Thermoelectric properties of p-type (Bi2Te3)x(Sb2Te3)1-x prepared via bulk mechanical alloying and hot pressing

J. Yang, T. Aizawa, A. Yamamoto, T. Ohta

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Abstract

In the present paper, starting from elemental Bi, Sb and Te granules with 5 N purity and 1-5 mm diameter, p-type single phase (Bi2Te3)x(Sb2Te3)1-x (x=0.20, 0.225, 0.25, 0.275 and 0.30) thermoelectric materials with high densification (>99% theoretical density) were prepared via bulk mechanical alloying (BMA) and hot pressing (HP). Their thermoelectric properties, are less composition sensitive in the composition range of x≤0.25 and are comparable to that of those materials prepared by travelling heater method (THM); the figures of merit of (Bi2Te3)x(Sb2Te3)1-x are about 3×10-3/K. When x>0.25, the figures of merit of (Bi2Te3)x(Sb2Te3)1-x decreased rapidly with increasing x.

Original languageEnglish
Pages (from-to)225-228
Number of pages4
JournalJournal of Alloys and Compounds
Volume309
Issue number1-2
DOIs
Publication statusPublished - 2000 Sep 14

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ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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