Fabrication parameters for optimized thermoelectric Mg2Si

被引：33

作者：

de Boor, J. ^{[1
]}

Compere, C. ^{[1
]}

Dasgupta, T. ^{[1
]}

Stiewe, C. ^{[1
]}

Kolb, H. ^{[1
]}

Schmitz, A. ^{[1
]}

Mueller, E. ^{[1
,2
]}

机构：

[1] German Aerosp Ctr, Inst Mat Res, D-51147 Cologne, Germany

[2] Univ Giessen, Inst Inorgan & Analyt Chem, D-35392 Giessen, Germany

来源：

JOURNAL OF MATERIALS SCIENCE | 2014年 / 49卷 / 08期

关键词：

THERMAL-CONDUCTIVITY; TEMPERATURE;

D O I：

10.1007/s10853-014-8023-8

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Here, we report on the effect of sintering temperature, particle size, and sintering pressure on the thermoelectric properties of Sb-doped Mg2Si samples. We find a strong dependence of thermoelectric performance on sintering temperature with the best properties achieved at 900 A degrees C. We furthermore show a strong influence of the particle size of the employed powder, with coarser powder giving better properties. The difference stems mainly from the electrical conductivity; Seebeck coefficient and thermal conductivity are affected to a lesser extent. With respect to sintering pressure, a small positive influence of increasing pressure is found. We obtain a peak thermoelectric figure of merit of 0.75 +/- A 0.18 at 820 K employing optimized fabrication parameters.

引用

页码：3196 / 3204

页数：9

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