Thermoelectric Performance of Tetrahedrite Synthesized by a Modified Polyol Process
| Autor: | Grace E. Kunkel, Donald T. Morelli, Daniel L. Stevens, Daniel P. Weller, Mary Elizabeth Anderson, Andrew M. Ochs, Cameron F. Holder |
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| Rok vydání: | 2017 |
| Předmět: |
Materials science
General Chemical Engineering Tetrahedrite Pellets Spark plasma sintering Nanotechnology 02 engineering and technology General Chemistry engineering.material 010402 general chemistry 021001 nanoscience & nanotechnology Thermoelectric materials 01 natural sciences 0104 chemical sciences Thermal conductivity Chemical engineering Electrical resistivity and conductivity Seebeck coefficient Thermoelectric effect Materials Chemistry engineering 0210 nano-technology |
| Zdroj: | Chemistry of Materials. 29:1656-1664 |
| ISSN: | 1520-5002 0897-4756 |
| Popis: | Tetrahedrite, a promising thermoelectric material composed of earth-abundant elements, has been fabricated utilizing the rapid and low energy modified polyol process. Synthesis has been demonstrated for undoped and zinc-doped tetrahedrite samples on the gram scale requiring only 1 h at 220 °C. This method is capable of incorporating dopants and producing particles in the 50–200 nm size regime. For determination of bulk thermoelectric properties, powders produced by this solution-phase method were densified into pellets by spark plasma sintering. Thermopower, electrical resistivity, and thermal conductivity were obtained for temperatures ranging from 323 to 723 K. Maximum ZT values at 723 K were found to be 0.66 and 1.09 for the undoped and zinc-doped tetrahedrite samples, respectively. These values are comparable to or greater than those obtained using time and energy intensive conventional solid-state methods. Consolidated pellets fabricated using nanomaterial produced by this solution-phase method were ... |
| Databáze: | OpenAIRE |
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