High temperature thermoelectric properties of delafossite-type oxides CuFe0.98M0.02O2 (M=Mg, Zn, Ni, Co, Mn, or Ti)

Tomohiro Nozaki, Kei Hayashi, T. Kajitani

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Citations (Scopus)

Abstract

We have measured the electrical conductivity σ and Seebeck coefficient S of CuFe0.98M0.02O2 (M=Mg, Zn, Ni, Co, Mn, or Ti) at high temperatures. The highest electrical conductivity of 30 S/cm was obtained with the Mg-doped sample above 600 K. The Seebeck coefficient of the doped samples were still high (higher than 210 μV/K). The maximum power factor P=σS2=4.1×10-4 W/mK2 at 1150 K was obtained with CuFe0.98Mg0.02O2. The above results were well explained in terms of the valence states and ionic radii of the dopants. The chemical stability of the doped samples was discussed by measuring the temperature dependent power factor during the repeated cycles of heating and cooling processes.

Original languageEnglish
Title of host publicationProceedings ICT'07 - 26th International Conference on Thermoelectrics
Pages167-170
Number of pages4
DOIs
Publication statusPublished - 2007 Dec 1
EventICT'07 - 26th International Conference on Thermoelectrics - Jeju, Korea, Republic of
Duration: 2007 Jun 32007 Jun 7

Publication series

NameInternational Conference on Thermoelectrics, ICT, Proceedings

Other

OtherICT'07 - 26th International Conference on Thermoelectrics
CountryKorea, Republic of
CityJeju
Period07/6/307/6/7

ASJC Scopus subject areas

  • Engineering(all)

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  • Cite this

    Nozaki, T., Hayashi, K., & Kajitani, T. (2007). High temperature thermoelectric properties of delafossite-type oxides CuFe0.98M0.02O2 (M=Mg, Zn, Ni, Co, Mn, or Ti). In Proceedings ICT'07 - 26th International Conference on Thermoelectrics (pp. 167-170). [4569449] (International Conference on Thermoelectrics, ICT, Proceedings). https://doi.org/10.1109/ICT.2007.4569449