含Sm、Mn的P型FeSi_2基热电材料的电学性能  

Electrical properties of P-type FeSi_2 based thermoelectric materials doped with Sm and Mn

作　　者：李伟文[1] 赵新兵[1] 邬震泰[1] 周邦昌[1] 

机构地区：[1]浙江大学材料系硅材料国家重点实验室,杭州310027

出　　处：《中国有色金属学报》2003年第2期419-422,共4页The Chinese Journal of Nonferrous Metals

基　　金：国家自然科学基金资助项目(59971044)

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。 The Ptype Fe1-x-ySmxMnySi2 thermoelectric materials were prepared by levitation melting. The experimental results show that, the electrical properities of the Ptype Fe1-x-ySmxMnySi2 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 Fe1-x-ySmxMnySi2. 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%. 

关 键 词：P型FeSi2基热电材料 电学性能 掺杂 钐 锰 悬浮熔炼 电阻率 热电动势率 功率因子 

分 类 号：TN37[电子电信—物理电子学]