Coprecipitation method for the preparation of nanocrystalline ferroelectric CaBi2Ta2O9

A simple coprecipitation technique had been successfully applied for the preparation of pure ultrafine single-phase CaBi2Ta2O9 (CBT) Ammonium hydroxide and ammonium oxalate were used to precipitate Ca2+, Bi3+ and Ta5+ cations simultaneously. No pyrochlore phase was found while heating powder at 800...

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Published inMaterials letters Vol. 58; no. 27-28; pp. 3474 - 3476
Main Authors Gaikwad, S P, Dhesphande, S B, Khollam, Y B, Samuel, Violet, Ravi, V
Format Journal Article
LanguageEnglish
Published 01.11.2004
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Summary:A simple coprecipitation technique had been successfully applied for the preparation of pure ultrafine single-phase CaBi2Ta2O9 (CBT) Ammonium hydroxide and ammonium oxalate were used to precipitate Ca2+, Bi3+ and Ta5+ cations simultaneously. No pyrochlore phase was found while heating powder at 800 DGC and pure CaBi2Ta2O9 phase was found to be formed by XRD. Particle size and morphology was studied by transmission electron microscopy (TEM). The room temperature dielectric constant at 1 kHz is 100. The ferroelectric hysteresis loop parameters of these samples were also studied.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
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ISSN:0167-577X
DOI:10.1016/j.matlet.2004.07.004