4.7 Article

Enhancement of Power Factor and Mechanical Properties in Low Cost Mg2Si1-xSnx Employing a Composite Approach

期刊

ACS APPLIED ENERGY MATERIALS
卷 5, 期 1, 页码 549-556

出版社

AMER CHEMICAL SOC
DOI: 10.1021/acsaem.1c03062

关键词

thermoelectric materials; Mg2Si1-xSnx; power factor; mechanical properties; composites

资金

  1. UGC, New Delhi
  2. AcSIR, Ghaziabad, India

向作者/读者索取更多资源

This study presents a simple production method for Mg2Si1-xSnx material using an in situ plasma-assisted reaction sintering process, achieving enhanced thermoelectric properties, remarkable hardness value, and high fracture strength. The synthesized composite material improves both the mechanical robustness and superior thermoelectric performance of Mg2Si1-xSnx based materials, which is essential for their commercial viability.
High cost, toxicity, and thermal instability issues curtail the usage of thermoelectric power generators (TEGs) for waste heat recovery applications. Mg2Si1-xSnx based thermoelectric material is a proven low cost, nontoxic, and earth crust abundant material for mid-temperature device applications. Still, its thermal stability and mechanical properties remain challenging and unascertained. This work reports a facile and simple production of Mg2Si1-xSnx material employing a composite approach using an in situ plasma-assisted reaction sintering process. The enhanced thermoelectric properties associated with a remarkable hardness value of similar or equal to 5.2 GPa and high fracture strength of similar or equal to 2.17 MPavm were realized in plasma-assisted reactive sintered Mg2Si1-xSnx material, using suitable doping and reinforcement additions. The synthesized composite material improves the mechanical robustness and superior thermoelectric performance, which is a prerequisite for ensuring the commercial viability of Mg2Si1-xSnx based materials.

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