Ruttanapun, Chesta

Loading...
Thumbnail Image
Preferred name
Ruttanapun, Chesta
Alternative Name
Ruttanapun, C.
Main Affiliation
Email
chesta.ru@kmitl.ac.th

Settings

Now showing 1 - 1 of 1
  • Loading...
    Thumbnail Image
    Some of the metrics are blocked by your 
    consent settings
    Item type:Publication,
    Thermoelectric properties of Sn2+-substituted CuFeO2 delafossite-oxide
    (2013-10-29)
    Ruttanapun, Chesta
    ;
    Jindajitawat, Phumin
    ;
    Thowladda, Warawoot
    ;
    Neeyakorn, Worakarn
    ;
    Thanachayanont, Chanchana
    This study aims to investigate the effect of the Sn<sup>2+</sup>-substituted into the CuFeO<inf>2</inf> delafossite on thermoelectric properties in the Sn content of x = 0.03, 0.05. The CuFe<inf>1-x</inf>Sn<inf>x</inf>O<inf>2</inf> samples were synthesized by solid state reaction. The crystal structure was characterized by XRD, TGA, XPS and the thermoelectric properties were measured in the range of 300 to 960 K. The Seebeck coefficient display positive sign in all temperature range and the XPS show the stable Sn<sup>+2</sup> state as confirming the Sn-doped CuFeO<inf>2</inf> playing p-type conductor. The Sn<sup>2+</sup>-substituted supports the mixed valency Fe<sup>3+</sup>/Fe<sup>4+</sup> state in transition octahedral oxide of FeO<inf>6</inf> layer enhancing Seebeck coefficient. The high Seebeck are appeared in content of x=0.03 which are 280 to 340 μV/K in the range of 300 to 800 K. The experimental Seebeck corresponds to the prediction formula at high temperature. Totally, the maximum Power Factor is 2.30×10<sup>-4</sup> W/mK<sup>2</sup> occurring in the CuFe<inf>0.95</inf>Sn<inf>0.05</inf>O<inf>2</inf> at 860 K which is higher than that value of the undoped-CuFeO<inf>2</inf> in 4 times. These support that the Sn-substituted CuFeO<inf>2</inf> delafossite enhancing thermoelectric properties. © (2013) Trans Tech Publications, Switzerland.