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Journal of Materials Science

, Volume 48, Issue 5, pp 2151–2157 | Cite as

Structure, dielectric, ferroelectric, and energy density properties of (1 − x)BZT–xBCT ceramic capacitors for energy storage applications

  • Venkata Sreenivas PuliEmail author
  • Dhiren K. Pradhan
  • Douglas B. Chrisey
  • M. Tomozawa
  • G. L. Sharma
  • J. F. Scott
  • Ram S. KatiyarEmail author
Article

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.

Keywords

High Energy Density High Sinter Temperature Breakdown Strength Dielectric Breakdown Morphotropic Phase Boundary Composition 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

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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Copyright information

© Springer Science+Business Media New York 2012

Authors and Affiliations

  • Venkata Sreenivas Puli
    • 1
    Email author
  • Dhiren K. Pradhan
    • 1
  • Douglas B. Chrisey
    • 2
  • M. Tomozawa
    • 2
  • G. L. Sharma
    • 1
  • J. F. Scott
    • 3
  • Ram S. Katiyar
    • 1
    Email author
  1. 1.Department of Physics and Institute for Functional Nano MaterialsUniversity of Puerto RicoSan JuanUSA
  2. 2.Department of Materials Science and EngineeringRensselaer Polytechnic InstituteTroyUSA
  3. 3.Cavendish Laboratory, Department of PhysicsUniversity of CambridgeCambridgeUK

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