Abstract
We investigate the dielectric, ferroelectric, and energy density properties of Pb-free (1 − x)BZT–xBCT ceramic capacitors at higher sintering temperature (1600 °C). A significant increase in the dielectric constant, with relatively low loss was observed for the investigated {Ba(Zr0.2Ti0.8)O3}(1−x ){(Ba0.7Ca0.3)TiO3} x (x = 0.10, 0.15, 0.20) ceramics; however, electric breakdown was low (~140, 170, 134 kV/cm), and of which room temperature (300 K) charging curve energy density values are largest ~0.88, 0.94, and 0.87 J/cm3 with maximum high dielectric constant values ~7800, 8400, and 5200, respectively. Bulk ceramic BZT–BCT materials have shown interesting energy densities with good energy storage efficiency (~72 %) at high sintering temperature; they might be one of the strong candidates for high energy density capacitor applications in an environmentally protective atmosphere.
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Acknowledgements
This study was supported by the National Science Foundation under Grant No. NSF-EFRI # 1038272. The authors are also thankful to Cristina Diaz Borrero, Material Characterization Center, University of Puerto Rico for doing SEM measurements. Author Venkata S. Puli thank D. Kishore Kumar, Department of chemistry, UPR, RP, for useful discussions.
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Puli, V.S., Pradhan, D.K., Chrisey, D.B. et al. Structure, dielectric, ferroelectric, and energy density properties of (1 − x)BZT–xBCT ceramic capacitors for energy storage applications. J Mater Sci 48, 2151–2157 (2013). https://doi.org/10.1007/s10853-012-6990-1
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DOI: https://doi.org/10.1007/s10853-012-6990-1