Preparation of nanocrystalline ferroelectric BaNb2O6 by citrate gel method

Bulletin of Materials Science

关键词: Ceramics;    electronic material;    oxides;    chemical synthesis;    ferroelectricity.;   

学科分类：材料工程

来源: Indian Academy of Sciences

【 摘 要 】

A gel was formed when a aqueous solution of BaCl2, NbF5 and citric acid in stoichiometric ratio is heated on a water bath. This gel on decomposition at 600°C yielded the nano crystallites of BaNb2O6, as confirmed by X-ray diffraction study (XRD). This is a much lower temperature as compared to that prepared by traditional solid state method (1000°C) as reported for the formation of BaNb2O6. Transmission electron microscopic (TEM) investigations revealed that the average particle size is 50 nm for the calcined powders. The room temperature dielectric constant at 1 kHz is found to be 1000. The ferroelectric hysteresis loop parameters of these samples were also studied.

【 授权许可】

CC BY