Hydrothermal synthesis of plate-like sodium niobate particles

Sodium niobate (NaNbO3) particles with perovskite structure and plate-like morphology were successfully prepared through calcining the plate-like hexagonal NaNbO3 particles that were synthesized by hydrothermal method. A single phase of hexagonal NaNbO3 was obtained under the condition of 200 °C and [OH−]=1.0 mol/L, and the particle size is about 15 μm in diameter and 2 μm in thickness. Through researching the effects of reaction temperature and concentration of OH−, the best condition to prepare the hexagonal NaNbO3 plate-like particles was investigated. After further calcination treatment, the particles were completely transformed into perovskite structure with the orthorhombic unit cell without morphology change. Compared with the traditional high temperature molten salt method, this work provides a simpler way to prepare NaNbO3 template for templated grain growth (TGG) or reactive templated grain growth (RTGG) texture techniques.