Ba和Sm双原子填充Skutterudite化合物的制备及热电性能  

Synthesis and Thermoelectric Properties of the Ba and Sm Double Filled Skutterudites

作　　者：刘桃香[1] 唐新峰[1] 宋晨[1] 张清杰[1] 

机构地区：[1]武汉理工大学材料复合新技术国家重点实验室,湖北武汉430070

出　　处：《稀有金属材料与工程》2007年第12期2174-2178,共5页Rare Metal Materials and Engineering

基　　金：国家重点基础研究发展规划项目"973"项目(2007CB607501);国家自然科学基金(50572082)

摘　　要：以Ba和Sm作为填充原子,用熔融法结合放电等离子快速烧结(SPS)制备出了单相的Ba和Sm复合填充的Skutterudite化合物BamSmnFexCo4-xSb12,研究了两种原子复合填充总量及填充比例对其热电性能的影响规律。结果表明:随着Ba和Sm双原子复合填充总量的增加,p型BamSmnFexCo4-xSb12化合物的Seebeck系数增加、电导率和热导率降低。当复合填充总量相近时,Ba原子填充比例较大的Skutterudite化合物,其电性能稍好;而Sm原子填充比例较大的Skutterudite化合物,其热导率稍低。本研究中Ba0.218Sm0.204Fe1.51Co2.50Sb12化合物的最大热电性能指数ZTmax值在800K时为0.75。Double filled skutterudites BamSmnFexCo4-xSb12 were prepared by melting and Spark Plasma Sintering （SPS） method, and the effects of filling total amount and proportion of Ba and Sm on the thermoelectric properties of these compounds were investigated. For BamSmnFexCo4-xSb12, with increasing of the Ba and Sm double filling total amount, the Seebeck coefficient increases, the electrical conductivity and the thermal conductivity decrease. When the double filling total amount is nearly similar, the electrical conductivity of the skutterudite with larger proportion of Ba filling is better, while the thermal conductivity of the skutterudite with larger proportion of Sm filling is lower. ZTmax value of Ba0.218Sm0.204Fe1.51Co2.50Sb12 compound at 800 K is 0.75.

关 键 词：双原子填充 方钴矿 热电性能 

分 类 号：TN304[电子电信—物理电子学]