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Journal of Materials Science

, Volume 42, Issue 16, pp 6477–6488 | Cite as

Impedance and modulus spectra of the percolation system silicon–polyester resin and their analysis using the two exponent phenomenological percolation equation

  • Godfrey Sauti
  • David S. McLachlan
Article

Abstract

The ac conductivity of silicon–polyester resin composites is found to be best fitted using the two exponent phenomenological percolation equation (TEPPE) (formerly known as the general effective media (GEM) equation). The results show that, with the actual experimentally measured components’ electrical properties as input, the TEPPE can be used to model and fit the composites’ complex conductivity data. The paper also highlights the importance of using several representations of the immittance spectroscopy data in order to correctly identify the various contributions, for instance the modulus plots clearly show the arcs due to the isolated percolation clusters, below the critical volume fraction.

Keywords

Polyester Resin Percolation Cluster Conducting Component High Frequency Peak Pure Resin 
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

GS would like to acknowledge financial assistance from the TW Khambule GOOT Fellowship at the University of the Witwatersrand.

References

  1. 1.
    Novocontrol GmbH, Hundsangen, Germany (1994) Novocontrol broadband dielectric converter BDC: Owner’s manualGoogle Scholar
  2. 2.
    Sauti G (2005) Electrical conductivity and permittivity of ceramics and other composites. PhD thesis, Physics, University of the Witwatersrand, JohannesburgGoogle Scholar
  3. 3.
    Havriliak S, Negami J (1966) J Polym Sci C 14:99CrossRefGoogle Scholar
  4. 4.
    Schaumburg G (1995) Dielectrics Newslett, 9–12Google Scholar
  5. 5.
    Mijovic J, Fitz BD (1998) Novocontrol Applic Note Dielectrics 2Google Scholar
  6. 6.
    Perrier G, Bergeret A (1997) J Polym Sci Part B Polym Phys 35(9):1349CrossRefGoogle Scholar
  7. 7.
    Howell FS, Bose RA, Macedo PB, Moynihan CT (1974) J Phys Chem 78(6):639CrossRefGoogle Scholar
  8. 8.
    McCrum NG, Read BE, Williams G (1967) Anelastic and dielectric effects in polymeric solids. Wiley, New YorkGoogle Scholar
  9. 9.
    McLachlan DS, Hwang JH, Mason T (2000) J Electroceram 5(1):37CrossRefGoogle Scholar
  10. 10.
    McLachlan DS (2000) J Electroceram 5(2):93CrossRefGoogle Scholar
  11. 11.
    Hwang JH, McLachlan DS, Mason T (1999) J Electroceram 3(1):7CrossRefGoogle Scholar
  12. 12.
    Wu J, McLachlan DS (1997) Phys Rev B56(3):1236CrossRefGoogle Scholar
  13. 13.
    Xia J, Pan Y, Shen L, Yi XS (2000) J Mater Sci 35:6145CrossRefGoogle Scholar
  14. 14.
    Youngs IJ (2000) IEE Proc Sci Meas Tech 147(4):202CrossRefGoogle Scholar
  15. 15.
    Youngs IJ (2001) Electrical percolation and the design of functional electromagnetic materials. Ph.D. thesis, Electronic and Electrical Engineering, University College, LondonGoogle Scholar
  16. 16.
    McLachlan DS, Chiteme C, Park C, Wise KE, Ounaies Z, Lowther SE, Lillehei P, Siochi EJ, Harrison JS (2005) J Polym Sci Part B Polym Phys 43:3273CrossRefGoogle Scholar
  17. 17.
    Kusy RP (1977) J Appl Phys 48(12):5301CrossRefGoogle Scholar
  18. 18.
    Chiteme C, McLachlan DS, Sauti G (2007) Phys Rev B 75:094202CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media, LLC 2007

Authors and Affiliations

  1. 1.School of Physics and Materials Physics Research InstituteUniversity of the WitwatersrandWitsSouth Africa
  2. 2.Department of Chemistry and Polymer ScienceStellenbosch UniversityMatielandSouth Africa

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