Preparation of nanocrystalline ferroelectric BaNb2O6 by citrate gel method

Bulletin of materials science

V Ravi¹  S P Gaikwad¹  Renu Pasricha²  Violet Samuel³ 

[1] Physical and Materials Chemistry Division, National Chemical Laboratory, Pune 411 008, India$$Physical and Materials Chemistry Division, National Chemical Laboratory, Pune 411 008, IndiaPhysical and Materials Chemistry Division, National Chemical Laboratory, Pune 411 008, India$$;Centre for Materials Characterization, National Chemical Laboratory, Pune 411 008, India$$Centre for Materials Characterization, National Chemical Laboratory, Pune 411 008, IndiaCentre for Materials Characterization, National Chemical Laboratory, Pune 411 008, India$$;Catalysis Division, National Chemical Laboratory, Pune 411 008, India$$Catalysis Division, National Chemical Laboratory, Pune 411 008, IndiaCatalysis Division, National Chemical Laboratory, Pune 411 008, India$$

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

DOI  :  

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】

Unknown