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
Externally publishedYes

Fingerprint

Thermoelectricity
thermoelectricity
Computer aided analysis
Spark plasma sintering
Mechanical alloying
Open circuit voltage
sparks
Power generation
sintering
Textures
modules
evaluation
Temperature
estimates
open circuit voltage
alloying
temperature gradients
textures
shear

Keywords

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

ASJC Scopus subject areas

  • Materials Science(all)
  • Metals and Alloys

Cite this

Experimental and theoretical evaluation on thermoelectricity for SPS-joined p-n module in Bi-Te system. / Kim, Sang Seok; Yamamoto, Shigeo; Aizawa, Tatsuhiko; Yamamoto, Atsushi.

In: Materials Transactions, Vol. 46, No. 7, 07.2005, p. 1506-1513.

Research output: Contribution to journalArticle

Kim, Sang Seok ; Yamamoto, Shigeo ; Aizawa, Tatsuhiko ; Yamamoto, Atsushi. / Experimental and theoretical evaluation on thermoelectricity for SPS-joined p-n module in Bi-Te system. In: Materials Transactions. 2005 ; Vol. 46, No. 7. pp. 1506-1513.
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