Skip to main content
Article
HP007 Modeling Permittivity and Conductivity Contrast on Electric Energy Storage Properties of Dielectric Composites
Applications of Ferroelectrics
  • Xuhui Lu
  • Robert W. Schwartz, Missouri University of Science and Technology
  • Wayne Huebner, Missouri University of Science and Technology
Abstract

The electric field distribution, field and power density enhancement factors, power loss and stored electric energy in dielectric composites were calculated using the boundary-element method (BEM). The composites consist of a low permittivity host containing either spherical conducting inclusions having dielectric coating shells, or dielectrically or conductively graded spherical dielectric particles. It is shown that the local electric field and power density enhancement effects diminish as the thickness of shells, the number of grading layers or the degree of nonlinearity of grading increases. The reduced enhancement effects significantly increase the normalized stored electric energy due to the fact that with a reduced enhancement factor a higher voltage can be applied. Frequency effects for composites with conductivity-graded particles were also considered. The results of these studies have implications for the design of high energy density dielectric composites.

Department(s)
Materials Science and Engineering
Keywords and Phrases
  • Conducting Materials,
  • Conductivity,
  • Dielectric Breakdown,
  • Dielectric Losses,
  • Dielectric Materials,
  • Dielectrics and Electrical Insulation,
  • Energy Storage,
  • Frequency,
  • Materials Science and Technology,
  • Permittivity
Document Type
Article - Conference proceedings
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 2008 Institute of Electrical and Electronics Engineers (IEEE), All rights reserved.
Publication Date
2-1-2008
Citation Information
Xuhui Lu, Robert W. Schwartz and Wayne Huebner. "HP007 Modeling Permittivity and Conductivity Contrast on Electric Energy Storage Properties of Dielectric Composites" Applications of Ferroelectrics (2008)
Available at: http://works.bepress.com/wayne-huebner/21/