Reinvestigation of the Influence of Se Impurity on the Structural and Thermoelectric Properties of AgSbTe_2

摘要

The samples with the nominal composition of AgSbTe_(2-x)Se_x (x = 0.0.. 0.1) were prepared. The structural properties were investigated by X-ray diffraction and SEM microscopy. The electrical conductivity, thermal conductivity and Seebeck coefficient have been measured within the temperature range from 300 to 675K. Heat capacity and phase transitions were studied by DSC method. We have confirmed that prolonged annealing leads to decomposition of materials and degradation of their thermoelectric properties.