Experimental and theoretical evaluation on thermoelectricity for SPS-joined p-n module in Bi-Te system

Sang Seok Kim, Shigeo Yamamoto, Tatsuhiko Aizawa, Atsushi Yamamoto

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Thermoelectric p-n modules are prepared by the spark plasma sintering (SPS) solid bonding for experimental and theoretical evaluation on their thermoelectricity. Both p-type (Bi 0.4Sb 1.6Te 3) and n-type (Bi 2Te 2.85Se 0.15) materials are prealloyed from elemental granule mixture via the bulk mechanical alloying, shear-extruded to control their anisotropic texture and joined to fabricate p-n modules. The mutual atomic diffusion layer across the p-n interface is controlled down to 2 μm, 0.04 times narrower than that for hot-pressed p-n interface. Open-circuit voltage and resistance of p-n modules are measured for various interface layer height. They are compared with theoretical estimates via the computer-aided analysis. Analytical expressions are proposed to estimate the thermoelectric characteristics on p-n module. The power generation characteristics of p-n modules is also evaluated for various temperature differences between cold and hot sources.

Original languageEnglish
Pages (from-to)1506-1513
Number of pages8
JournalMaterials Transactions
Volume46
Issue number7
DOIs
Publication statusPublished - 2005 Jul 1

Keywords

  • Bismuth telluride
  • Computer-aided analysis
  • P-n junction
  • Power generation
  • Spark plasma sintering
  • Thermoelectricity

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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