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首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >Thermoelectric properties of the Co-doped beta-FeSi_2 mixed with Ag
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Thermoelectric properties of the Co-doped beta-FeSi_2 mixed with Ag

机译：掺银的共掺杂β-FeSi_2的热电性能

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摘要

The Co-doped beta-FeSi_2 ingots, ribbons, or discs, which were mixed with Ag, were fabricated by conventional melting and cooling, spin-casting, or powdering and sintering. The microstructures and thermoelectric properties were investigated by using a transmission electron microscope, an energy dispersion X-ray micro-analyzer and measuring the Seebeck coefficient, electrical conductivity.The Ag phase was observed at the grain boundaries and the matrix of the beta phase in the ingots, ribbons, discs. Ag was detected not to dissolve in the lattice of the beta phase. The Seebeck coefficient decreases nonlinearly with increasing the amount of Ag. The Seebeck coefficient is large in the ribbon with the small amount of Ag. The electrical conductivity increases nonlinearly with increasing the amount of Ag. The electrical conductivity is large in the discs. The power factor reaches to a maximum and then decreases with increasing the amount of Ag. Mixing with Ag in the Co-doped beta-FeSi_2 is effective to improve the power factor of the discs.
机译：通过传统的熔化和冷却，旋转铸造或粉末和烧结来制造与Ag混合的Co掺杂的β-FeSi_2锭，带或盘。用透射电子显微镜，能量色散X射线显微分析仪测量塞贝克系数，电导率，研究了金相的微观结构和热电性能，在晶界和β相的基体中观察到了Ag相。锭，色带，光盘。检测到Ag不溶解在β相的晶格中。塞贝克系数随着Ag含量的增加而非线性降低。带中的Ag含量很少，带中的塞贝克系数较大。电导率随Ag含量的增加而非线性增加。光盘中的电导率很大。功率因数达到最大值，然后随着Ag含量的增加而降低。在共掺杂的β-FeSi_2中与Ag混合可有效提高光盘的功率因数。

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