Co-precipitation method for the preparation of ferroelectric CaBi4Ti4O15



A simple co-precipitation technique has been successfully applied for the preparation of pure single phase CaBi4Ti4O15 (CBT) powders. Ammonium oxalate and ammonium hydroxide were used to precipitate Ca2+, Bi3+ and Ti4+ cations simultaneously. No pyrochlore phase was found while heating powder at 600 C and pure CBT phase was found to be formed by X-ray diffraction. Particle size and morphology was studied by transmission electron microscopy (TEM). The room temperature dielectric constant at 1 kHz is 400. The ferroelectric hysteresis loop parameters of these samples were also studied.


Ammonium Transmission Electron Microscopy Hydroxide Dielectric Constant Oxalate 
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© Springer Science + Business Media, Inc. 2005

Authors and Affiliations

  1. 1.Physical and Materials Chemistry DivisionNational Chemical LaboratoryPuneIndia

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