Effects of Zr substitution on phase transformation and thermoelectric properties of β-FeSi2

摘要: Zr-substituted β-FeSi2 thermoelectric materials, Fe1−xZrxSi2, were synthesized by mechanical alloying (MA) and subsequent hot pressing, the effects of Zr substitution on phase transformation properties investigated. The samples with x up to 0.06 mostly composed Zr-doped β small amounts e ZrSi phase. In case an value over 0.10, formation a large amount α was observed in x-ray diffraction patterns, completely disappeared for sample x=0.30. Seebeck coefficient below 900 K markedly reduced substitution. However, effective enhancing above reducing electrical resistivity entire temperature range. dependence high content showed metallic behavior, which well consistent ...