Thermoelectric properties of BaSi2, SrSi2, and LaSi

被引：51

作者：

Hashimoto, Kohsuke ^{[1
]}

Kurosaki, Ken ^{[1
]}

Imamura, Yasushi ^{[1
]}

Muta, Hiroaki ^{[1
]}

Yamanaka, Shinsuke ^{[1
]}

机构：

[1] Osaka Univ, Grad Sch Engn, Div Sustainable Energy & Environm Engn, Suita, Osaka 5650871, Japan

来源：

JOURNAL OF APPLIED PHYSICS | 2007年 / 102卷 / 06期

关键词：

D O I：

10.1063/1.2778747

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We studied the thermoelectric properties of BaSi2, SrSi2, and LaSi. The polycrystalline samples were prepared by spark plasma sintering (SPS). The electrical resistivity (rho), Seebeck coefficient (S), and thermal conductivity (kappa) were measured above room temperature. The power factor (S-2/rho) is quite low (below 10(-5) Wm(-1) K-2 over the whole temperature range) for BaSi2 and LaSi, while relatively high (1.19x10(-3) Wm(-1) K-2 at 331 K) for SrSi2. BaSi2 exhibits quite low kappa. The kappa values at room temperature are 1.56, 5.25, and 6.71 Wm(-1) K-1 for BaSi2, SrSi2, and LaSi, respectively. The maximum values of the dimensionless figure of merit, ZT=(ST)-T-2/rho/kappa, are 0.01 at 954 K for BaSi2, 0.09 at 417 K for SrSi2, and 0.002 at 957 K for LaSi.

引用

页数：5

共 15 条

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