Non monotonic lattice parameter variation in ball milled 23/06/2015· High energy ball milling is utilized in creating microstructural changes such as change in lattice parameter lattice strain within micro ceria which were quantified using line profile analysis by X ray diffraction Crystallite size significantly decreased from 85 to 11 nm when subjected to 4 h of high energy ball milling and then remained same with increase in milling duration up to 16 h