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A2: Medium temperature materials

Thermoelectric Properties and phase transformation mechanism of the Cu3SbS3Compound Prepared by Combustion Synthesis

 Yonghui You1, Xianli Su1，Xinfeng Tang1,a
State Key Laboratory of Advanced Technology For Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China

Cu3SbS3 is a potential new thermoelectric material which is inexpensive, environment-friendly and comprised of earth-abundant Cu and S. Due to the lone s2 paire electrons, the thermal conductivity is ultra-low intrisically. However, the synthesis processing is very complicated and time-consuming. In this study, combustion synthesis plus plasma activated sintering(PAS) is developed and firstly applied for the synthesis of Cu3SbS3. Single phase Cu3SbS3 is obtained by combustion synthesis plus plasma activated sintering(PAS). It shortens the synthesis period from traditional 7 days to less than 20 minutes. The phase transformation processing is investigated during the combustion synthesis process via XRD, FESEM and DSC et.al. The correlation between microstructure and its thermoelectric properties is studied. Combustion synthsis combined with PAS technique is significant for the low cost mass production of  thermoelectric material, which is beneficial for the large scale application of medium temperature thermoelectric materials.