Properties of Ag-doped Bi-Sb alloys as thermoelectric conversion materials for solid state refrigeration

2009年第3卷第1期

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《能源前沿（英文）》 >> 2009年第3卷第1期 doi: 10.1007/s11708-009-0005-1

Properties of Ag-doped Bi-Sb alloys as thermoelectric conversion materials for solid state refrigeration

1. 1. Key Laboratory of Cryogenics, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China; 2. 2. Department of Physics, Zunyi Normal College, Zunyi 563002, China

发布日期： 2009-03-05

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摘要

The energy conversion properties of Bi-Sb system thermoelectric materials doped by Ag was investigated. Bi Sb Ag ( =0, 1, 2, 3, 4) alloys with Ag substitution for Sb were synthesized by mechanical alloying and then pressed under 5 GPa at 523 K for 30 min. The phase structure of the alloys was characterized by X-ray diffraction. The electric conductivities and the seebeck coefficients were measured at the temperature range of 80-300 K. The results reveal that the electric conductivities of the Ag-doped Bi-Sb alloys are highly improved. The power factor of Bi Sb Ag reaches a maximum value of 2.98×10 W/(K ?m) at 255 K, which is about three times that of the un-doped sample Bi Sb at the same temperature.

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thermoelectric conversion materials ; high-pressure sintering ; thermoelectric properties