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首页> 外文期刊>Japanese Journal of Applied Physics. Part 1, Regular Papers & Short Notes >Thermal Properties for Hot-Pressed n-type (Bi_(1-x)Sb_x)_2Te_3 Alloys
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Thermal Properties for Hot-Pressed n-type (Bi_(1-x)Sb_x)_2Te_3 Alloys

机译：n型（Bi_（1-x）Sb_x）_2Te_3合金的热压性能

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摘要

We have measured the thermal properties of an n-type hot-pressed Bi_(1.8)Sb_(0.2)Te_3 alloy with a carrier concentration of 3.1 x 10~(19)cm~(-3). With the adjustable parameters determined from these experimental data, the dependence of thermal properties on the carrier concentrations is investigated, using the two-band-conduction model with a mixed scattering mechanism and a small fluctuation theory. The maximum dimensionless figures of merit of the alloy in a carrier concentration range of 0.8-3 x 10~(19)cm~(-3) have values over 0.7 at temperatures between 250 K and 300 K and a minimum thermal conductivity of 1 W/Km. These alloys are comparable to single crystals, showing the possibility that they provide higher thermoelectric performance than the single crystals, since their microstructure can be controlled by hot-press processing.
机译：我们已经测量了载流子浓度为3.1 x 10〜（19）cm〜（-3）的n型热压Bi_（1.8）Sb_（0.2）Te_3合金的热性能。根据这些实验数据确定的可调参数，使用具有混合散射机制和小波动理论的双频带传导模型，研究了热性质对载流子浓度的依赖性。载流子浓度范围为0.8-3 x 10〜（19）cm〜（-3）时，合金的最大无量纲品质因数在250 K至300 K之间的温度下具有超过0.7的值，且最小导热系数为1 W /公里这些合金可与单晶媲美，这表明它们具有比单晶更高的热电性能的可能性，因为它们的微观结构可以通过热压工艺来控制。

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