Phase equilibria in the titanium-iron-oxygen system

Satoshi Itoh, Takeshi Azakami, Kimio Itagaki, Atsushi Kikuchi

Research output: Contribution to conferencePaper

1 Citation (Scopus)

Abstract

Phase relations and the equilibrium partial pressures of oxygen in the titanium-iron-oxygen ternary system have been studied in the temperature range of 1173 to 1373 K by means of a thermogravimetric method in a CO-CO2 gas mixtures and X-ray diffraction technique for the quenched samples after the equilibrium experiments. The objective of this study is both to clarify the relation between the phase relations in the Ti-Fe-O ternary system and the equilibrium partial pressures of oxygen, and to discuss the possibility of upgrading natural ilmenite ore to a rutile substitute for extractive metallurgy of titanium. The results are summarized as follows: The phase diagram and isobars of oxygen in the titanium-iron-oxygen ternary system at 1173, 1273 and 1373 K have been determined. From the present results upgrading ilmenite (FeTiO3) to a rutile (TiO2) substitute is possible thermodynamically. Both the activities of magnetite and ulvospinel show negative deviations from Raoult's law in the Fe3O4-Fe2TiO4 solid solutions coexisting with metallic iron at 1173-1373 K.

Original languageEnglish
Pages203-218
Number of pages16
Publication statusPublished - 1997 Dec 1
EventProceedings of the 1997 126th TMS Annual Meeting - Indianapolis, IN, USA
Duration: 1997 Sep 141997 Sep 18

Other

OtherProceedings of the 1997 126th TMS Annual Meeting
CityIndianapolis, IN, USA
Period97/9/1497/9/18

ASJC Scopus subject areas

  • Engineering(all)

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    Itoh, S., Azakami, T., Itagaki, K., & Kikuchi, A. (1997). Phase equilibria in the titanium-iron-oxygen system. 203-218. Paper presented at Proceedings of the 1997 126th TMS Annual Meeting, Indianapolis, IN, USA, .