含Sm和Cr的P型FeSi_2基热电材料的电学特性  

TRANSPORT PROPERTIES OF P-TYPE FeSi_2 BASED ALLOY DOPED WITH SAMARIUM AND CHROMIUM

作　　者：李伟文[1] 赵新兵[1] 邬震泰[1] 周邦昌[1] 

机构地区：[1]浙江大学硅材料国家重点实验室,杭州310027

出　　处：《有色金属》2002年第2期5-7,共3页Nonferrous Metals

基　　金：国家自然科学基金资助项目 (5 99710 44 )

摘　　要：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FeSi2The FeSi 2 based thermoelectric materials doped with Cr and Sm is prepared by levitation melting and the electrical properties are investigated. The experimental results show that the transport properties of  Fe 1 x y Sm x Cr y Si 2 are affected by the total contents of Sm and Cr, and the electrical resistivity reduces with doped Sm, and Seebeck coefficient is improved by doped Cr. The optimal content of Cr and Sm for high power factor is 3.33% or so and less than 3.33% respectively. The FeSi 2 based thermoelectric materials with excellent properties can be made by doping properly with Cr and Sm.

关 键 词：P型FeSi2基 热电材料 电化学特征 钐 铬 半导体 

分 类 号：TN304.3[电子电信—物理电子学]