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Skutterudite化合物具有较高的热导率和Seebeck系数,但具有较高的热导率从而导致热电性能偏低。通过超声化学法合成CoSb3化合物纳米粉体具有很高的应用前景。以CoCl2、SbCl3为原料,采用乙醇为溶剂、NaBH4为还原剂,在超声条件下通过液相反应制备颗粒尺寸为10 nm的非晶态Co、Sb粉体。在H2气氛下380℃反应5 min得到粒径30—50 nm的CoSb3化合物纳米粉体。
Skutterudite compounds have high thermal conductivity and Seebeck coefficient, but have higher thermal conductivity, resulting in lower thermoelectric performance. The synthesis of CoSb3 nanosized powders by ultrasonic chemistry has a very high application prospect. Using CoCl2, SbCl3 as raw materials, ethanol as solvent and NaBH4 as reductant, amorphous Co and Sb powders with particle size of 10 nm were prepared by liquid phase reaction under ultrasonic condition. The reaction was carried out at 380 ℃ for 5 min in H2 atmosphere to obtain CoSb3 compound nanopowders with particle size of 30-50 nm.