Thermoelectric Properties of CeFe3CoSb12-FeSb2 Composite
Thermoelectric Properties of CeFe3CoSb12-FeSb2 Composite
复制标题
DOI：
10.2497/jjspm.54.15
复制
发表时间：
2007
期刊：
影响因子：
--
通讯作者：
S. Katsuyama;H. Nishimura
中科院分区：
文献类型：
--
作者：
S. Katsuyama;H. Nishimura
我们制备了一种烧结CeFe 3CoSb 12-FeSb 2复合材料，并研究了塞贝克系数，电阻率和热导率，以估计相应的品质因数。CeFe 3CoSb_（12）：FeSb_（2）= 0.9：0.1的复合材料的热导率与CeFe 3CoSb_（12）的热导率相当，但复合材料热导率的晶格贡献比CeFe 3CoSb_（12）的小，这是由于添加材料增强了声子散射所致。随着FeSb_2含量的增加，复合材料的热导率提高。随着FeSb 2含量的增加，复合材料的塞贝克系数和电阻率普遍下降。随着FeS 2含量的增加，热导率、Seebeck系数和电阻率的这些行为被认为归因于FeSb 2的物理性质。结果表明，CeFe 3CoSb_（12）：FeSb_（2）= 0.9：0.1时，在373 ~ 773 K的温度范围内，复合材料的品质因数比CeFe 3CoSb_（12）稍大。
We have prepared a sintered CeFe3CoSb12-FeSb2 composite and investigated the Seebeck coefficient, electrical resistivity, and thermal conductivity in order to estimate the corresponding figure of merit. The thermal conductivity of the composite whose molar ratio of CeFe3CoSb12 to FeSb2 is 0.9:0.1 is as large as that of CeFe3CoSb12 while the lattice contribution of the thermal conductivity of the composite is somewhat smaller than that of CeFe3CoSb12, which is ascribed to the enhancement of the phonon scattering caused by the additive material. With increasing FeSb2 content the thermal conductivity of the composite is enhanced. The Seebeck coefficient and electrical resistivity of the composite generally decrease with increasing FeSb2 content. These behaviors in the thermal conductivity, Seebeck coefficient and electrical resistivity with increasing FeS2 content is considered to be ascribed to the physical properties of FeSb2. As a result, the composite whose molar ratio of CeFe3CoSb12 to FeSb2 is 0.9:0.1 shows somewhat larger figure of merit than CeFe3CoSb12 in the whole temperature range from 373K to 773K.