Zone leveling crystal growth of thermoelectric PbTe alloys with Sb 2Te3 widmanstätten precipitates

Teruyuki Ikeda*, Nathan J. Marolf, G. Jeffrey Snyder

*Corresponding author for this work

Research output: Contribution to journalArticle

10 Scopus citations

Abstract

Unidirectional solidification of PbTe-rich alloys in the pseudobinary PbTe-Sb2Te3 system using the zone leveling technique enables the production of large regions of homogeneous solid solutions for the formation of precipitate nanocomposites as compared with Bridgman solidification. (PbTe)0.940(Sb2Te3) 0.060 and (PbTe)0.952(Sb2Te3) 0.048 alloys were successfully grown using (PbTe) 0.4(Sb2Te3)0.6 and (PbTe) 0.461(Sb2Te3)0.539 as seed alloys, respectively, with 1 mm h-1 withdrawal velocity. In the unidirectionally solidified regions of both alloys, Widmanstätten precipitates are formed due to the decrease in solubility of Sb 2Te3 in PbTe. To determine the compositions of the seed alloys for the zone leveling experiments, the solute distribution in solidification in the PbTe-richer part of the pseudobinary PbTe-Sb 2Te3 system has been examined from the concentration profiles in the samples unidirectionally solidified by the Bridgman method.

Original languageEnglish (US)
Pages (from-to)4183-4189
Number of pages7
JournalCrystal Growth and Design
Volume11
Issue number9
DOIs
StatePublished - Sep 7 2011

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

Fingerprint Dive into the research topics of 'Zone leveling crystal growth of thermoelectric PbTe alloys with Sb <sub>2</sub>Te<sub>3</sub> widmanstätten precipitates'. Together they form a unique fingerprint.

  • Cite this