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Advances in Materials Research Volume 13, Number 1, February 2024 , pages 55-62 DOI: https://doi.org/10.12989/amr.2024.13.1.055 |
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The synthesis and properties of point defect structure of Cu2-XZnSnS4 (x=0.1, 0.2, and 0.3) |
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Bui D. Long and Le T. Bang
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| Abstract | ||
| Cu-based sulfides have recently emerged as promising thermoelectric (TE) materials due to their low cost, non-toxicity, and abundance. In this research, point defect structure of Cu2-xZnSnS4 (x=0.1, 0.2, 0.3) samples were synthesized by the mechanical alloying method. Mixed powders of Cu, Zn, Sn and S were milled using high energy ball milling at a rotation speed of 300 rpm in Ar atmosphere. The milled Cu2-xZnSnS4 powders were heat-treated at 723 K for 24 h, and subsequently consolidated using spark plasma sintering (SPS) under an applied pressure of 60 MPa for 15 min. The thermal conductivity of the sintered Cu2-xZnSnS4 samples was evaluated. A well-defined Cu2-xZnSnS4 powders were successfully formed after milling for 16 h, with the particle sizes mostly distributed in the range of 60-100 nm. The lattice constants of a and c decreased with increasing composition value x. The thermal conductivity of sintered x=0.1 sample exhibited the lowest value and attained 0.93 W/m K at 673 K. | ||
| Key Words | ||
| Cu2ZnSnS4; mechanical alloying and thermal conductivity; thermoelectric materials | ||
| Address | ||
| School of Materials Science and Engineering, Hanoi University of Science and Technology, No.1 Dai Co Viet, Hai Ba Trung, Hanoi, Vietnam | ||
