(浙江大学 硅材料国家重点实验室，杭州 310027)
摘 要: 用悬浮熔炼法制备了含Sm和Co的N型FeSi2基热电材料，研究了Co对含Sm的FeSi2材料电学性能的影响。结果表明，材料的电学性能是由两种掺杂元素共同决定的：Sm能明显降低样品的电阻率，而适量的Co能提高重掺Sm的FeSi2基热电材料的α值和功率因子，Co在含Sm的FeSi2中的最佳掺杂摩尔分数为2.23%左右。
关键字: Sm；FeSi2；热电材料；功率因子
of Sm-doped FeSi2 based
thermoelectrical material
（State Key Lab of Silicon Materials，Zhejiang University，
Hangzhou 310027，China）
Abstract:The n-type Fe1-x-ySmxCoySi2 thermoelectric materials were prepared by levitation melting. The experimental results show that the electrical properties of Fe1-x-ySmxCoySi2 are determined by the total content of Sm and Co. It is concluded that Co can improve the transport properties of Sm-doped FeSi2 based thermoelectrical materials by increasing the Seebeck coefficient and that Sm has more effect on the electrical resistivity decreasing. The results indicate that the best Co-doped content in this thermoelectrical materials is 2.23% to have high power factor.
Key words: Sm；FeSi2；thermoelectrical materials；power factor
