[21a-W323-1~10] 9.4 Thermoelectric conversion

△ [21a-W323-6] Synthesis and thermoelectyric properties of CrSi₂ via soft-chemical technique

〇Hayato Nakasawa¹, Tomohisa Takamatsu¹, Yoshihiko Iijima², Kei Hayashi¹, Yuzuru Miyazaki¹ (1.Tohoku Univ., 2.RICOH COMPANY)

Keywords:Soft-chemical,silicide,CrSi2

Silicides are promising thermoelectric materials due to the abundance and less toxicity of the elements. In particular, CrSi₂ has high power factor, high melting point, and high oxidation resistance. However, its dimensionless figure of merit ZT is not high for practical use because the thermal conductivity is high. In this study, we prepared CrSi₂ fine powder via soft chemical technique using metal hydrides to enhance ZT. By sintering the fine powder, grain boundaries is expected to increase in the sintered CrSi₂, leading to reduce the thermal conductivity.