Hydration of a Na+-montmorillonite studied by thermally stimulated depolarization current

Influence of interlayer cations on organic intercalation of montmorillonite

“…Such discrimination can be made since the forces acting in the hydration process, which are due to ionicity and dispersive forces respectively, are significantly different. [38] The DTA curves show a similar trend in the range of 50-150°C (Fig. 3b).…”

“…The differences of interlayer water content for different Mt show the differences in the ability of combining water for different interlayer cations. The hydration state influences the potential barrier associated to the cation hopping process significantly [38]. In other words, amount of interlayer bonding water affect the diffusion of the interlayer cations and force of structure layer.…”

Dehydration enthalpy of alkali-cations-exchanged montmorillonite from thermogravimetric analysis

“…Its main drawback is, however, in the case of the samples studied here, that only the last stages of dehydration, i.e., those equivalent to the first hydration states, can be investigated. Meanwhile, it turned out to be rather efficient with respect to clays and zeolites, for which some physical properties, e.g., ionic conduction, are known to be very sensitive to the presence of the first adsorbed molecules [23]. This paper aims at investigating the dehydration of the whole alkali series of homoionic montmorillonites by measuring weight loss at a given treatment temperature (TT) and under a dry argon flow.…”

Dielectric losses measured in a sodium aluminosilicate glass by using electrical insulating barriers and non-isothermal experimental conditions

“…The spectrum thus obtained is noted e 00 xa;AEq ðTÞ where x a is the fixed frequency and q the linear heating (+) or cooling (À) rate. This proposal was merely inspired from the basic principle of Thermally Stimulated Current spectroscopy [19,20] which was proven to be successfully when applied to ionic conductors [21][22][23][24]. For instance, it was shown in the case of a zeolite that the space-charge polarization due to the blocking of ions at the insulator/sample interface could be clearly separated out as long as the experimental parameters x a and q were properly adjusted [18].…”