Yb(x)Eu(1-x)Cd2Sb2 的热电性能。
Thermoelectric properties of Yb(x)Eu(1-x)Cd2Sb2.
机构信息
Key Laboratory of Transparent Opto-Functional Inorganic Materials, Shanghai Institute of Ceramics, Chinese Academy of Sciences, 200050 Shanghai, China.
出版信息
J Chem Phys. 2010 Nov 21;133(19):194701. doi: 10.1063/1.3501370.
The thermoelectric performance of EuCd(2)Sb(2) and YbCd(2)Sb(2) was improved by mixed cation occupation. The composition, structure, and thermoelectric properties of Yb(x)Eu(1-x)Cd(2)Sb(2) (x=0, 0.5, 0.75, and 1) have been investigated. Polycrystalline samples are prepared by direct reaction of the elements. Thermoelectric properties were investigated after densification of the materials by spark plasma sintering. Yb(x)Eu(1-x)Cd(2)Sb(2) crystallizes in the P3m1 space group. The lattice parameters increase with the europium content. These materials show low electrical resistivity, high Seebeck coefficient, and low thermal conductivity together with high carrier concentration and high carrier mobility. ZT values of 0.88 and 0.97 are obtained for Yb(0.5)Eu(0.5)Cd(2)Sb(2) and Yb(0.75)Eu(0.25)Cd(2)Sb(2) at 650 K, respectively.
EuCd(2)Sb(2)和 YbCd(2)Sb(2)的热电性能通过混合阳离子占据得到了改善。研究了 Yb(x)Eu(1-x)Cd(2)Sb(2)（x=0、0.5、0.75 和 1）的组成、结构和热电性能。多晶样品通过元素的直接反应制备。通过火花等离子体烧结对材料进行致密化后，研究了热电性能。Yb(x)Eu(1-x)Cd(2)Sb(2)结晶于 P3m1 空间群。晶格参数随铕含量的增加而增加。这些材料表现出低电阻率、高热导率和高载流子浓度以及高载流子迁移率。在 650 K 下，Yb(0.5)Eu(0.5)Cd(2)Sb(2)和 Yb(0.75)Eu(0.25)Cd(2)Sb(2)的 ZT 值分别为 0.88 和 0.97。
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