Effect of the Sintering Temperature on Nanocrystalline Non-stoichiometric Sr0.8Bi2.2Ta2O9Ferroelectric Ceramics

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In the present work, nanocrystalline non-stoichiometric strontium bismuth tantalate (SBT) of composition Sr0.8Bi2.2Ta2O9 was synthesized by mechanical activation technique using a high energy planetary ball mill. The synthesized powder was sintered at different sintering temperature i.e. 1050°C, 1100°C, 1150°C. X-ray diffractograms reveal the formation of single phase layered perovskite structure in all samples sintered at various temperatures. Scanning electron microscopy (SEM) and Transmission electron microscopy (TEM) have been used for the microstructural investigation. Detailed dielectric, ferroelectric and piezoelectric properties have been studied as a function of sintering temperature. Present study reveals that the electrical properties of the synthesized samples are sensitive to the sintering temperature variation.