Morphology-Controlled Synthesis of Potassium Niobate Nanostructures

作者：Ge Haiyan^*; Hou Yudong; Xiao Han; Zhu Mankang; Wang Hao; Yan Hui

来源：Rare Metal Materials and Engineering, 2012, 41: 154-156.

• molten salt synthesis method
• KNbO3
• nanostructures
• morphology-controlled

A convenient, simplistic and large-scale molten salt synthetic methodology was developed to synthesize the morphology-controlled nanostructures such as cube-shaped and rod-shaped KNbO3. This method synthesized products from a reaction of K2CO3 and Nb2O5 with the molten-salt medium. The powder X-ray diffraction and transmission electron microscopy were used to investigate the structure and morphology of the products. The formation mechanism of KNbO3 with controlled morphologies was analyzed. Firstly, the K2CO3 diffused onto the Nb2O5 surfaces to form K2O-shell in the molten salts, followed by the nucleation and growth of KNbO3. The rod-like structures of KNbO3 were originated from the directed aggregation of nanoparticles by the electrostatic interactions. However, in high temperature environment, the rod shaped KNbO3 had the chance to break up into several fragments from the grain boundaries, resulting in the individual submicron-scale cubes in the molten salt.

• 出版日期2012-11
• 单位北京工业大学