水热合成的Bi-Zn-Sb纳米合金在半导体-半金属转变温度以下的热电性能增强

Enhanced thermoelectric properties of hydrothermally synthesized Bi Zn Sb nanoalloys below the semiconductor-semimetal transition temperature.

作者信息

Gharleghi Ahmad, Hung Roy-Hung, Yang Zong-Ren, Malekfar Rasoul, Liu Chia-Jyi

机构信息

Department of Physics, National Changhua University of Education Changhua 500 Taiwan

Department of Physics, Faculty of Basic Science, Tarbiat Modares University Tehran I. R. Iran.

出版信息

RSC Adv. 2018 Jun 6;8(37):20764-20772. doi: 10.1039/c8ra03858a. eCollection 2018 Jun 5.

DOI:10.1039/c8ra03858a

PMID:35542381

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9080874/

Abstract

Bi Zn Sb alloys with = 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 Zn Sb 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 K is attained for the = 0.05 alloy sintered at 250 °C. As compared with Zn-free BiSb, 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 of 0.47 is attained at 275 K for the = 0.05 alloy sintered at 250 °C.

摘要

采用水热合成结合抽空封装烧结法制备了锌含量（x）分别为0.00、0.05、0.10和0.15的铋锌锑合金。研究了部分锌替代铋以及不同烧结温度对铋锌锑合金在25 K至425 K温度范围内热电性能的影响。在250°C烧结的这组合金的电导率和绝对热功率均有所提高。在250°C烧结的x = 0.05合金的最大功率因数达到57.60 μW cm⁻¹ K⁻²。与无锌的铋锑合金相比，锌掺杂后总热导率和晶格热导率均降低。在电子和热输运中均观察到双极传导。在250°C烧结的x = 0.05合金在275 K时达到最大热电优值0.47。