Thermoelectric and mechanical properties of spark plasma sintered Cu3SbSe3 and Cu3SbSe4: Promising thermoelectric materials | Zendy

Kriti Tyagi | Zendy; Bhasker Gahtori | Zendy; Sivaiah Bathula | Zendy; Vijaykumar Toutam | Zendy; Sakshi Sharma | Zendy; Niraj K. Singh | Zendy; Ajay Dhar | Zendy

Open Access

Thermoelectric and mechanical properties of spark plasma sintered Cu3SbSe3 and Cu3SbSe4: Promising thermoelectric materials

Author(s) -

Kriti Tyagi,

Bhasker Gahtori,

Sivaiah Bathula,

Vijaykumar Toutam,

Sakshi Sharma,

Niraj K. Singh,

Ajay Dhar

Publication year - 2014

Publication title -

applied physics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.182

H-Index - 442

eISSN - 1077-3118

pISSN - 0003-6951

DOI - 10.1063/1.4904996

Subject(s) - spark plasma sintering , thermoelectric effect , materials science , thermoelectric materials , thermal conductivity , electrical resistivity and conductivity , composite material , fracture toughness , indentation hardness , metallurgy , sintering , microstructure , thermodynamics , electrical engineering , engineering , physics

We report the synthesis of thermoelectric compounds, Cu3SbSe3 and Cu3SbSe4, employing the conventional fusion method followed by spark plasma sintering. Their thermoelectric properties indicated that despite its higher thermal conductivity, Cu3SbSe4 exhibited a much larger value of thermoelectric figure-of-merit as compared to Cu3SbSe3, which is primarily due to its higher electrical conductivity. The thermoelectric compatibility factor of Cu3SbSe4 was found to be ∼1.2 as compared to 0.2 V−1 for Cu3SbSe3 at 550 K. The results of the mechanical properties of these two compounds indicated that their microhardness and fracture toughness values were far superior to the other competing state-of-the-art thermoelectric materials.

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