Bi1?x CuSeO + x Fe ( x = 0, 0.01, 0.02, 0.04, 0.06, 0.08, 0.1, and 0.12) ceramics have been prepared by mechanical alloying and resistance pressing sintering process, and the synergistic effects of Bi Deficiencies and magnetic Fe doping on the thermoelectric properties and hardness of BiCuSeO ceramics have been investigated in detail. The results indicate that the band gap of the doped sample has narrowed down, which could be confirmed by the infrared absorption spectra. This leads to the dramatical increase of carrier concentration. The corresponding electrical conductivity increases significantly. The Seebeck coefficient decreases, but maintains high values in the high temperature zone. The maximum power factor of 0.38 m Wm?1 K?2 and ZT of 0.76 were obtained for the Bi0.92CuSeO + 8% Fe sample at 873 K, which was ～1.4 and ～1.3 times as that of the pristine BiCuSeO. The hardness of pristine BiCuSeO is up to 200.0 HV, and increases greatly with the increase of x for solid solution strengthening.
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机译：通过机械合金化制备Bi 1？ x CuSeO + x Fe（x = 0、0.01、0.02、0.04、0.06、0.08、0.1和0.12）陶瓷，并详细研究了电阻压烧结工艺，Bi缺陷和Fe掺杂对BiCuSeO陶瓷热电性能和硬度的协同作用。结果表明，掺杂样品的带隙变窄，这可以通过红外吸收光谱证实。这导致载流子浓度急剧增加。相应的电导率显着增加。塞贝克系数减小，但是在高温区域中保持较高的值。 Bi 0.92 CuSeO + 8％Fe样品的最大功率因数为0.38 m Wm ？1 K ？2 和ZT为0.76 873 K，是原始BiCuSeO的约1.4和1.3倍。原始BiCuSeO的硬度高达200.0 HV，并且随着x的增加而大大增加，以增强固溶体。
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