Abstract
A precipitate was formed when a aqueous solution of CaCl 2, BiCl 3, TaF 5 and urea in stoichiometric ratio (total metal cations to urea ratio is 5) is heated on a water bath. This precipitate on decomposition at 600 °C yielded the nanocrystallites of ternary oxide CaBi 2Ta 2O 9 (CBT) as confirmed by X-ray diffraction (XRD). Particle size and morphology was studied by transmission electron spectroscopy (TEM). Ferroelectric hysteresis loop parameters such as remnant polarization ( P r) and coercive field ( E C) were also determined. TEM investigations revealed that the average particle size of the polycrystalline powder is 70 nm. The room temperature dielectric constant was found to be 110.
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