Evaluation of thermoelectric properties of soil clay minerals towards fabrication of thermoelectric material

Honda, Mitsunori   ; Kaneta, Yui ; Muraguchi, Masakazu*; Hayakawa, Kosetsu*; Oda, Masato*; Iino, Chiaki*; Ishii, Hiroyuki*; Goto, Takuya*; Yaita, Tsuyoshi

Ten years have passed since the Great East Japan Earthquake and the accident at the Fukushima Daiichi Nuclear Power Plant, and the contaminated soil generated in Fukushima Prefecture has been decontaminated and managed as removal soil. We have been conducting research on the volume reduction and recycling of Fukushima weathered biotite, which is known to be a strong adsorbent of radioactive Cs contained in the removed soil. In this study, thermoelectric properties (Seebeck coefficient, electrical conductivity, and thermal diffusivity) of soil clay minerals and molten salt-electrolyzed soil clay minerals were evaluated in order to clarify their properties as thermoelectric materials.