Synthesis and Characterization of Bi2Te3 Thermoelectric Material Using the Cold Pressing and Sintering Method

Tony Kristiantoro, Dedi, Vivi Fauzia

Research output: Contribution to journalConference articlepeer-review

Abstract

Research on thermoelectric material that could convert heat into electricity is expanding rapidly in the effort to improve efficiency. Bismuth telluride (Bi2Te3 or BT) is one of the most promising thermoelectric materials in converting waste heat into electrical energy; however, oxidation that occurs in the sintering process often decreases efficiency. In this study, we propose the use of activated carbon in the sintering of Bi2Te3, which is prepared using cold pressing to reduce the oxidation effect. Our results show Bi2Te3 possessing a polycrystalline single-phase rhombohedral form with lattice parameters of a = 4.3841 Å and c = 30.4816 Å. Covering the BT samples with activated carbon during the sintering process improved the power factor of Bi2Te3 from 0.775 × 10-3W.m-1K-2 to 1.0125 × 10-3W.m-1K-2. The improved thermoelectric properties exhibited in the carbon-covered BT samples may be attributed to the absence of an oxidation process occurring during sintering, as indicated by the energy dispersive spectrometry (EDS).

Original languageEnglish
Article number012033
JournalIOP Conference Series: Materials Science and Engineering
Volume553
Issue number1
DOIs
Publication statusPublished - 12 Nov 2019
Event19th International Union of Materials Research Societies - International Conference in Asia, IUMRS-ICA 2018 - Bali, Indonesia
Duration: 30 Oct 20182 Nov 2018

Keywords

  • Bi2te3
  • Power factor
  • Seebeck coefficient
  • Thermoelectric

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