Abstract

CoSb₃ with its high electrical conductivity, Seebeck coefficient and rather low thermal conductivity is quite a promising material for thermoelectric conversion applications. A potentially high figure of merit (ZT) can be achieved by a nanostructure evolution of thermoelectric materials. In this work, CoSb₃ nanoparticles were synthesized through a thermal decomposition method in cooperation with a hot injection technique. Nano-sized CoSb₃ particles were obtained through the thermal decomposition reaction between the pre-heated cobalt-oleate at 320℃ and the injected antimony oleate with room temperature. The results showed that the particle size was increased with increasing synthesis temperature and the crystallinity of particles was improved with temperature but the decomposition of CoSb₃ was observed at 320℃. The CoSb₃ particles synthesized at 300℃ showed a high purity and an homogeneous shape with average particle size of 26 nm.

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