Microstructure characterization of polymorphic transformed ball-milled anatase TiO2 by Rietveld method

Rietveld's whole powder profile fitting method based on crystal structure refinement is applied to extract the microstructure information of several polymorphic TiO2 phases grown simultaneously during high-energy planetary ball milling of anatase phase. The advantages of the present method of analysis over the other methods of X-ray line profile analysis are discussed in detail. Particle size and lattice strain values of all the phases are found to be anisotropic for the first time and the polymorphic phase transformations have been analyzed in this light.