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Author: search.filters.author.Charoenphakdee, AnekSubject: search.filters.subject.Delafossite

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    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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    Thermoelectric properties of Cu1-xPtxFeO2 (0.0 ≤ x ≤ 0.05) delafossite-type transition oxide
    (2011-03-31)
    Ruttanapun, Chesta
    ;
    Wichainchai, Aree
    ;
    Prachamon, Wutthisak
    ;
    Yangthaisong, Anucha
    ;
    Charoenphakdee, Anek
    The samples of Cu<inf>1-x</inf>Pt<inf>x</inf>FeO<inf>2</inf> (0 ≤ x ≤ 0.05) delafossite were synthesized by solid state reaction method for studying thermoelectric properties. The properties of Seebeck coefficient, electrical conductivity and thermal conductivity were measured in the high temperature ranging from 300 to 960 K. The results of Seebeck coefficient, electrical conductivity and power factor were increased with increasing Pt substitution and temperature. The thermal conductivity was decreased from 5.8 to 3.5 W/mK with increasing the temperature from 300 to 960 K. An important results, the highest value of power factor and ZT is 2.0 × 10<sup>-4</sup> W/mK<sup>2</sup> and 0.05, respectively, for x = 0.05 at 960 K. © 2011 Elsevier B.V. All rights reserved.