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High dielectric performance of three-component nanocomposites induced by a synergetic effect

Authors
Publisher
Elsevier B.V.
Publication Date
Volume
64
Issue
24
Identifiers
DOI: 10.1016/j.matlet.2010.09.001
Keywords
  • Dielectrics
  • Nanocomposites
  • Microstructure
  • Synergetic Effect

Abstract

Abstract Nanosized BaTiO 3 (NBT) was introduced into multi-walled carbon nanotube (MWNT)/poly(vinylidene fluoride) (PVDF) composite with fixed MWNT loading to explore the effect of secondary ceramic filler on dielectric properties of three-component composite. The dielectric constant of (NBT–MWNT)/PVDF composite was enhanced significantly (338 → 637) while the AC conductivity was decreased (7.75 × 10 − 3 S m − 1 → 3.53 × 10 − 4 S m − 1 ) when the volume concentration of NBT was increased up to 0.20. The reason can be the space charge polarization nature and a synergetic effect of NBT/MWNT loading. This can be further confirmed by using an equivalent circuit model to analyze the impedance data.

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