Preparation and characterization of nanocrystalline titania powders by sonochemical synthesis

► Nanocrystalline titania powders were synthesized during ultrasonically treatment. ► Ultrasonic irradiation favors the formation of brookite phase. ► 5 nm crystallites in mesoporous powders created surface areas as high as 287 m2/g. ► Sintering behavior was controlled by 7-10 nm crystallites and submicron aggregates. ► Densification curves may provide useful information on powder characterization.