Hydrothermal Synthesis of Surface Modified SrTiO3 Powders

Using crude materials of industrial product TiCl4, ordinary reagent Sr(NO3)2 and KOH, by adding surface active agent dodecylbenzenesulphonic acid (DBS), the nanosized SrTiO3 partide modified with a layer of DBS were successfuly prepared through the hydrothermal method and their microstructure were characteried. FTIR, DAT and TG were used for the determination of the components. It can be proved that the nanosized SrTiO3 were capped by a layer of DBS. The sizes, shapes and crystal phase were determined by TEM and XRD. The results indicate that the product are cabic phase, small crystal (size distribution and Little agglomeration. The average size of the powders is about 120nm. The average size of layer of DBS is about 6 nm. In contrast with the bulk SrTiO3 The polarity of nanometer SrTiO3 powder wass changed by coating with a layer of DBS.