Polycrystalline samples of Ca1-xBixMnO3 (0.02 ≤ x ≤ 0.20) were studied by means of x-ray diffraction, electrical resistivity (ρ), thermoelectric power (S), and thermal conductivity (κ) at high temperature. Bi doping leads to the lattice parameters a, b, and c increasing. And the ρ and the absolute value of S decrease rapidly with Bi doping. The largest power factor, S2/ρ, is obtained in the x = 0.04 sample, which is 3.6×10−4 Wm−1 K−2 at 400 K. The figures of merit (Z = S2/ρκ) for this sample and 1.0×10−4 and 0.86 × 10−4 K−1 at 600 and 1000 K, respectively.
通过 X 射线衍射、电阻率 (ρ)、热电功率 (S) 和高温下的热导率 (κ),对 Ca1-xBixMnO3(0.02 ≤ x ≤ 0.20)的多晶样品进行了研究。掺杂铋会导致晶格参数 a、b 和 c 增加。随着铋的掺入,ρ和 S 的绝对值迅速降低。x = 0.04 样品的功率因数 S2/ρ 最大,在 400 K 时为 3.6×10-4 Wm-1 K-2;在 600 K 和 1000 K 时,该样品的优点系数(Z = S2/ρκ)分别为 1.0×10-4 和 0.86 × 10-4 K-1。