Phase equilibrium and activities of Fe-S-O melts

Shigeru Ueda*, Katsunori Yamaguchi, Yoichi Takeda

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)


Phase equilibrium and oxygen partial pressure for the Fe-S-O system from eutectic temperature to 1673 K were investigated by chemical equilibrium techniques and the EMF method. The liquid phase is saturated with Fe, FeO, Fe3O4 and FeS. The partial pressure of oxygen increases remarkably with departing from the liquidus saturated with Fe. According to the Gibbs-Duhem equation and Schumann's method, the activities of Fe and the partial pressure of S2 for the liquid phase are derived.

Original languageEnglish
Pages (from-to)572-578
Number of pages7
JournalMaterials Transactions
Issue number3
Publication statusPublished - 2008 Mar
Externally publishedYes


  • Activity
  • Iron-sulfur-oxygen system
  • Phase diagram
  • Thermodynamics

ASJC Scopus subject areas

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


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