Experimental study on phase transformation of TiO ₂ induced by high energy milling

The mixture of TiO ₂ and dicyandiamide powder is processed by high energy milling at different milling speed and milling time. The structure and phase composition of the recovered samples are determined by X-ray diffraction (XRD). The results show that anatase transforms to rutile and srilankite appears at milling speed of 700 r/min. With milling time increasing, srilankite high-pressure phase content increases and gradually approaches a constant value. When the milling speed is raised to 1000 r/min, the transformation of anatase to srilankite is dominant, and the mass fraction of srilankite high-pressure phase is increased greatly to 47.8%.