Synthesis and Thermoelectric Properties of the YbTe-YbSb System

Airi Kawamura, Yufei Hu, Susan M. Kauzlarich

Research output: Contribution to journalArticle

Abstract

The syntheses of YbTe1−xSbx (x = 0, 0.05, 0.2, 0.5, 0.8, 1) were investigated by solid state reactions and formed into dense pellets by spark plasma sintering. X-ray powder diffraction and microprobe analysis indicated no solubility of Sb in YbTe, and these phases are better described as composite phases (YbTe)1−x(YbSb)x (x = 0, 0.05, 0.2, 0.5, 0.8, 1). Thermal conductivity, electrical resistivity, and Seebeck coefficients were acquired for the larger values of x (x = 0.2, 0.5, 0.8, 1) from room temperature to 773 K, and the figure of merit was calculated. Thermal conductivities for x = 0, 0.05 are also reported; however, measurements of Seebeck coefficients and electrical resistivity were not possible due to large resistivity. The figure of merit for all samples was low, and the maximum zT measured was zT791K = 0.018 for YbSb. Low figures of merit were primarily the result of very high resistivity in YbTe rich samples, and high thermal conductivity, and a small Seebeck coefficient in all samples.

Original languageEnglish (US)
Pages (from-to)1-7
Number of pages7
JournalJournal of Electronic Materials
DOIs
StateAccepted/In press - Nov 25 2015

Keywords

  • powder x-ray diffraction
  • rock-salt structure
  • seebeck
  • Thermoelectric composite
  • transport properties
  • YbSb
  • YbTe

ASJC Scopus subject areas

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

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