Structure and electrical properties of 0.80 Na0.5 Bi0.5 TiO3-0.16 K0.5 Bi0.5 TiO3-0.04 BaTiO3 lead-free piezoelectric ceramics

Lead free pervoskite 0.80 Na0.5 Bi0.5 TiO3-0.16 K0.5 Bi0.5 TiO3-0.04 BaTiO3 (NKBBT) ceramics were fabricated via conventional solid state processing technique sintered at 1200 °C and their crystal structures and electrical properties were systematically studied. Structure of the prepared NKBBT ceram...

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Bibliographic Details
Main Authors: Aravinth, K., Muneeswaran, M., Babu, G. Anandha, Giridharan, N. V., Ramasamy, P.
Format: Conference Proceeding
Language:English
Subjects:
Barium titanates
Ceramic powders
Coercivity
Crystal structure
Dependence
Dielectric relaxation
Electric fields
Electrical properties
Ferroelectric materials
Ferroelectricity
Hysteresis loops
Lead free
Permittivity
Piezoelectric ceramics
Piezoelectricity
Polarization
Relaxors
Sintering (powder metallurgy)
X ray powder diffraction
X-ray diffraction
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Summary:Lead free pervoskite 0.80 Na0.5 Bi0.5 TiO3-0.16 K0.5 Bi0.5 TiO3-0.04 BaTiO3 (NKBBT) ceramics were fabricated via conventional solid state processing technique sintered at 1200 °C and their crystal structures and electrical properties were systematically studied. Structure of the prepared NKBBT ceramics was confirmed by Powder X-ray diffraction analysis. The dependence of dielectric constant on temperature for various frequencies (100 Hz-100 KHz) has been determined. The diffuse transition is observed in the variation of dielectric constant and it provides evidence for the relaxor characteristics. The ferroelectric response of the NKBBT ceramics with different frequency was studied. Polarisation electric field hysteresis loops revealed that the remnant polarization is 6.88 µC/cm2 and coercive electric field is 66.42 kV/cm.
ISSN:0094-243X
1551-7616
DOI:10.1063/1.4948011