| Thermoelectric properties of Yb x Co_4 Sb_（12） system |
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| 作者姓名： | 刘洪权 赵新兵 朱铁军 谷亦杰 |
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| 作者单位： | [1]College of Materials Science and Engineering, Shandong University of Science and Technology, Qingdao 266590, China [2]Department of Materials Science, State Key Laboratory of Silicon Materials, Zhejiang University, Hangzhou 31002 7, China |
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| 基金项目： | supported by National Natural Science Foundation of China （50801054）;the Research Award Fund for Outstanding Young Scientist in Shandong Province,China （BS2011CL031） |
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| 摘 要： | Yb x Co 4 Sb 12 polycrystals were fabricated by vacuum melting combined with hot-press sintering.The effect of Yb-filling on thermoelectric property of unfilled skutterudite CoSb 3 was investigated,which indicated the enhancement of the power factor of the material.Transport properties of materials changed from semi-conductor to semi-metal during the measurement of electrical conductivity,which indicated the change of electronic band structure.The maximum value of electrical conductivity was about 190000 S/m at 300 K for all samples.On the basis of Yb-filling,power factor of Yb 0.2 Co 4 Sb 12 reached 5-6 mW/(m·K) during the measurement temperature.Thermal conductivity decreased with increase of Yb content,and the thermal conductivity of Yb 0.2 Co 4 Sb 12 reached 3.2 W/(m·K) at 600 K.The ZT value of Yb 0.2 Co 4 Sb 12 reached 1.16 at 700 K due to positive contribution from high power factor and low thermal conductivity.
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| 关 键 词： | thermoelectric properties power factor Yb-filling thermal conductivity rare earths |
| 收稿时间： | 2011-11-07 |
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