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P-type and N-type Bi2Te3/PbTe functional gradient materials for thermoelectric power generation
- Authors
- Lee, Kwang-Yong; Oh, Tae-Sung
- Issue Date
- 2007
- Publisher
- TRANS TECH PUBLICATIONS LTD
- Keywords
- thermoelectric materials; bismuth telluride; lead telluride; functional gradient materials; figure of merit
- Citation
- PROGRESS IN POWDER METALLURGY, PTS 1 AND 2, v.534-536, pp.1493 - +
- Journal Title
- PROGRESS IN POWDER METALLURGY, PTS 1 AND 2
- Volume
- 534-536
- Start Page
- 1493
- End Page
- +
- ISSN
- 0255-5476
- Abstract
- The p-type (Bi0.2Sb0.8)(2)TC3/(Pb0.7Sn0.3)Te functional gradient material (FGM) was fabricated by hot-pressing the mechanically alloyed (Bi0.2Sb0.8)(2)Te-3 and the 0.5 at% Na2Te-dopcd (Pb0.7Sn0.3)Te powders. Also, the n-type Bi-2(Te0.9Se0.1)(3)/PbTe FGM was processed by hot-pressing the mechanically alloyed Bi-2(Te0.9Se0.1)(3) and the 0.3 wt% Bi-doped PbTe powders. With Delta T larger than 300 degrees C, the p-type (Bi0.2Sb0.8)(2)Te-3/(Pb0.7Sn0.3)Te FGM exhibited larger thermoelectric output power than those of the (Bi0.2Sb0.8)(2)Te-3 and the 0.5 at% Na2Te-doped (Pb0.7Sn0.3)Te alloys. For the n-type Bi-2(Te0.9Sc0.1)(3)/PbTe FGM, the thermoelectric output power superior to those of the Bi-2(Te0.9Se0.1)(3) and the 0.3 wt% Bi-doped PbTe was predicted at Delta T larger than 300 degrees C.
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