Large low frequency dielectric constant exhibited by hydrated rock materials

Authors
Kyritsis, A Siakantari, M Vassilikou-Dova, A Pissis, P Varotsos, P
Citation
A. Kyritsis et al., Large low frequency dielectric constant exhibited by hydrated rock materials, P JPN AC B, 77(2), 2001, pp. 19-23
Citations number
15
Categorie Soggetti
Multidisciplinary
Journal title
PROCEEDINGS OF THE JAPAN ACADEMY SERIES B-PHYSICAL AND BIOLOGICAL SCIENCES
ISSN journal
03862208 → ACNP
Volume
77
Issue
2
Year of publication
2001
Pages
19 - 23
Database
ISI
SICI code
0386-2208(200102)77:2<19:LLFDCE>2.0.ZU;2-A
Abstract
The dielectric properties of low porosity polycrystalline marble and granit e rocks were investigated using broadband dielectric relaxation spectroscop y (10(-2)-10(6) Hz) at fixed room temperature (295 K). 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 wate r content. A thorough study of this dispersion reveals that the main part o f the enhanced epsilon* values originates from bulk effects.