Phase Transformation of Nanocrystalline Anatase Powders Induced by Mechanical Activation

Abstract

The microstructural evolution of nanocrystalline anatase TiO 2 during high‐energy planetary ball milling was studied. The results show that mechanical activation induces the transformations of nanocrystalline TiO 2 from anatase to srilankite and rutile at room temperature and under ambient pressure. As the milling time increases, more anatase powder transforms to the srilankite and rutile phase, and the particle size of the powder decreases. There is no indication of the formation of amorphous phase during ball milling.