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通过高温悬浮熔炼法制备含Cr、Sm的P型FeSi2 基热电材料Fe1 x ySmxCrySi2 ,进行电学性能的测试和研究。实验结果表明Fe1 x ySmxCrySi2 的输运特性是由两种掺杂元素共同作用所决定的 ,Sm对电阻率的变化影响较大 ,而Cr的掺入能提高样品的热电动势率。为提高材料的电学性能 ,Cr的最佳掺杂原子数在 3 .3 3 %左右 ,而Sm的含量应小于 3 .3 3 %。通过Sm、Cr的适当掺杂 ,可得到电学性能优良的FeSi2 基热电材料
The P-type FeSi2-based thermoelectric material Fe1 x ySmxCrySi2 containing Cr and Sm was prepared by high-temperature suspension melting method, and the electrical properties were tested and studied. The experimental results show that the transport properties of Fe1 x ySmxCrySi2 are determined by the interaction of the two doping elements. Sm has a great effect on the change of resistivity, while the incorporation of Cr can increase the sample’s thermal-EMF. In order to improve the electrical properties of the material, the optimal doping number of Cr is about 3.3%, while the content of Sm is less than 3.333%. Through appropriate doping of Sm and Cr, FeSi2-based thermoelectric materials with excellent electrical properties can be obtained