
Abstract Nanostructured AgPb 18 SbS 20 thermoelectric powders have been successfully synthesized by hydrothermal method. X-ray diffraction (XRD) and transmission electron microscopy (TEM) were respectively used for characterization of the powders. The mean size of the powders synthesized at 180 °C for 48 h is about 300 nm. Based on the TEM observations of AgPb 18 SbS 20 , nano-sized regions generated by the co-doped Ag + and Sb 3+ ions were observed in the PbS matrix. Possible formation mechanisms of AgPb 18 SbS 20 were also discussed.
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