Abstract
Polycrystalline bulk β-FeSi2 was prepared by heating a compact body of Fe powder in a Na–Si melt at 1173 K for 24 h. The relative density of the bulk sample was 78% of the theoretical density of β-FeSi2. Mn-doped and Co-doped bulk samples were also prepared from compact bodies of Fe powder mixed with Mn and Co powders. The Seebeck coefficients measured for the Mn- and Co-doped samples in the temperature range between 400 and 1000 K were +125 to +270 µV/K and -120 to -180 µV/K, respectively.
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