| 稀土元素Ce填充p型方钴矿化合物的热电性能 |
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| 引用本文： | 王焜,唐新峰,张清杰. 稀土元素Ce填充p型方钴矿化合物的热电性能[J]. 半导体学报, 2006, 27(6): 1021-1025 |
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| 作者姓名： | 王焜 唐新峰 张清杰 |
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| 作者单位： | 武汉理工大学材料复合新技术国家重点实验室,武汉,430070 |
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| 基金项目： | 国家高技术研究发展计划(863计划)，国家自然科学基金 |
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| 摘 要： | 用高温熔融-退火扩散法合成了富Co组成的方钴矿化合物CeyFexCo4-xSb12(y=0～0.42),并对化合物的结构和热电性能进行了研究.结果表明:化合物的晶格常数随Ce填充量的增加而线性增加.霍尔系数RH为正值,CeyFexCo4-xSb12化合物表现p型传导.载流子浓度和电导率随Ce填充量的增加而减少.Seebeck系数随Ce填充量的增加及温度的上升而增加.晶格热导率在Ce填充量约为0.29时达到最小值,说明在Sb组成的二十面体空洞中部分填充时,Ce的扰动对声子的散射作用最强.在725K时,组成为Ce0.29Fe1.41Co2.59Sb12.32化合物的最大无量纲热电性能指数达到0.65.
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| 关 键 词： | p型方钴矿 合成 热电性能 |
| 收稿时间： | 2015-08-20 |
Thermoelectric Properties of p-Type Rare-Earth Element Cerium-Filled Skutterudite CeyFexCo4-xSb12 |
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| Wang Kun, Tang Xinfeng, Zhang Qingjie. Thermoelectric Properties of p-Type Rare-Earth Element Cerium-Filled Skutterudite CeyFexCo4-xSb12[J]. Journal of Semiconductors, 2006, In Press. Wang K, Tang X F, Zhang Q J. Thermoelectric Properties of p-Type Rare-Earth Element Cerium-Filled Skutterudite CeyFexCo4-xSb12[J]. Chin. J. Semicond., 2006, 27(6): 1021.Export: BibTex EndNote |
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| Authors: | Wang Kun Tang Xinfeng Zhang Qingjie |
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| Affiliation: | State Key Laboratory of Advanced Technology for Material Synthesis and Processing,Wuhan University of Technology,Wuhan 430070,China;State Key Laboratory of Advanced Technology for Material Synthesis and Processing,Wuhan University of Technology,Wuhan 430070,China;State Key Laboratory of Advanced Technology for Material Synthesis and Processing,Wuhan University of Technology,Wuhan 430070,China |
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| Abstract: | Cobalt-rich filled skutterudite compounds CeyFexCo4-xSb12(y=0～0.42) are synthesized using the melting-diffusion method.The structure and thermoelectric properties of the compounds are investigated.Results indicate that the lattice constants increase linearly with the Ce filling fraction.Hall coefficient is positive.Hole concentration and electrical conductivity decreased as the Ce filling fraction increases.Seebeck coefficient increase with the Ce filling fraction.The lattice thermal conductivity reached the minimum value when the Ce filling fraction was about 0.29,indicating that the effect of Ce rattling on phonon scattering is the strongest as Sb-dodecahedron partial voids are filled by Ce.A maximum ZT value of 0.65 is obtained for Ce0.29Fe1.41Co2.59Sb12.32 at 725K. |
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| Keywords: | p-type skutterudite synthesis thermoelectric properties |
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