Journal of Electroceramics

, Volume 18, Issue 3–4, pp 269–276 | Cite as

Glass-ceramics of barium strontium titanate for high energy density capacitors

  • E. P. Gorzkowski
  • M.-J. Pan
  • B. Bender
  • C. C. M. Wu
Article
First Online:
Received:
Accepted:

Abstract

Barium strontium titanate glass-ceramics were successfully produced with one major crystalline phase when Al2O3 was added to the melt. A dielectric constant of 1000 and a breakdown strength of 800 kV/cm was achieved; however the energy density was only measured to be 0.3–0.9 J/cm3. These energy density values were lower than anticipated due to the presence of dendrites and pores in the microstructure. Using BaF2 as a refining agent improved the microstructure and doubled the energy density for BST 80/20 samples. However, no refining agent reduced the increasing amount of hysteresis that developed with increasing applied electric field. This phenomenon is believed to be due to interfacial polarization.

Keywords

Glass-ceramic Breakdown strength Ferroelectric materials 
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Notes

Acknowledgments

This research was performed while the author held a National Research Council Research Associateship Award at the U.S. Naval Research Laboratory. The authors would also like to acknowledge funding from the Office of Naval Research under contract #N0001404WX20802.

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Copyright information

© Springer Science+Business Media, LLC 2007

Authors and Affiliations

  • E. P. Gorzkowski
    • 1
  • M.-J. Pan
    • 1
  • B. Bender
    • 1
  • C. C. M. Wu
    • 1
  1. 1.Multifunctional Materials BranchThe Naval Research LaboratoryWashington, DCUSA

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