Electrode configurations and impedance spectra of cement pastes

S. J. Ford, Thomas O Mason, B. J. Christensen, R. T. Coverdale, H. M. Jennings, E. J. Garboczi

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

Electrode effects on impedance spectra of cement pastes were investigated by two-, three-, and four-point measurements without a potentiostat over the frequency range 0.01 Hz-10 MHz. Electrode immittance effects arising from highly resistive/capacitive contacts cannot be fully corrected by nulling procedures. Two-point measurements are much more susceptible to such effects than three- or four-point measurements. The three- and four-point results on pastes suggest that there is negligible high-frequency "offset" resistance, and that bulk paste arcs are not significantly depressed below the real axis in Nyquist plots. The important impedance-derived equivalent circuit parameters are bulk resistance and capacitance; offset resistance and arc depression angle may not be physically meaningful parameters. Whereas all electrode configurations give reliable values of bulk paste resistance, only the three-point configuration provides the total paste/electrode dual arc spectrum involving a single electrode. Multielectrode (three- or four-point) measurements may be necessary to establish the true bulk paste dielectric constant.

Original languageEnglish
Pages (from-to)1217-1224
Number of pages8
JournalJournal of Materials Science
Volume30
Issue number5
DOIs
Publication statusPublished - Jan 1995

Fingerprint

cements
Ointments
Cements
impedance
Electrodes
electrodes
configurations
arcs
Equivalent circuits
electrical impedance
equivalent circuits
Permittivity
Capacitance
plots
frequency ranges
capacitance
permittivity

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials
  • Materials Science(all)

Cite this

Ford, S. J., Mason, T. O., Christensen, B. J., Coverdale, R. T., Jennings, H. M., & Garboczi, E. J. (1995). Electrode configurations and impedance spectra of cement pastes. Journal of Materials Science, 30(5), 1217-1224. https://doi.org/10.1007/BF00356122

Electrode configurations and impedance spectra of cement pastes. / Ford, S. J.; Mason, Thomas O; Christensen, B. J.; Coverdale, R. T.; Jennings, H. M.; Garboczi, E. J.

In: Journal of Materials Science, Vol. 30, No. 5, 01.1995, p. 1217-1224.

Research output: Contribution to journalArticle

Ford, SJ, Mason, TO, Christensen, BJ, Coverdale, RT, Jennings, HM & Garboczi, EJ 1995, 'Electrode configurations and impedance spectra of cement pastes', Journal of Materials Science, vol. 30, no. 5, pp. 1217-1224. https://doi.org/10.1007/BF00356122
Ford SJ, Mason TO, Christensen BJ, Coverdale RT, Jennings HM, Garboczi EJ. Electrode configurations and impedance spectra of cement pastes. Journal of Materials Science. 1995 Jan;30(5):1217-1224. https://doi.org/10.1007/BF00356122
Ford, S. J. ; Mason, Thomas O ; Christensen, B. J. ; Coverdale, R. T. ; Jennings, H. M. ; Garboczi, E. J. / Electrode configurations and impedance spectra of cement pastes. In: Journal of Materials Science. 1995 ; Vol. 30, No. 5. pp. 1217-1224.
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