High-temperature thermoelectric properties of AgPb₁₈SbTe₂₀ prepared by high pressure

Abstract

The thermoelectric (TE) properties of AgPb₁₈SbTe₂₀ synthesized by high pressure (3.5–5.5 GPa) were investigated in the temperature range of 20–300 °C. All the samples crystallize in the NaCl-type structure without noticeable secondary phase. The measurement results show that the TE properties, including Seebeck coefficient electrical conductivity, and thermal conductivity of AgPb₁₈SbTe₂₀, could be tuned effectively by adjusting the synthetic pressure. The maximum figure-of-merit reaches 0.76 at 300°C for the sample prepared at 4.5 GPa.

Keywords:

• thermoelectric
• high pressure
• AgPb₁₈SbTe₂₀

Acknowledgements

This work was supported by the National Science Foundation of China under Grant No. 51001042 and the Scientific and Technological Projects under General Administration of Quality Supervision, Inspection and Quarantine of China.

Additional information

Notes on contributors

Hongtao Li

These authors contributed equally to the work.

Taichao Su

These authors contributed equally to the work.