Ultrasonic–Assisted Co–Precipitation Method of Preparation of Nanocomposites in the Al2O3–TiO2–ZrO2 System: Characterization and Microsturcture

Recently, the ahch-tich-zrch system has found valuable applications, particularly, as a support for noxstorage-reduction (nsr) catalysts. nanocomposite powders were prepared from the co-precipitation methodin inorganic precursors. the behaviors of mixed oxide nanoparticles under ultrasonic irradiation, such asdispersion, and crushing were studied. phase transformations, crystallite size, and microstructure of themixed oxides were investigated by sta (dta/tg), ftir, xrd, and sem. xrd studies showed thatzirconium titanate (zt) is main phase, and the crystallite size varies with the final calcination temperature,and ultrasonic irradiations. sem observations revealed that the calcination temperature strongly influencesthe morphology of prepared mixed oxides. the results showed that the inorganic nanoparticles in theaqueous solution can be redispersed more effectively by ultrasonic irradiation than by conventional stirring.the average crystallite sizes of the zt particles heat treated at 1200 °c for 2 h were in the range of 47-85nm.