Dielectric study of X type zeolites: evidence for cation correlated motions

Tabourier, P.; Carru, Jean-Claude; Wacrenier, J.M.

doi:10.1051/jcp/1990870043

Cited by 18 publications

(19 citation statements)

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“…On the other hand, the cationic composition in intrazeolitic space plays an important role, too. The existence of correlated movement of the intrazeolitic cations was stressed in Ref . Cations create “small” microscopic objects called clusters, which are considered as units of relaxation.…”

Section: Resultsmentioning

confidence: 99%

Electrical Properties of Microdischarge in Porous Zeolites

Koseoglu

Özer

Salamov

2014

Plasma Processes & Polymers

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The gas breakdown processes in dc microdischarges with a zeolite cathode (ZC) have been investigated. The electric field has a pronounce effect on the electrical characteristics of the ZC. The effects of electric field and secondary emission were discussed in atmospheric plasmas (AP). A nanoporous surface used as microreactor could enhance the electron emission from the cathode surface, thus reducing the breakdown voltage (UB). Results indicate that the UB decreases with increasing ZC diameter and decreasing with gap distance. Microdischarges in spatially confined geometries, such as the nanoporous structure of ZCs, present a promising method for the generation and maintenance of stable AP.

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Section: Resultsmentioning

confidence: 99%

Electrical Properties of Microdischarge in Porous Zeolites

Koseoglu

Özer

Salamov

2014

Plasma Processes & Polymers

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“…6a) and TSDC (Fig. 6b) spectra of dehydrated Na-13X recorded by TABOURIER et al (1990), and at various hydration levels given by PISSIS and DAOUKAKI-DIAMANTI. Two of the relaxations ascribed to ionic transport, namely, domains I1 and I (in Fig.…”

Section: Relaxations and Other Polarisation Phenomena In Zeolites (A)mentioning

confidence: 91%

“…In their early investigations WACRE-NIER et al broke down the Cole-Cole plots of domain 11, into discrete single Debye-type dispersions, each associated with cations on different sites. Much later, in agreement with the "clusters" model, the broad spectral losses were numerically analysed into three discrete components assigned to different sets of clusters (TABOURIER et al 1990). As the dielectric strength (A&) of an elementary Debye-type dispersion is proportional to the number of the relaxing units (in that case the number of the clusters involved) the strength of each elementary dispersion gives a representative picture of the cation distribution.…”

Section: Relaxations and Other Polarisation Phenomena In Zeolites (A)mentioning

confidence: 97%

“…To eliminate conduction effects, which are remarkably intensified at the spectra of univalent cation-exchanged zeolites, it is necessary to implement blocking electrode configurations [e.g. teflon and FEP films (TABOURIER et al 1990;, thin mica sheets (SCHOONHEYDT, UYTTERHOEVEN 1969), etc.]. The activation energy for conduction (E) represents steric and coulombic potential energy barriers a particular ion has to overcome for diffusion in the lattice, throughout a sequence of successful jumps on vacant sites.…”

Section: Conduction In Zeolitesmentioning

confidence: 99%

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Molecular Mobility in Microporous Architectures: Conductivity and Dielectric Relaxation Phenomena in Natural and Synthetic Zeolites

Kalogeras

Vassilikou‐Dova

1996

Cryst. Res. Technol.

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“…These solids can adsorb water without structural modification. The water molecules and the exchangeable cations can freely move in the zeolite [1,2].…”

Section: Introductionmentioning

confidence: 99%

Study of hydrated Na-faujasite zeolites by thermally stimulated currents technique

Chabanis

Abdoulaye

Giuntini

et al. 1997

Ionics

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Abstract. The dielectric relaxation of the two faujasite zeolites NaX and NaY as a function of their hydration state, has been studied. The technique of thermally stimulated current (TSC) has been used. Two distinct processes of cationic relaxation have been identified. They correspond to local hops of cations of sites III' and II of the supercage. Analysis of the observed TSC peaks has been performed by the thermal windowing method (TSC/RMA). The activation energies of the two relaxations have been determined as a function of the adsorbed water molecules. The influence of the water molecules on the movement of the cations in the considered sites was explained.

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Dielectric study of X type zeolites: evidence for cation correlated motions

Cited by 18 publications

References 0 publications

Electrical Properties of Microdischarge in Porous Zeolites

Electrical Properties of Microdischarge in Porous Zeolites

Molecular Mobility in Microporous Architectures: Conductivity and Dielectric Relaxation Phenomena in Natural and Synthetic Zeolites

Study of hydrated Na-faujasite zeolites by thermally stimulated currents technique

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