ENHANCEMENT of THERMOELECTRIC PROPERTIES by Na and Y SUBSTITUTION into CaMnO3

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Çetin G., Ergin İ., Gürsul M., Özçelik B., Sotelo A., Madre M. A.

WESC 2022, İstanbul, Türkiye, 18 - 21 Aralık 2022, ss.9-11

  • Yayın Türü: Bildiri / Tam Metin Bildiri
  • Basıldığı Şehir: İstanbul
  • Basıldığı Ülke: Türkiye
  • Sayfa Sayıları: ss.9-11
  • Çukurova Üniversitesi Adresli: Evet

Özet

This work addresses the main themes of today, such as reliable, sustainable and clean energy. Within this objective, Ca1-x(Na0.5Y0.5)xMnO3 (x = 0.0, 0.05, 0.10, 0.15 and 0.20) thermoelectric materials have been produced by solid state reaction technique. X-Ray diffraction analysis has been revealed similar patterns corresponding to the thermoelectric phase for all sintered samples. From FESEM, it seems that grain sizes decrease and the porosity increases in general by co-doping of Na and Y. Electrical resistivity values of all Na and Y containing samples are smaller than the pure one. The Seebeck coefficient values of all samples are negative for all temperature ranges confirming the conduction mechanism mainly governed by electrons. The maximum power factor value is obtained in x=0.05 Na and Y containing sample as 0.25 mw/K2m at around 800°C.