Abstract
In the present study, the phase evolution of BaBi2Nb2O9 (BBN) composition prepared by solid-state reaction method have been studied. The detailed study for the formation of pure perovskite phase has been performed at a wide calcination temperature in the range of 700 °C–950 °C followed by sintering the ceramic at 1050 °C. The presence of a secondary phase is identified along with the formation of the desired BaBi2Nb2O9 phase and is found to decrease with increasing calcination temperature. High resolution (HRXRD) depicts the evolution of single-phase BaBi2Nb2O9 ceramic with an orthorhombic unit cell associated with the Fmmm space group at 950 °C, while SEM microstructural studies revealed the formation of dense plate-like grains on sintering the ceramic at 1050 °C. The optimum calcination temperature and sintering temperature were successfully investigated without any impurity traces for the application of high-temperature piezoelectricity and sensors.
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