Title :
Dielectric studies in zeolite-water systems
Author :
Daoukaki-Diamanti, D. ; Pissis, P.
Author_Institution :
Dept. of Phys., Nat. Tech. Univ. of Athens, Greece
Abstract :
The authors use zeolites as model systems in an attempt to study the dynamic properties of water in small volumes under different geometrical confinements. They report on detailed studies of the dielectric properties of compressed Na-X zeolite powders by means of the thermally stimulated depolarization currents (TSDC) method in the temperature range 77-300 K and with water contents up to about 0.6 w/w. For comparison, other absorbates are also studied. The relaxation mechanisms observed are discussed in terms of different structures of water molecules, ion-jumping within the lattice, DC conductivity, and critical water contents
Keywords :
dielectric depolarisation; dielectric relaxation; electrets; sodium compounds; thermally stimulated currents; water; 77 to 300 K; DC conductivity; compressed Na-X zeolite powders; dielectric properties; dynamic properties; electret; geometrical confinements; ion-jumping; model systems; relaxation mechanisms; small volumes; thermally stimulated depolarization currents; water contents; zeolite-water systems; Biological system modeling; Conducting materials; Conductivity; Dielectrics; Lattices; Physics; Powders; Solid modeling; Temperature distribution; Water;
Conference_Titel :
Electrets, 1991. (ISE 7) Proceedings., 7th International Symposium on (Cat. No.91CH3029-6)
Conference_Location :
Berlin
Print_ISBN :
0-7803-0112-9
DOI :
10.1109/ISE.1991.167210
