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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 1 5 0nm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
CoSb3 was synthesized by solid-state reaction using Sb and Co as raw materials.The CoSb3 nanopowder was prepared by high-energy ball milling and the bulk material with the smallest average grain size of 150 nm was prepared by spark plasma sintering (SPS) The relationship between the grain size and the heat transfer properties has been studied: the structure of the CoSb3 nanocrystallization has a significant effect on the thermal conductivity κL of the crystal lattice. When the grain size decreases from the microscale to the nanoscale, the lattice thermal conductivity κL, but the effect on the carrier thermal conductivity κc is not significant.The thermal conductivity κ of the CoSb3 compound decreases with the decrease of the grain size, which is mainly due to the decrease of lattice thermal conductivity κL with the decrease of the grain size Small and lower due