Phase equilibria of the Sn-Sb binary system

Sinn Wen Chen*, Chih Chi Chen, Wojcieh Gierlotka, An Ren Zi, Po Yin Chen, Hsin-Jay Wu

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

86 Scopus citations


Sn-Sb alloys are important high-temperature solders. However, inconsistencies are found in the available phase diagrams, and some phase boundaries in the Sn-Sb system have not been determined. Sn-Sb alloys were prepared, equilibrated at 160°C to 300°C, and the equilibrium phases and their compositions were determined. The β-SnSb phase has a very wide compositional homogeneity range, and its composition varies from Sn-47.0at.%Sb to Sn-62.8at.%Sb. There is no order-disorder transformation of the β-SnSb phase. There are three peritectic reactions in the Sn-Sb system, L + Sb = β-SnSb, L + β-SnSb = Sn 3Sb 2, and L + Sn 3Sb 2 = Sn, and their temperatures are 424°C, 323°C, and 243°C, respectively. Thermodynamic models of the Sn-Sb binary system were developed using the CALPHAD approach based on the experimental results of this study and the data in the literature. The calculated phase diagram and thermodynamic properties are in good agreement with the experimental determinations.

Original languageEnglish
Pages (from-to)992-1002
Number of pages11
JournalJournal of Electronic Materials
Issue number7
StatePublished - 1 Jul 2008


  • DTA
  • Sb
  • Sn
  • Thermodynamics

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