Thermoelectric Properties of Mn-Ni Substituted Magnetite

Hajime Ozaki; Yoshihisa Nakada; Natsuteru Koseki; Akira Sato; Yasushi Oikawa; Kimitoshi Inoue; Yasunobu Beppu; Yukio Nakano; Akira Usami; Kazuyuki Tanaka

doi:10.1541/ieejfms.124.319

Special Issue Letter

Thermoelectric Properties of Mn-Ni Substituted Magnetite

Hajime Ozaki, Yoshihisa Nakada, Natsuteru Koseki, Akira Sato, Yasushi Oikawa, Kimitoshi Inoue, Yasunobu Beppu, Yukio Nakano, Akira Usami, Kazuyuki Tanaka

Author information

Hajime Ozaki
Dept. of Electrical Engineering and Bio-Science, Waseda University
Yoshihisa Nakada
Dept. of Electrical Engineering and Bio-Science, Waseda University
Natsuteru Koseki
Dept. of Electrical Engineering and Bio-Science, Waseda University
Akira Sato
Dept. of Electrical Engineering and Bio-Science, Waseda University
Yasushi Oikawa
Dept. of Electrical Engineering and Bio-Science, Waseda University
Kimitoshi Inoue
Kyusyu Electric Power Co., Inc., Research Lab.
Yasunobu Beppu
Kyusyu Electric Power Co., Inc., Research Lab.
Yukio Nakano
Komae Reseach Lab., Central Reseach Institute of Electric Power Industry
Akira Usami
Komae Reseach Lab., Central Reseach Institute of Electric Power Industry
Kazuyuki Tanaka
Komae Reseach Lab., Central Reseach Institute of Electric Power Industry

Keywords: magnetite, Mn, Ni, substitution, minority-spin, thermoelectricity

JOURNAL FREE ACCESS

2004 Volume 124 Issue 4 Pages 319-320

DOI https://doi.org/10.1541/ieejfms.124.319

Details

Abstract

The thermoelectric properties of Mn and Ni substituted sintered magnetite (Mn_2/3Ni_1/3)_xFe_3-xO₄ were investigated for x=0, 0.4, 0.8 and 1.2 in the temperature range 100-700°C. It was found that the grain boundary didn’t affect the electrical conduction notably in this material. The thermoelectric power factor increased with increasing the temperature for each x, and marked a maximum value of 1.31 μW/K²cm for x=0.4 at 700°C.

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