研究目的
Investigating the temperature dependencies of the thermal conductivity of AgSbTe2 and Ag0.82Sb1.18Te2.18 and understanding the factors contributing to their low thermal conductivity.
研究成果
The low thermal conductivity of AgSbTe2 and Ag0.82Sb1.18Te2.18 is attributed to crystal lattice disordering and phonon scattering by point defects and structural components. The presence of a second phase, Ag2Te, increases the thermal conductivity of AgSbTe2.
研究不足
The study is limited to the temperature range of 5–320 K and does not explore the effects of other potential scattering mechanisms beyond phonon scattering by point defects and structural components.
1：Experimental Design and Method Selection:
The study involved measuring the thermal conductivity of AgSbTe2 and Ag
2：82Sb18Te18 samples in the temperature range of 5–320 K using the stationary heat flux method. Sample Selection and Data Sources:
Samples were prepared by fusing initial components in sealed quartz ampoules, followed by slow cooling. X-ray diffraction analysis was performed to confirm the crystal structure.
3：List of Experimental Equipment and Materials:
A Bruker D8-XRD ADVANCE diffractometer was used for X-ray analysis. Thermal conductivity was measured in a cryostat designed for thermomagnetic and thermoelectric phenomena studies.
4：Experimental Procedures and Operational Workflow:
The thermal conductivity was measured using the stationary heat flux method. The samples were shaped into parallelepipeds for measurement.
5：Data Analysis Methods:
The thermal conductivity data were analyzed in the context of phonon scattering mechanisms and compared with theoretical models of generalized conductivity of heterogeneous systems.
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