Thermodynamics study on the titanium-iron-oxygen system at 1173 K

Satoshi Itoh, Takeshi Azakami

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1 Citation (Scopus)


Phase relations in the Ti-Fe-O ternary system and the equilibrium partial pressures of oxygen have been determined at 1173 K using a thermogravimetric technique in CO-CO2 gas mixtures. The results indicate that upgrading ilmenite to rutile is basically possible and its possibility was confirmed experimentally. The standard Gibbs energy of the reactions at 1173 K were also obtained as follows: Fe(s)+FeTiO3(s)+ 1/2 O2(g)=Fe2TiO4(s), -197.4kJ·mol-1, Fe(s)+TiO2(s)+ 1/2 O2(g)=FeTiO3(s), -208.6kJ·mol-1. Both the activities of magnetite and ulvospinel in the Fe3O4-Fe2TiO4 solid solutions coexisting with metallic iron at 1173 K show negative deviations from Raoult's law.

Original languageEnglish
Pages (from-to)15-29
Number of pages15
JournalMetallurgical Review of MMIJ (Mining and Metallurgical Institute of Japan)
Issue number2
Publication statusPublished - 1995 Dec 1

ASJC Scopus subject areas

  • Metals and Alloys


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