Thermoelectric properties of nanostructured (Pb1·mSn mTe)1-x (PbS)x with Pb and Sb precipitates.

Steven N. Girard, Joseph R. Sootsman, Chia Her Lin, John Androulakis, Mercouri Kanatzidis

Research output: Contribution to journalArticlepeer-review

Abstract

We report the physical characterization and thermoelectric properties of (Pb0.95Sn0.05Te)0.92(PbS)0.08 containing excess Pb and Sb prepared using the matrix encapsulation technique. Samples of (Pb0.95Sn0.05Te)0.92(PbS) 0.08: Pb 0.5 - 4 at. % rapidly quenched from the melt show microscale Pb inclusions that increase the thermal conductivity while slightly increasing the power factor, compared to (Pb0.95Sn0.05Te) 0.92(PbS)0.08. Samples of (Pb0.95Sn 0.05Te)0.92(PbS)0.08:Pb 0.5%, Sb 2% prepared using the same technique show microscale Sb and Pb inclusions that upon heating cause rapid PbS and Sb segregation from the Pb Te matrix. This behavior significantly alters the microstructure and degrades the transport properties of the material.

Original languageEnglish (US)
Pages (from-to)101-106
Number of pages6
JournalMaterials Research Society Symposium Proceedings
Volume1044
StatePublished - Oct 9 2008

ASJC Scopus subject areas

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

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