Thermoelectric Properties of CeFe3CoSb12-MoO2 Composite
Thermoelectric Properties of CeFe3CoSb12-MoO2 Composite
复制标题
DOI：
10.2320/matertrans.e-mra2008819
复制
发表时间：
2008-08
影响因子：
1.2
通讯作者：
S. Katsuyama;H. Okada;Katsuhito Miyajima
中科院分区：
文献类型：
--
作者：
S. Katsuyama;H. Okada;Katsuhito Miyajima
采用机械球磨和放电等离子烧结技术制备了CeFe3CoSb12-MoO2复合材料。MoO2的加入使CeFe3COSB12的Seebeck系数有所降低。无论经过机械球磨，CeFe3CoSb12-MoO2复合材料的电阻率均小于CeFe3CoSb12。CeFe3CoSb12-MoO2复合材料的导热系数一般比CeFe3CoSb12的小。在CeFe3CoSb12中加入MoO2可以有效地降低材料的电阻率和热导率。当CeFe3CoSb12与MoO2的摩尔比为0.95：0.05，球磨时间为5h时，复合材料在773K时的最大无量纲优值系数ZT为1.22，大于CeFe3CoSb12的ZT。
We have prepared the CeFe 3 CoSb 12 -MoO 2 composite by mechanical milling and spark plasma sintering techniques. The Seebeck coefficient of CeFe 3 CoSb 12 is somewhat reduced by the addition of MoO 2 . The electrical resistivity of the CeFe 3 CoSb 12 -MoO 2 composite is smaller than that of CeFe 3 CoSb 12 regardless of being mechanically milled. The thermal conductivity of the CeFe 3 CoSb 12 -MoO 2 composite is generally smaller than that of CeFe 3 CoSb 12 . The addition of MoO 2 to CeFe 3 CoSb 12 is effective for the reduction of both the electrical resistivity and thermal conductivity. The composite whose molar ratio of CeFe 3 CoSb 12 to MoO 2 is 0.95 : 0.05 and milling time is 5 h shows a maximum dimensionless figure of merit ZT of 1.22 at 773 K, which is larger than ZT of CeFe 3 CoSb 12 .