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

被引：0
作者：
F. C. Gennari
D. M. Pasquevich
机构：
[1] Comisión Nacional de Energía Atómica,
[2] Centro Atómico Bariloche,undefined
[3] (8400) s.c. de Bariloche,undefined
来源：
Journal of Materials Science | 1998年 / 33卷
关键词：
Oxygen; Polymer; Atmosphere; Microscopy; Electron Microscopy;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
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.
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页码：1571 / 1578
页数：7
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