期刊
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
卷 161, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jpcs.2021.110472
关键词
Magnesium silicide; Mechanical alloying; Ball milling; Solid state reaction synthesis; Thermoelectric properties; Mechanical properties
资金
- THERMOSS Project by EU network M-ERA.NET [KOINA/M-ERA.NET/0316/03]
- European Regional Development Fund
- Republic of Cyprus through the Research Promotion Foundation [NEA YPODOMH/NEKYP/0308/17]
In this study, Bi-doped Mg2Si0.55-xSn0.4Gex (x = 0 and 0.05) materials were prepared by mechanical alloying combined with hot press sintering to enhance the mass capabilities of their synthesis route. The optimum thermoelectric properties were achieved for Mg2Si0.57Sn0.4Bi0.03 and Mg2Si0.53Sn0.4Ge0.05Bi0.02 compositions with maximum figure of merit (ZT) values of 1.07 and 1.2, respectively, after ball milling for 32 hours.
Mg2Si-type compounds are highly promising materials for use in thermoelectric devices for waste heat energy harvesting. These compounds have great potential because they exhibit high thermoelectric performance, but the scalability of their synthesis is a major issue for applications. In this study, Bi-doped Mg2Si0.55-xSn0.4Gex (x = 0 and 0.05) materials were prepared by mechanical alloying combined with hot press sintering in order to increase the mass capabilities of their synthetic route compared with the typical solid state reaction. The optimum thermoelectric properties were achieved for the best Mg2Si0.57Sn0.4Bi0.03 and Mg2Si0.53Sn0.4Ge0.05Bi0.02 compositions by ball milling for 32 h and the maximum figure of merit (ZT) values were 1.07 and 1.2, respectively.
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