Proceedings of the Japan Academy, Series B
Online ISSN : 1349-2896
Print ISSN : 0386-2208
ISSN-L : 0386-2208
Large low frequency dielectric constant exhibited by hydrated rock materials
Apostolos KYRITSISMaria SIAKANTARIAglaia VASSILIKOU-DOVAPolikarpos PISSISPanayoitis VAROTSOS
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2001 Volume 77 Issue 2 Pages 19-23

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Abstract

The dielectric properties of low porosity polycrystalline marble and granite rocks were investigated using broadband dielectric relaxation spectroscopy (10-2-106Hz) at fixed room temperature (295K). The water content of the specimens was varied between 0 and 0.22% (mass of absorbed water per mass of dry rock material %). The dielectric relaxation spectra were found to exhibit large low-frequency dispersion that depends strongly on the water content. A thorough study of this dispersion reveals that the main part of the enhanced ε* values originates from bulk effects.

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