Fe-Si-Ge基合金的电学特性

The transport properties of Fe-Si-Ge alloys

含Ge的P型FeSi2基热电材料的电阻率有较大的下降,但仍保持较高的热电动势率,其功率因子有很大的提高。但对于N型FeSi2基热电材料,Ge的引入使样品向P型转变,并引起电学性能变差。可见,Ge的引入可提高P型FeSi2基热电材料的电学性能,Fe0.91Cr0.09Si1.6Ge0.4的功率因子达到β FeSi2的10倍左右。

Ptype FeSi2 alloys doped with germanium have low electrical resitivities while keeping relative high Seebeck confficient, so they have large power factor. But for the ntype FeSi2 alloys, it was observed that they convert into ptype when doping germanium. As a result, doping of germanium in ptype FeSi2 alloys can improve the transport properties. The power factor of Fe0.91Cr0.09Si1.6Ge0.4 was 10 times as high as βFeSi2