Thermoelectric properties of p-type Bi-Sb-Te compositionally graded thermoelectric materials with different barriers

Guiying Xu, Changchun Ge, Wenbin Cao, Jiangtao Li, and Zhangjian ZhouLaboratory of special Ceramics and Powder Metallurgy,University of Science and Technology Beijing, Beijing, 100083, China

摘 要：<正>In order to find more suitable materials as barriers and to improve the thermoelectric properties, p-type (Bi_l-xSb_x)₂ Te₃ （x = 0.85, 0.9） two segments compositionally graded thermoelectric materials （CGTM） with different barriers were fabricated by conventional hot pressure method. Metals Fe, Co, Cu and Al were used as barriers between two segments. The effects of different barriers on thermoelectric properties of CGTM were investigated. The results show that metal Fe is more stable and suitable as the barrier.

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