Synthesis and Measurement of the Thermoelectric Properties of Multiphase Composites: ZnSb Matrix with Zn4Sb3, Zn3P2, and Cu5Zn8
| Autor: | O. B. Karlsen, Jonas Sottmann, Johan Taftø, Kjetil Valset |
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| Rok vydání: | 2013 |
| Předmět: |
Materials science
chemistry.chemical_element Zinc Condensed Matter Physics Microstructure Copper Electronic Optical and Magnetic Materials chemistry Antimony Electrical resistivity and conductivity Seebeck coefficient Thermoelectric effect Materials Chemistry Electrical and Electronic Engineering Composite material Powder diffraction |
| Zdroj: | Journal of Electronic Materials. 42:1820-1826 |
| ISSN: | 1543-186X 0361-5235 |
| DOI: | 10.1007/s11664-012-2441-7 |
| Popis: | We synthesized a series of samples with composition around 52 at.% zinc (Zn), 44 at.% antimony (Sb), 4 at.% phosphorus (P), and up to 3 at.% copper (Cu) by melting the elements and subsequent annealing. This resulted in dense and almost crack-free samples. X-ray powder diffraction (XRD) and scanning electron microscopy (SEM) revealed composites with a majority phase of ZnSb containing varying amounts of Zn3P2 and Cu5Zn8, in addition to Zn4Sb3 in some of the samples. We measured the Seebeck coefficient, electrical conductivity, and thermal conductivity as a function of temperature. The thermoelectric performance tended to improve with increasing Cu content. At Cu content of 2 at.%, a reduced resistivity allows for the highest dimensionless figure of merit, with a maximum zT value of 0.18 at around 573 K. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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