Abstract
In order to understand the relation between the conductivity and the dielectric properties of porous materials and their pore fluid content, we report and discuss dielectric constant measurements of brine-saturated porous alumina ceramics which exhibit a gigantic increase of the low frequency dielectric constantwhile the sample remains conducting. Generalizing a model derived to study the properties of porous sedimentary rocks, where such an effect has been known for more than two decades, we discuss the effect of the pore geometry on the frequency, salinity and porosity variation of the ceramic dielectric constant and conductivity. This can provide a partial explanation of the reported measurements. Such a study provides a new and interesting method to investigate the microgeometry of composite materials and in particular the pore geometry of ceramics.
Article PDF
Similar content being viewed by others
Explore related subjects
Discover the latest articles, news and stories from top researchers in related subjects.Avoid common mistakes on your manuscript.
References
J. H. Scott, R. D. Caroll andD. R. Cunningham,J. Geophys. Res. 72 (1967) 5101.
P. N. Sen,Geophysics 46 (1981) 1714.
A. K. Jonscher,Nature 267 (1977) 673.
P. N. Sen,Appl. Phys. Lett. 39 (1981) 667.
J. C. M. Garnett,Phil. Trans. R. Soc. 203 (1904) 385.
Idem, ibid. 205 (1906) 237.
G. A. Niklasson andC. G. Granquist,J. Appl. Phys. 55 (1984) 3382.
G. E. Archie,AIME Trans 146 (1942) 54.
F. Brouers andA. Ramsamugh,Solid State Commun. 60 (1986) 951.
Bruggeman,Ann. Phys. (Liepzig) 24 (1935) 636.
F. Brouers,J. Phys. C. Solid State Phys. 19 (1986) 7183.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Brouers, F., Ramsamugh, A. & Dixit, V.V. A dielectric anomaly in electrolyte-saturated porous alumina ceramics. J Mater Sci 22, 2759–2766 (1987). https://doi.org/10.1007/BF01086468
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/BF01086468