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http://dx.doi.org/10.5762/KAIS.2013.14.4.1883

The Effect of Particle Size and Additives on the Thermoelectric Properties of P-type FeSi2  

Pai, Chul-Hoon (Division of Bio-Engineering, Incheon National University)
Publication Information
Journal of the Korea Academia-Industrial cooperation Society / v.14, no.4, 2013 , pp. 1883-1889 More about this Journal
Abstract
Although Fe-Si based alloy has lower figure of merit than Si-Ge alloy applied for space probe, its low cost related to abundant raw material, rather simple processing, high temperature resistance and reliability up to $800^{\circ}C$ made it one of the most promising middle temperature thermoelectric generation materials. The effect of particle size and additive on the thermoelectric properties of p-$FeSi_2$ prepared by a RF inductive furnace was investigated. The electrical conductivity increased slightly with decreasing particle size and hence better grain-to-grain connectivity due to the increase of density. The Seebeck coefficient exhibited the maximum value at about 600~800K and decreased slightly with increasing particle size. This must be due to the amount of residual metallic phase ${\varepsilon}$-FeSi. $Fe_2O_3$ and/or $Fe_3O_4$-doped specimens showed the higher electrical conductivity and the lower Seebeck coefficient due to increase of the metallic phase and Si-vacancy. On the other hand, $SiO_2$-doped specimen showed the higher electrical conductivity and the higher Seebeck coefficients.
Keywords
Additives; Electrical conductivity; Mn-doped FeSi2; Particle size; Seebeck coefficient;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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