Bulletin of materials science | |
Preparation of nanocrystalline ferroelectric BaNb2O6 by citrate gel method | |
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
【 预 览 】
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