Synthesis and characterization of Ge-Ag-Sb-S-Se-Te high-entropy thermoelectric alloys

被引：1
|
作者：
Yang, Min-Jung [1 ]
Fakhri, Muhammad Yusuf [2 ]
Liao, Chien-Neng [1 ]
Chen, Kuei-Hsien [2 ]
机构：
[1] Natl Tsing Hua Univ, Dept Mat Sci & Engn, Hsinchu 30013, Taiwan
[2] Acad Sinica, Inst Atom & Mol Sci, Taipei 10617, Taiwan
来源：
MATERIALS LETTERS | 2022年 / 311卷
关键词：
Phase transformation; Thermal properties; Functional; High-entropy alloy; Lattice distortion; THERMAL-CONDUCTIVITY; PERFORMANCE; CONVERGENCE; STABILITY;
D O I：
10.1016/j.matlet.2021.131617
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Multielement alloying is an appealing approach for suppressing thermal conductivity of thermoelectric materials. In this study, we synthesized GeTe-based high-entropy alloys with notable (S, Se) substitution at Te sites and (Ag, Sb) at Ge sites. The Ge0.82Ag0.08Sb0.1S0.5Se0.1Te0.4 exhibits an extremely low thermal conductivity of similar to 0.66 W/m.K and a high Seebeck coefficient (>250 mu V/K) over a temperature range of 150 - 400 degrees C. The influence of lattice distortion on phase transformation and transport properties of Ge0.9-2xAg2xSb0.1S0.5Se0.1Te0.4 (x = 0 - 0.06) was investigated.
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页数：3
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