Abstract
The dielectric properties of the NaX zeolite (Si/Al=1.3) have been measured after different thermal treatments in the temperature range 100–400°C. The frequency domain was varied from 10 to 106 Hz, the measuring temperature being in the range 80–150°C. Independent of the outgassing temperature (i.e. the number of water molecules), the ac conductivity is ascribed to migration of the supercage cations. The variation in the migration energy (Edc) as a function of the adsorbed water molecules (0.9–0.58 eV) shows their influence on the conduction process. Two relaxation domains are observed: ‘low-frequency’ and ‘high frequency’ relaxations, which are due to local hops of cations located in sites II and III, respectively. These two relaxations are confirmed by thermally stimulated current measurements. The energies associated with these relaxations vary with the outgassing temperature.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Journal of the Chemical Society, Faraday Transactions
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
