Improvement of thermoelectric properties of β-FeSi2 by the addition of Ta2O5

被引：7

作者：

Morikawa, Kentarou ^{[1
]}

Chikauchi, Hiroyuki ^{[1
]}

Mizoguchi, Hiroyuki ^{[1
]}

Sugihara, Sunao ^{[1
]}

机构：

[1] Shonan Inst Technol, Dept Mat Sci & Cerma Technol, Fujisawa, Kanagawa 2518511, Japan

来源：

MATERIALS TRANSACTIONS | 2007年 / 48卷 / 08期

关键词：

iron silicide; tantalum oxide; Seebeck coefficient; electrical resistivity; thermal conductivity; figure of merit; oxide addition; beta-phase;

D O I：

10.2320/matertrans.E-MRA2007860

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Our goal is the improvement of the thermoelectric properties for FeSi2, We investigated the improvement of thermoelectric properties, that is, the increase of the power factor and the decrease in the thermal conductivity to add Ta2O5. The thermal conductivity of specimens with 1 mass% and 3 mass% of additive decreased to half in comparison with the sample without additive, because phonon scattering was enhanced as a result of an increase in the number of pores in the samples by the influence of Ta2O5. The figure of merit for sample with 1 mass% and 3 mass% of additive were higher than that for the sample without additive. The highest performance of the sample with I mass% of additive was 2.5 x 10(-4) K-1 similar to 2.8 x 10(-4) K-1 around 700 K and its dimensionless figure of merit was 0.2 at 700 K.

引用

页码：2100 / 2103

页数：4

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