A co-precipitation technique for the preparation of ferroelectric BaBi2Ta2O9

Abstract A simple co-precipitation technique had been successfully applied for the preparation of pure ultrafine single phase BaBi 2 Ta 2 O 9 (BBT). Ammonium hydroxide and ammonium oxalate were used to precipitate Ba 2+ , Bi 3+ and Ta 5+ cations simultaneously. No pyrochlore phase was found while heating powder at 800 °C and pure BaBi 2 Ta 2 O 9 phase was found to be formed by X-ray diffraction. Particle size and morphology was studied by transmission electron spectroscopy (TEM). The room temperature dielectric constant at 1 kHz is 350. The ferroelectric hysteresis loop parameters of these samples were also studied.