P-Type and N-Type Bi2Te3/PbTe Functional Gradient Materials for Thermoelectric Power Generation

Kwang Yong Lee; Tae Sung Oh

doi:10.4028/www.scientific.net/MSF.534-536.1493

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HomeMaterials Science ForumMaterials Science Forum Vols. 534-536P-Type and N-Type Bi2Te3/PbTe Functional Gradient...

P-Type and N-Type Bi₂Te₃/PbTe Functional Gradient Materials for Thermoelectric Power Generation

Abstract:

The p-type (Bi0.2Sb0.8)2Te3/(Pb0.7Sn0.3)Te functional gradient material (FGM) was fabricated by hot-pressing the mechanically alloyed (Bi0.2Sb0.8)2Te3 and the 0.5 at% Na2Te-doped (Pb0.7Sn0.3)Te powders. Also, the n-type Bi2(Te0.9Se0.1)3/PbTe FGM was processed by hot-pressing the mechanically alloyed Bi2(Te0.9Se0.1)3 and the 0.3 wt% Bi-doped PbTe powders. With △T larger than 300°C, the p-type (Bi0.2Sb0.8)2Te3/(Pb0.7Sn0.3)Te FGM exhibited larger thermoelectric output power than those of the (Bi0.2Sb0.8)2Te3 and the 0.5 at% Na2Te-doped (Pb0.7Sn0.3)Te alloys. For the n-type Bi2(Te0.9Se0.1)3/PbTe FGM, the thermoelectric output power superior to those of the Bi2(Te0.9Se0.1)3 and the 0.3 wt% Bi-doped PbTe was predicted at △T larger than 300°C.

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Materials Science Forum (Volumes 534-536)

Pages:

1493-1496

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.534-536.1493

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Online since:

January 2007

Authors:

Kwang Yong Lee, Tae Sung Oh

Keywords:

Bismuth Telluride, Figure of Merit (FOM), Functionally Graded Material (FGM), Lead Telluride, Thermoelectric Material

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