Preparation of SrTiO₃ nanomaterial by a sol–gel-hydrothermal method

摘要

A new synthetic route to obtain high-purity strontium titanate, SrTiO₃, using the sol–gel-hydrothermal reaction of TiCl₄ and a SrCl₂ solution in an oxygen atmosphere has been developed. In the synthesized products the SrTiO₃ nanoparticles are nearly spherical and decrease in size with the reaction time (48 h) down to a diameter of about 40 nm. The microstructure and composition of the as-synthesized samples were investigated by X-ray diffraction (XRD), high-resolution TEM (HRTEM), Raman spectroscopy, atomic force microscopy (AFM), and energy-dispersive X-ray spectroscopy (EDX). All the samples were identified as cubic perovskite phase.