanapun, Chesta
    ;
    Jindajitawat, Phumin
    ;
    Buranasiri, Prathan
    ;
    Thowladda, Warawoot
    ;
    Neeyakorn, Worakarn
    CuBO<inf>2</inf> is prepared by a solid-state reaction method to investigate thermoelectric properties in high temperature. The XRD result confirms the CuBO<inf>2</inf> compound existing in this method. The Seebeck reveals the compound displays p-type thermoelectric material. The experimental results of electrical resistivity exhibited results of 0.004 S/cm to 0.038 S/cm with the temperature range of 650 to 830 K. The Seebeck value is in the range of 450 μV/K to 950 μV/K, and the thermal conductivity is in the range of 1.4 × 10<sup>-5</sup> to 5.3 × 10<sup>-5</sup> W/m-K<sup>2</sup> with the same temperature. The maximum PF and ZT is 5.3 × 10<sup>-5</sup> W/m-K<sup>2</sup> and 0.0016, respectively, at 960 K. This work demonstrates that the CuBO<inf>2</inf> delafossite-oxide compound displays the p-type thermoelectric materials. © 2014 IEEE.
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    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.