Particle size dependent properties of Na0.5Bi0.5TiO3 synthesized using hydrothermal technique

Goutham, Cilaveni and Raavi, Sai Santosh Kumar and Asthana, Saket (2019) Particle size dependent properties of Na0.5Bi0.5TiO3 synthesized using hydrothermal technique. In: AIP Conference Proceedings 2082.

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Abstract

The single phase nano-crystalline lead-free Na0.5Bi0.5TiO3 (NBT) synthesized using hydrothermal technique produces homogeneous crystalline powders. The structural phase purity of these ceramic powders was confirmed by using room temperature X-ray diffraction and it revealed that the structure stabilizes in rhombohedral (R3c) phase. The microstructure from scanning electron microscopy clearly showed the cubic-type feature in orders of 100-200 nm with sharp face edges. The Curie temperature (TC), dielectric constant (εr) and other electrical properties are strongly dependent on the particle sizes. The dielectric constant (εr = 3100 at 100 kHz) is high in comparison to reported NBT synthesized using solid state route (εr = 2700 at 100 kHz). Additionally, diffusive phase transition was clearly observed in nano NBT powders which supports its tendency towards more relaxor behavior and will be a pertinent candidate to improve the energy storage capacity.

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