Density measurement of solid and molten Sb2Te3 chalcogenide alloy by sessile drop method

Rui Lan, Rie Endo, Masashi Kuwahara, Yoshinao Kobayashi, Masahiro Susa

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


Sb2Te3 chalcogenide alloy has been widely investigated due to its applications in phase change random access memory (PCRAM) and thermoelectric materials. The density of Sb2Te3 alloy is a key factor for both applications. In this work, the densities of Sb2Te3 chalcogenide alloy in solid and molten states have been determined as a function of temperature by the sessile drop method. The density at room temperature was also determined by the Archimedean method to verify the reliability of data obtained by the sessile drop method. The density of solid Sb2Te3 alloy decreases linearly with increasing temperature and there is a discontinuous density decrease at the melting temperature due to the phase change. In the molten state, the density continues decreasing with increasing temperature. The molar volume of Sb2Te3 chalcogenide alloy increases by about 4% from room temperature to just below the melting temperature and by 6% at the melting temperature from the solid to molten state, which may cause large stress for PCRAM devices.

Original languageEnglish
Pages (from-to)219-229
Number of pages11
JournalHigh Temperatures - High Pressures
Issue number3
Publication statusPublished - 2017
Externally publishedYes


  • Chalcogenide
  • Density measurements
  • Phase change random access memory
  • SbTe
  • Sessile drop method
  • Solid and molten
  • Thermoelectric materials

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanics of Materials
  • Physical and Theoretical Chemistry


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