Optimization of thermoelectric properties of n-type Mn-and Te-doped Mg3Sb2-xBix phases

被引：0

作者：

Phan, Trong ^{[1
]}

Tseng, Yu-Chih ^{[2
]}

Mozharivskyj, Yurij ^{[1
]}

机构：

[1] McMaster Univ, Dept Chem & Chem Biol, Hamilton, ON, Canada

[2] Nat Resources Canada, CanmetMATERIALS, Hamilton, ON, Canada

来源：

SOLID STATE SCIENCES | 2025年 / 168卷

基金：

加拿大自然科学与工程研究理事会;

关键词：

Magnesium antimonide; Magnesium bismuthide; Thermoelectric properties; Stability; CARRIER SCATTERING MECHANISM; ZINTL COMPOUNDS; WASTE HEAT; PERFORMANCE; POWER; SB;

D O I：

10.1016/j.solidstatesciences.2025.108011

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

This study explores the effects of Mg and Bi amounts, ball milling duration, and sintering conditions on the purity and thermoelectric properties of the Mn- and Te-doped Mg3Sb2-xBix phases (Mg2.97+yMn0.03BixSb1.99-xTe0.01). We found that excess Mg is necessary to achieve phase pure samples, but too much Mg forms impurities that decrease thermoelectric efficiency. Increasing Bi content leads to lower phase stability and decomposition. There is also an optimal ball milling time, beyond which decomposition of the material occurs. The highest figure of merit, zT, of 1.44 was achieved for the Mg3.27Mn0.03Bi1.30Sb0.69Te0.01 sample at 623K, which is comparable to the performance of Bi2Te3. Our findings suggest that Mg3Sb2-xBix phases are promising low-cost and environmentally friendly thermoelectric materials mid-range temperature applications.

引用

页数：7

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