Enhanced thermoelectric properties of P-type BiSbTe/TiO 2 –]Ag alloys

Fong Ren Sie, Chii-Shyang Hwang, Chia Hung Kuo, Ya Wen Chou, Chien Hsuan Yeh

Research output: Contribution to journalArticle

Abstract

Bi 0.4 Sb 1.6 Te 3 /TiO 2 –]Ag nanocomposites were fabricated using a chemical plating method and then compacted via spark plasma sintering at 673 K and 50 MPa for 5 min. The effects of TiO 2 –]Ag nanoparticles (NPs) dispersed into Bi 0.4 Sb 1.6 Te 3 on the thermoelectric and mechanical properties were investigated. The results demonstrated that the carrier concentration and electrical conductivity increased by the incorporation of TiO 2 –]Ag NPs. Moreover, the addition of TiO 2 –]Ag NPs also changed the Fermi level positions and the maximum ZT could be obtained in the temperature range of 300–500 K. The maximum ZT value for a Bi 0.4 Sb 1.6 Te 3 /TiO 2 –]Ag (0.25 wt%) sample was 1.19 at 375 K due primarily to a significant increase in the power factor and an appropriate thermal conductivity. Consequently, the thermoelectric and mechanical properties were improved by embedding the TiO 2 –]Ag NPs into the Bi 0.4 Sb 1.6 Te 3 matrix.

Original languageEnglish
Pages (from-to)30-36
Number of pages7
JournalIntermetallics
Volume109
DOIs
Publication statusPublished - 2019 Jun 1

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Nanoparticles
Mechanical properties
Spark plasma sintering
Fermi level
Plating
Carrier concentration
Thermal conductivity
Nanocomposites
Temperature
Electric Conductivity

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

Cite this

Sie, Fong Ren ; Hwang, Chii-Shyang ; Kuo, Chia Hung ; Chou, Ya Wen ; Yeh, Chien Hsuan. / Enhanced thermoelectric properties of P-type BiSbTe/TiO 2 –]Ag alloys In: Intermetallics. 2019 ; Vol. 109. pp. 30-36.
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abstract = "Bi 0.4 Sb 1.6 Te 3 /TiO 2 –]Ag nanocomposites were fabricated using a chemical plating method and then compacted via spark plasma sintering at 673 K and 50 MPa for 5 min. The effects of TiO 2 –]Ag nanoparticles (NPs) dispersed into Bi 0.4 Sb 1.6 Te 3 on the thermoelectric and mechanical properties were investigated. The results demonstrated that the carrier concentration and electrical conductivity increased by the incorporation of TiO 2 –]Ag NPs. Moreover, the addition of TiO 2 –]Ag NPs also changed the Fermi level positions and the maximum ZT could be obtained in the temperature range of 300–500 K. The maximum ZT value for a Bi 0.4 Sb 1.6 Te 3 /TiO 2 –]Ag (0.25 wt{\%}) sample was 1.19 at 375 K due primarily to a significant increase in the power factor and an appropriate thermal conductivity. Consequently, the thermoelectric and mechanical properties were improved by embedding the TiO 2 –]Ag NPs into the Bi 0.4 Sb 1.6 Te 3 matrix.",
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Enhanced thermoelectric properties of P-type BiSbTe/TiO 2 –]Ag alloys . / Sie, Fong Ren; Hwang, Chii-Shyang; Kuo, Chia Hung; Chou, Ya Wen; Yeh, Chien Hsuan.

In: Intermetallics, Vol. 109, 01.06.2019, p. 30-36.

Research output: Contribution to journalArticle

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