INORGANIC MATERIALS AND CERAMIC MATRIX COMPOSITES |
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Effect of Melt Spinning Process on Microstructure and Thermoelectric Properties of Mg2(Si0.4Sn0.6)Sb0.015 Solid Solution |
LIU Hongliang1,2,*, GUO Zhiying1, YUAN Xiaofeng1, ZHU Zunwei1, GAO Qianqian1, ZHANG Xin2
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1 School of Materials Science and Engineering, Anyang Institute of Technology, Anyang 455000, Henan, China 2 Key Laboratory of Advanced Functional Materials, Ministry of Education, Beijing University of Technology, Beijing 100124, China |
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Abstract Mg2(Si, Sn)-based materials are a kind of environment-friendly thermoelectric materials with great application prospects.The single phase Mg2(Si0.4Sn0.6)Sb0.015 solid solution was prepared by melt spinning (MS) combined with spark plasma sintering (MS+SPS).By comparing with the same sample prepared by mechanical alloying (MA) combined with spark plasma sintering (MA+SPS), the effect of MS process on its microstructure and thermoelectric properties were studied.The results show that the solid solution thin belt obtained by MS is mainly composed of small particles of 200—500 nm.The obtained sinered dense buck material has obviously refined grains and uniformly distributed coherent nano precipitates.Compared with the samples prepared by MA+SPS process, the mobility of solid solution prepared by MS+SPS is significantly reduced, the resistivity increases slightly, the Seebeck coefficient increases significantly, and the thermal conductivity and lattice thermal conductivity decrease significantly.The thermoelectric properties of Mg2(Si0.4Sn0.6)Sb0.015 solid solution prepared by MS+SPS are significantly improved, and the maximum ZT value reached to 1.30 at 643 K.
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Published: 25 June 2024
Online: 2024-07-17
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Fund:Scientific and Technological Project of Henan Province (2221022230020), the Key Technology Project of Anyang City (2021c01gx007), the Key Scientific Research Projects Plan of Colleges and Universities in Henan Province (22B430002) and Doctoral Foundation of Anyang Institute of Technology ( BSJ2021004). |
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