| CoSb3纳米热电材料的制备及热传输特性 |
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| 引用本文： | 余柏林,唐新峰,祁 琼,张清杰.CoSb3纳米热电材料的制备及热传输特性[J].物理学报,2004,53(9):3130-3135. |
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| 作者姓名： | 余柏林 唐新峰 祁 琼 张清杰 |
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| 作者单位： | 武汉理工大学材料复合新材料国家重点实验室，武汉 430070 |
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| 基金项目： | 国家自然科学基金重大国际合作项目(批准号:50310353)，教育部跨世纪优 秀人才基金资助的课题. |
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| 摘 要： | 以Sb，Co为起始原料，采用固相反应法合成了CoSb3.通过高能球磨制得CoSb3纳米粉末，用放电等离子烧结(SPS)方法制备出最小平均晶粒尺寸为150nm的块体材料.研究了晶粒尺寸与热传输性能之间的关系：CoSb3化合物结构纳米化对其晶格热导率κL有显著影响，当晶粒尺寸由微米尺度减小到纳米尺度，晶格热导率κL显著降低，但对载流子热导率κc的影响不甚显著.CoSb3化合物的热导率κ随晶粒尺寸的减小而降 低主要是由于晶格热导率κL随晶粒尺寸的减小而降低所致.
关键词：
纳米
Skutterudite
制备
热传输特性
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| 关 键 词： | 纳米 Skutterudite 制备 热传输特性 |
| 文章编号： | 1000-3290/2004/53(09)/3130-06 |
| 收稿时间： | 2003-12-19 |
| 修稿时间： | 6/2/2004 12:00:00 AM |
Preparation and thermal transport properties of CoSb3 nano-compounds |
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| Yu Bai-Lin,Tang Xin-Feng,Qi Qiong and Zhang Qing-Jie.Preparation and thermal transport properties of CoSb3 nano-compounds[J].Acta Physica Sinica,2004,53(9):3130-3135. |
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| Authors: | Yu Bai-Lin Tang Xin-Feng Qi Qiong and Zhang Qing-Jie |
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| Abstract: | CoSb3 micrometer powder was synthesized by solid state reaction using high pu rity powder of Co,Sb as the starting materials.CoSb3 nano-powder was prepared by high energy ball milling.CoSb3 block material with the average grain size of 150nm was prepared by Spard Plasma Sintering(SPS).The influence of nanostru cture on thermal transport properties of CoSb3 was investigated systematicall y .When the grain size of CoSb3 decreases from micrometer to namometer,the lattice thermal conductivityκL of compounds falls remarkably,while the carries thermal conductivity κc decreased less drastically than did the lattice thermal conductivity κL.The decrease in thermal conductivity of CoSb3 compounds with decreasing grain size was mainly due to the reduction in lattice thermal conductivity. |
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| Keywords: | nanometer Skutterudite preparation t hermal transport properties |
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