Abstract
In order to prepare the pure (K, Na)NbO 3(KNN) particles with higher crystallinity, the high temperature mixing method (HTMM) under hydrothermal conditions was carried out in this work. The obtained samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), selected area electron diffraction (SAED), and high-resolution transmission electron microscopy (HRTEM). The results indicate that the KNN particles size decrease gradually with the increase of mineralization concentration in the starting solution. The ratio of K +/(K + + Na +) in the starting solution has a great effect on the phase of the products, and several phases coexist in the product when the ratio of K +/(K + + Na +) in the starting solution is 0.7.
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