[20p-A304-1~15] 9.1 誘電材料・誘電体

▲ [20p-A304-8] Size control of NaNbO₃ Nanocubes and the Dielectric Properties of their Assembly

〇(P)Piyush Sapkota¹、Hyunwook Nam¹、Kazuki Osada¹、Ichiro Fujii¹、Satoshi Wada¹、Shintaro Ueno¹ (1.Univ. of Yamanashi)

キーワード：Sodium Niobate, Nanocubes, Solvothermal synthesis

The NaNbO₃ nanocubes with controlled sizes of less than 100 nm have rarely been reported. Therefore, in this study, we focused on the size control of the NaNbO₃ nanocubes synthesized using surfactant-free solvothermal method.The NaNbO₃ nanocubes were prepared in two steps. In the first step, the Nb₂O₅ sol was prepared using Ammonium niobium (V) oxalate hydrate, as it is hydrolysis resistant at ambient conditions. In the second step, NaNbO₃ nanocubes were synthesized using microwave synthesis. The formed NaNbO₃ nanocubes exhibited single phase perovskite structure in X-ray diffraction studies. The size of the nanocubes were estimated to be 50 – 60 nm by Scanning electron microscope images. In our lab, we are focused on the assembly formation of nanocubes using two-solvent method and capillary action. Therefore, the assembly formation of the NaNbO₃ nanocubes and their dielectric properties are under investigation and the results will be reported during the presentation.