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A theoretical model for describing the time evolution of concentration profiles in thermal electro-poling experiments is being presented. The model is based on a Monte Carlo formalism. It takes into account the field dependent mobility of cations as well as electrons. Model calculations are presented for a 46S4 bio-glass. Upon application of a DC field Na+ ions start to move toward the cathode giving...
The transport of potassium and rubidium ions through glasses containing the respective alkali ion as mobile species has been investigated by means of bombardment induced ion transport (BIIT) and impedance spectroscopy (IS). The conductivities as well as the activation energies derived from the two approaches are in agreement lending further support to the recently developed BIIT approach.
The transport of alkali ions through solid electrolytes is a key process in the field of energy storage and energy conversion [1,2]. Typically the transport is characterized via the diffusion coefficient or the conductivity. Conventional approaches to ion conductivity include e.g. impedance spectroscopy (IS), pulsed field gradient NMR and tracer diffusion techniques [3]. These techniques typically...
The transport of potassium ions through potassium borosilicate glass has been investigated experimentally by measuring the back side current induced by ion bombardment of the front side. The experimental data are compared to calculations employing the Nernst-Planck-Poisson model. The analysis allows deriving the bulk ion conductivity respectively diffusion coefficient of the material. The role of...
The D 2 loss from C 2 D +6 ions and the HD loss from C 2 D 5 H + ions has been investigated in a photoelectron photoion coincidence experiment employing a reflecting ion time of a flight mass spectrometer (Reflectron). The experiment is able to distinguish the metastable formation of C 2 D +4 ions (m/z = 32) from C 2 ...
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