Active and Passive Electronic Components (Jan 2009)

Dielectric Behavior of Ceramic (BST)/Epoxy Thick Films

  • N. Hadik,
  • A. Outzourhit,
  • A. Elmansouri,
  • A. Abouelaoualim,
  • A. Oueriagli,
  • E. L. Ameziane

DOI
https://doi.org/10.1155/2009/437130
Journal volume & issue
Vol. 2009

Abstract

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Composite materials were made by mixing powders of Ba1−xSrxTiO3 (x=0.2 and 0.4) ceramics and epoxy resin with various volume fractions (vol%). Dielectric measurements of these composites were performed as a function of filler ratio in the range 100–360°K at 10 KHz. The dielectric constant of the composite increased with increasing volume fraction varies slightly with temperature. The 20 vol% of BST(0.4)-epoxy composite had the highest dielectric constant of 19.4 and dielectric loss tangent of 0.027. Among the dielectric mixing models presented, the model of Lichtenecker shows the best fit to the experimental data for both composites.