Synthesis of needle-like NaNbO3 particles by hydrothermal process

In this study, sodium niobate powders were prepared by hydrothermal process for further use as template particles in the texturing of piezoelectric potassium sodium niobate fibers. At the end of the study, three different structures were obtained: Sodium hexaniobate particles with rod-like morphology at 120°C, particles with partially needle- like morphology at 130°C-140°C and SOMS particles with totally needle-like morphology at 150°C. Finally, sodium niobate particles with cubic morphology were obtained at 160°C and above. Rod-like and needle-like morphology was retained even after annealing at 400°C. SOMS particles were sintered at 1135°C for 1 hour and transmission electron microscopy study was carried out to investigate their morphological and structural changes explain after annealing.