Abstract
In this paper we report about the particle size controlling factors on various perovskite metal oxide, XTiO3 (X = Ca, Sr, Ba, Pb), nanoparticles by hydrothermal synthesis in supercritical water of 400 °C and 30 MPa. Experiments were performed the developed flow reaction system. Characteristics of the product were performed by X-ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy equipped with energy dispersive X-ray spectrometry (SEM-EDS) and nitrogen adsorption. The behavior of particle growth of perovskite metal oxides depended on A-site metal ions and the order of the particle size was Sr < Ca < Ba < Pb. The particle growth of perovskite metal oxide in supercritical water could be affected by solubility of A site ions.
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