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9 - Dielectric Properties

Published online by Cambridge University Press:  19 November 2021

Nikolai Bagdassarov
Affiliation:
Goethe-Universität Frankfurt Am Main
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Summary

Displacement current and bounded electrical charges are responsible for rock polarization. Dielectric constant: Debye, Cole–Cole or Havriliak–Negami models. Three types of bulk polarization: polarization due to dipoles, ionic polarization, and electronic polarization. Interface polarization on grain boundaries is explained by the Maxwell–Wagner effect. At grain boundaries in contact with electrolyte fluid, electrical double layer is described by the Gouy–Chapman–Stern model. Reaction mechanisms between SiO2 and H2O may take place. Increased electrolyte concentration results in increased surface energy. Electrical flux density and dielectric losses. Dielectric properties of rocks. Energy transport, transmission and reflection coefficients of minerals for electromagnetic waves in rocks. Induced polarization of rocks. Mixing models for dielectric constant: effective medium approach, Wiener and Hashin–Shtrikman bounds, Lorenz equation and percolation model. Factors causing induced polarization in rocks and the Pelton model. Focus Box 9.1: Maxwell’s equations. Focus Box 9.2: Lorenz field and Clausius–Mossotti equation. Focus Box 9.3: Redox reactions, Warburg impedance, Nyquist plots.

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  • Dielectric Properties
  • Nikolai Bagdassarov, Goethe-Universität Frankfurt Am Main
  • Book: Fundamentals of Rock Physics
  • Online publication: 19 November 2021
  • Chapter DOI: https://doi.org/10.1017/9781108380713.010
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  • Dielectric Properties
  • Nikolai Bagdassarov, Goethe-Universität Frankfurt Am Main
  • Book: Fundamentals of Rock Physics
  • Online publication: 19 November 2021
  • Chapter DOI: https://doi.org/10.1017/9781108380713.010
Available formats
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Save book to Google Drive

To save content items to your account, please confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your account. Find out more about saving content to Google Drive.

  • Dielectric Properties
  • Nikolai Bagdassarov, Goethe-Universität Frankfurt Am Main
  • Book: Fundamentals of Rock Physics
  • Online publication: 19 November 2021
  • Chapter DOI: https://doi.org/10.1017/9781108380713.010
Available formats
×