Radio frequency dielectric properties of limestone and sandstone from Ewekoro, Eastern Dahomey Basin.
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Date
2013
Authors
Olatinsu, O.B
Olorode, D.O D. O
Oyedele, K.F
Journal Title
Journal ISSN
Volume Title
Publisher
Advances in Applied Science Research
Abstract
The dielectric properties of nine rock samples [limestone (8) and sandstone (4)] collected from Ewekoro in Ogun
State, Nigeria were studied in the range 10 kHz – 110 MHz under ambient atmospheric conditions. It is found that
dielectric constant (ε′) values of the dry samples decreases with increase in frequency in the range of
measurement. Dielectric dispersion is relatively large in almost all the samples. Conductivity dispersions followed
the opposite trend increasing in values with increase in frequency. Peaks are more pronounced in loss tangent (D)
curve than in dielectric loss (ε′′ ) curve. This is an indication that overall electrical response of these samples is
better revealed by loss tangent variation than dielectric loss variation. All the studied samples are governed by
Cole-Cole dispersion which indicates a distribution of relaxation times which is common for multicomponent
systems. This is confirmed by the value of the spread parameter which is below 0.5 for all the samples.
Description
Keywords
Dielectric , dispersion , relaxation frequency , limestone , sandstone
Citation
Olatinsu, O. B., Olorode, D. O., & Oyedele, K. F. (2013). Radio frequency dielectric properties of limestone and sandstone from Ewekoro, Eastern Dahomey Basin. Adv. Appl. Sci. Res, 4(6), 150-158.