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Enhancement in Performance of the Tubular Thermoelectric Generator (TTEG)

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Abstract

For use in a tubular thermoelectric generator (TTEG), we fabricated tubular Bi0.5Sb1.5Te3/Ni composite using a melt-spinning technique combined with the spark plasma sintering (SPS) process. With this method, powder sintering, joining of two different materials, and tubular shaping can be achieved simultaneously. The tilted laminate structure which is crucial for the transverse thermoelectric effect was successfully achieved in the sample after SPS densification. The sintered samples showed better mechanical stability and thermoelectric properties compared with the previously studied melt-cast sample. We confirmed larger open-circuit voltage of 240 mV and generating power of 2.5 W with a 100-mm-long TTEG under the small temperature difference of 83 K, and the corresponding power density for a unit heat transfer surface area was approximately 800 W m−2.

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Correspondence to Akihiro Sakai.

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Sakai, A., Kanno, T., Takahashi, K. et al. Enhancement in Performance of the Tubular Thermoelectric Generator (TTEG). J. Electron. Mater. 42, 1612–1616 (2013). https://doi.org/10.1007/s11664-012-2355-4

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  • DOI: https://doi.org/10.1007/s11664-012-2355-4

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