Thermoelectric properties of p-type Si-rich higher manganese silicide for mid-temperature applications

被引：9

作者：

Saminathan, Madhuvathani ^{[1
]}

Palraj, Jothilal ^{[1
]}

Wesley, Prince ^{[2
]}

Moorthy, Manojkumar ^{[1
]}

Ravikirana ^{[2
]}

Perumal, Suresh ^{[1
]}

机构：

[1] SRM Inst Sci & Technol, Dept Phys & Nanotechnol, Lab Energy & Adv Devices LEAD, Chengalpattu 603203, Tamil Nadu, India

[2] SRM Inst Sci & Technol, Dept Phys & Nanotechnol, High Temp Mat Proc Lab, Chengalpattu 603203, Tamil Nadu, India

来源：

MATERIALS LETTERS | 2021年 / 302卷

关键词：

Thermoelectrics; Higher manganese silicide; Seebeck coefficient; Figure of merit; THERMAL-CONDUCTIVITY; PERFORMANCE; MN; AL;

D O I：

10.1016/j.matlet.2021.130444

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

High density pellets of MnSi1.74, MnSi1.8 and MnSi1.9 were prepared by an induction-melting and a rapid induction hot-pressing. Presence of fine precipitations of metallic MnSi in MnSi1.74 and Si in both MnSi1.8 and MnSi1.9 were confirmed by means of X-ray diffraction, SEM and EDS analysis. With subsequent increase in Si content in HMS, the electrical conductivity gradually decreases and Seebeck coefficient significantly increases. Further, the total thermal conductivity was notably reduced to -2.1 W/mK at 725 K for MnSi1.8 which resulted in the enhanced zT of -0.35 at 773 K.

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页数：4

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