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

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 stabil...

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Bibliographic Details
Main Authors: Goutham, Cilaveni, Raavi, Sai Santhosh Kumar, Asthana, Saket
Format: Conference Proceeding
Language:English
Subjects:
Bismuth titanate
Ceramic powders
Crystal structure
Crystallinity
Curie temperature
Dielectric properties
Dielectric strength
Electrical properties
Energy storage
Lead free
Permittivity
Phase transitions
Relaxors
Scanning electron microscopy
Storage capacity
Synthesis
X-ray diffraction
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Summary: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.
ISSN:0094-243X
1551-7616
DOI:10.1063/1.5093828