ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Dielectrical Behaviour and Conductivity of Natural Copper Exchanged Clinoptilolite

V. Šály, M. Reháková, A. Sopková, and M. Ďurkovič

Department of Electrotechnology, Electrotechnical Faculty, Slovak Technical University, SK-812 19 Bratislava

Abstract: The aim of this study was to characterize electrical conductivity and dielectrical properties of the Cu(II) exchanged zeolite - natural clinoptilolite from Eastern Slovakia in the range of frequencies from 10¹ to 10⁵ Hz and at temperatures from 218 to 603 K. The measured values of the conductivity sigma ranged from 10^-10 to 10^-5 S m^-1 at these frequencies and those temperatures. Dielectrical loss peak was found only at temperatures lower than 273 K. Activation energy calculated using static values σ_s extrapolated from Cole-Cole impedance diagrams was found to be E_a = 0.78 eV. The results of Electron Microsonda measurements, CHN analyses, and thermal analyses are given, too.

Full paper in Portable Document Format: 484a236.pdf

Chemical Papers 48 (4) 236–241 (1994)