(浙江大学 材料系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、 Mn的P型FeSi2基热电材料。 实验结果表明, 其电学性能是由掺杂的两种元素共同决定的, Sm对降低样品电阻率的作用较大, 而Mn有助于提高样品的热电动势率。 要保证有较高功率因子, Mn、 Sm掺杂总摩尔分数应小于5%, 而Mn的最佳掺杂摩尔分数在1.7%左右。
关键字: Sm； FeSi2； 热电材料； 功率因子
based thermoelectric materials
doped with Sm and Mn
（State Key Laboratory of Silicon Materials,
Department of Materials Science and Engineering，
Zhejiang University, Hangzhou 310027, China）
Abstract:The P-type Fe1-x-ySmxMnySi2 thermoelectric materials were prepared by levitation melting. The experimental results show that, the electrical properties of the P-type Fe1-x-ySmxMnySi2 alloys are determined by the sum of samarium and manganese contents; the samarium has good effect on the electrical resistivity decreasing, while the manganese can improve Seebeck coefficient for P-type
Fe1-x-ySmxMnySi2. It is necessary to attain a higher power factor that the manganese content in mole fraction should be 1.7% or so and the sum dopant content is less than 5%.
Key words: Sm; FeSi2; thermoelectric material; power factor
