Journal of Materials Science

, Volume 33, Issue 6, pp 1571–1578

Kinetics of the anatase–rutile transformation in TiO2 in the presence of Fe2O3

Article

DOI: 10.1023/A:1017515804370

Cite this article as:
Gennari, F.C. & Pasquevich, D.M. Journal of Materials Science (1998) 33: 1571. doi:10.1023/A:1017515804370

Abstract

The anatase–rutile phase transition in TiO2 in the presence of Fe2O3 was investigated in air and argon atmospheres by means of X-ray diffraction and scanning electron microscopy. Isothermal curves of rutile transformed from anatase as a function of time were obtained between 825 and 950 °C. The data were well fitted by various rate laws. In the presence of Fe3+, the anatase–rutile transition temperature is lower and the transformation rate in air is higher than the corresponding one in pure TiO2. The transformation in the presence of Fe3+ in an argon atmosphere is more rapid than in air. The enhancement effect of Fe3+ on the anatase–rutile transformation in both atmospheres is understood on the basis of the formation of oxygen vacancies.

Copyright information

© Kluwer Academic Publishers 1998

Authors and Affiliations

  1. 1.Comisión Nacional de Energía Atómica, Centro Atómico Bariloche, (8400) s.c. de BarilocheRío NegroArgentina