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Applicant:
Central University of Tamil Nadu 
Author:
A. R. Jayakrishnan, Kevin V. Alex, K. Kamakshi, J. P. B. Silva, K. C. Sekhar, M. J. M. Gomes 
Corresponding Authors:
K. C. Sekhar 
DOI #:
https://doi.org/10.1007/s10854-019-02299-5 
Title:
Enhancing the dielectric relaxor behavior and energy storage properties of 0.6Ba(Zr0.2Ti0.8)O3–0.4(Ba0.7Ca0.3)TiO3 ceramics through the incorporation of paraelectric SrTiO3 
Journal:
Journal of Materials Science: Materials in Electronics 
Year:
2019 
Volume:
30 
Page:
19374–19382 
Keywords:
Lead-free ceramics, Energy storage capacitors, Ferroelectric polarisation, Relaxor dielectrics, Power density 
Abstract:
Recently, relaxor ferroelectric materials have been attracting considerable attention as energy storage capacitors due to their potential applications in pulsed power systems. In this work, lead-free (1−x)[0.6Ba(Zr0.2Ti0.8)O3–0.4(Ba0.7Ca0.3)TiO3]–xSrTiO3 [(1−x)BZCT–xSTO] relaxor ceramics have been synthesized and their relaxor behavior is modulated via STO doping content. The incorporation of STO weakens the ferroelectric long-range order in BZCT, which favors the relaxor behavior, as experimentally proved by temperature dependent dielectric spectroscopy and polarization–electric field studies. The compositional dependence of energy storage properties in (1−x)BZCT–xSTO ceramics gave the optimum value at x = 0.15. Further, 0.85BZCT–0.15STO ceramics show the highest energy storage performance with a recoverable energy density of 0.987 J/cm3, efficiency of 84%, and high power density of 1.93 × 105 W/cm3 at an electric field of 108 kV/cm. Our ceramics show superior performance compared to previously reported values in BZCT based lead-free ceramics. The results reported here demonstrate that (1−x) BZCT–xSTO ceramics are potential candidates for energy storage capacitor applications. 
Entered by:
Koppole Chandra Sekhar on 2020-09-02 
 
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