Synthesis of Hematite Nanostructures by Wet Ball Milling and Compared with Sol-gel Method

In this research, the structural characteristics of hematite nano-particles synthesized by a wet ball milling have been investigated. The evolution of morphology and microstructure of the powders during milling was investigated using SEM, TEM and XRD. The crystallite size was evaluated by XRD patterns using Williamson-Hall methods. The lattice strain of hematite powder synthesized by this method increase with a increasing of milling times, while the average particle size decrease. However, XRD and TEM estimated the average particle size of the hematite nanoparticles about 30 and 12 nm, respectively. Also the uniform dispersion and spherical powder morphology, is well visible in SEM image. Finally, the synthesis results using wet ball milling and sol-gel method has been compared.