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Hydrothermal synthesis and thermoelectric properties of nanostructured Bi0.5Sb1.5Te3 compounds |
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| Authors: | Yanhua Zhang Guiying Xu Fei Han Changchun Ge |
| Affiliation: | a Institute of Special Ceramics and Powder Metallurgy, University of Science and Technology Beijing, No. 30, Xueyuan Road, Beijing 100083, China b Academy of Equipment Command & Technology, Beijing 102249, China c Department of Chemistry and iNANO, Aarhus University, Langelandsgade 140, DK-8000 Aarhus, Denmark |
| Abstract: | Single-phase Bi0.5Sb1.5Te3 compounds have been prepared by hydrothermal synthesis at 150 °C for 24 h using SbCl3, BiCl3 and tellurium powder as precursors. X-ray diffraction (XRD) and field emission scanning electron microscopy (FESEM) have been applied to analyze the phase distributions, microstructures and grain sizes of the as-grown Bi0.5Sb1.5Te3 products. It is found that the hydrothermally synthesized Bi0.5Sb1.5Te3 nanopowders have a morphology dominated by irregular hexagonal sheets due to the anisotropic growth of the crystals. The Bi0.5Sb1.5Te3 nanosheets are parallelly stacked in certain direction to form sheet-agglomerates attribute to the temperature gradients in the solution. |
| Keywords: | A. Nanostructure C. X-ray diffraction D. Microstructure D. Thermal conductivity |
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