TU Na ,JIANG Xiangping, CHEN Chao ,LI Xiaohong ,LI Yueming

(Department of Material Science and Engineering, Jingdezhen Ceramic Institute, Jingdezhen 333001)

Abstract: Sodium niobate fine powders were successfully prepared by hydrothermal method using Nb₂O₅ and NaOH as raw materials at 180℃~200℃. The phase of the powers was investigated by X-ray diffraction (XRD), the morphology and the size of crystal grain were investigated by scanning electron microscopy (SEM). The results indicate that NaNbO₃ powders were identified to be orthorhombic structure and the unit cell parameters were a=5.569A, b=15.523A, c=5.505A. It was found that the speed of the reaction ratio was enhanced with the increasing of reaction temperature, and the size of crystal grain developed well with the increasing of reaction time.

Keywords: hydrothermal synthesis, NaNbO₃, powers