• thermoelectric properties of the entire composition range in mg2si0.9925−x sn x sb0.0075

    جزئیات بیشتر مقاله
    • تاریخ ارائه: 1392/07/24
    • تاریخ انتشار در تی پی بین: 1392/07/24
    • تعداد بازدید: 804
    • تعداد پرسش و پاسخ ها: 0
    • شماره تماس دبیرخانه رویداد: -
      eleven samples of nominal composition mg2.2si0.9925−x sn x sb0.0075 with x = 0, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 0.9925 were prepared by induction melting, ball milling, and spark plasma sintering. hall effect, resistivity, seebeck coefficient, and thermal conductivity measurements were conducted from room temperature to 400°c. six of the samples were investigated for thermal stability by measuring powder x-ray diffraction while heating to 400°c. all samples were stable in air during the ∼12-h-long data collection, except for mg2.2sn0.9925sb0.0075, which showed development of an elemental sn phase after heating. the lattice parameter of each sample was extracted through rietveld refinement and revealed a linear dependency on nominal composition. measurement of top and bottom of the pellets exhibited systematic differences in lattice parameter and seebeck coefficient, indicating that stoichiometry gradients are created during sintering.

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