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

被引：162

作者：

Gennari, FC ^{[1
]}

Pasquevich, DM

机构：

[1] Comis Nacl Energia Atom, Ctr Atom Bariloche, RA-8400 San Carlos De Bariloche, Rio Negro, Argentina

[2] Consejo Nacl Invest Cient & Tecn, Buenos Aires, DF, Argentina

来源：

JOURNAL OF MATERIALS SCIENCE | 1998年 / 33卷 / 06期

关键词：

D O I：

10.1023/A:1017515804370

中图分类号：

T [工业技术];

学科分类号：

08 ;

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 degrees 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 formaiton of oxygen vacanies. (C) 1998 Chapman & Hall.

引用

页码：1571 / 1578

页数：8

共 40 条

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