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首页> 外文期刊>RSC Advances >Enhanced thermoelectric properties of hydrothermally synthesized Bi0.88?xZnxSb0.12 nanoalloys below the semiconductor–semimetal transition temperature
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Enhanced thermoelectric properties of hydrothermally synthesized Bi0.88?xZnxSb0.12 nanoalloys below the semiconductor–semimetal transition temperature

机译：在半导体-半金属转变温度以下水热合成的Bi0.88？xZnxSb0.12纳米合金的增强的热电性能

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摘要

Bi _(0.88? x ) Zn _( x ) Sb _(0.12) alloys with x = 0.00, 0.05, 0.10, and 0.15 were prepared using hydrothermal synthesis in combination with evacuating-and-encapsulating sintering. The effects of partial Zn substitution for Bi and different sintering temperatures on the thermoelectric properties of Bi _(0.88? x ) Zn _( x ) Sb _(0.12) alloys were investigated between 25 K and 425 K. Both the electrical conductivity and absolute thermopower are enhanced for the set of alloys sintered at 250 °C. The maximum power factor of 57.60 μW cm ~(?1) K ~(?2) is attained for the x = 0.05 alloy sintered at 250 °C. As compared with Zn-free Bi _(0.88) Sb _(0.12) , both the total thermal conductivity and lattice component are reduced upon Zn doping. Bipolar conduction is observed in both electronic and thermal transport. The maximum zT of 0.47 is attained at 275 K for the x = 0.05 alloy sintered at 250 °C.
机译：利用水热合成结合抽真空和包封烧结法制备x = 0.00、0.05、0.10和0.15的Bi_（0.88？x）Zn_（x）Sb_（0.12）合金。研究了在25 K和425 K之间Bi的部分Zn替代Bi和不同的烧结温度对Bi _（0.88？x）Zn _（x）Sb _（0.12）合金热电性能的影响。电导率和绝对值在250°C下烧结的一组合金的热功率得到了增强。对于在250°C烧结的x = 0.05合金，可获得57.60μWcm〜（？1）K〜（？2）的最大功率因数。与无锌Bi _（0.88）Sb _（0.12）相比，Zn掺杂后总热导率和晶格成分均降低。在电子和热传输中都观察到双极传导。对于在250°C烧结的x = 0.05合金，在275 K时最大zT为0.47。

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