Thermoelectric properties of pulsed electric current sintered samples of AgPb m SbSe 17 (m = 16 or 17)

Chun I. Wu, Ilyia Todorov, Mercouri G. Kanatzidis, Edward Timm, Eldon D. Case, Harold Schock, Timothy P. Hogan

Research output: Contribution to journalArticle

Abstract

Lead chalcogenide materials have drawn attention in recent years because of their outstanding thermoelectric properties. Bulk n-type materials of AgPb m SbTe 2+m have been reported to exhibit high figure of merit, ZT, as high as 1.7 at 700 K. Recent reports have shown p-type lead selenide-based compounds with comparable ZT. The analogous material AgPb m SbSe 17 shares a similar cubic rock-salt structure with PbTe-based compounds; however, it exhibits a higher melting point, and selenium is more abundant than tellurium. Using solid solution chemistry, we have fabricated cast AgPb 15SbSe 17 samples that show a peak power factor of approximately 17 μW/cm K 2 at 450 K. Increasing the strength of such materials is commonly achieved through powder processing, which also helps to homogenize the source materials. Pulsed electric current sintering (PECS) is a hot-pressing technique that utilizes electric current through the die and sample for direct Joule heating during pressing. The mechanisms present during PECS processing have captured significant research interest and have led to some notable improvements in sample properties compared with other densification techniques. We report the thermoelectric properties of PECS samples of AgPb m SbSe 17 along with sample fabrication and processing details.

Original languageEnglish
Pages (from-to)1579-1582
Number of pages4
JournalJournal of Electronic Materials
Volume41
Issue number6
DOIs
Publication statusPublished - Jun 1 2012

Keywords

  • Thermoelectric materials
  • lead chalcogenide
  • pulsed electric current sintering

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering
  • Materials Chemistry

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