Thermodynamic study on the zinc-iron-oxygen system

Satoshi Itoh, Takeshi Azakami

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3 Citations (Scopus)


The Zn-Fe-O system can be divided thermodynamically into three regions: (i) Fe-Zn-ZnO-FeO system, (ii) FeO-ZnO-ZnFe2O4-Fe3O4 system and (iii) Fe3O4-ZnFe2O4-Fe2O3 system. Phase relations in each system have been studied at 1200 K by equilibrating synthetic samples in evacuated sealed quartz tubes. The results indicate that the phase relations at 1200 K are almost the same as that at 1100 K, while the mutual solid solubilities at 1200 K between ZnO and FeO are slightly larger than that at 1100 K. On the basis of the results and the previous data concerning the EMF using a stabilized zirconium oxide solid electrolyte, the equilibrium partial pressures of oxygen, -log pO(2)(=-log (PO(2)/P)), at 1200 K were thus estimated as follows: 20-16 for region (i), 14-12 for region (ii) and 6-3 for region (iii), respectively. The activities of the components in Fe-Zn, FeO-ZnO and Fe3O4-ZnFe2O4 systems were then obtained by applying the Gibbs-Duhem relation in each region.

Original languageEnglish
Pages (from-to)1288-1293
Number of pages6
JournalNippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals
Issue number11
Publication statusPublished - 1994

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys
  • Materials Chemistry


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