Discrimination between dipolar and space-charge relaxation by thermally stimulated current spectroscopy: application to several alkali-exchanged mordenites

Autor:	J. C. Giuntini, J. V. Zanchetta, F. Henn, J. Vanderschueren, S. Devautour
Rok vydání:	1999
Předmět:	Acoustics and Ultrasonics Chemistry Relaxation (NMR) Thermally stimulated current spectroscopy Analytical chemistry Dielectric Condensed Matter Physics Alkali metal Space charge Spectral line Surfaces Coatings and Films Electronic Optical and Magnetic Materials Dipole Chemical physics Spectroscopy
Zdroj:	Journal of Physics D: Applied Physics. 32:147-156
ISSN:	1361-6463 0022-3727
DOI:	10.1088/0022-3727/32/2/012
Popis:	Thermally stimulated current (TSC) spectroscopy is widely used to understand dielectric relaxation in complex solid systems. However, when these systems contain free and bound charges, it appears that TSC spectra exhibit multicomponent signals, due both to dipolar and to space-charge relaxation. In this work, we propose an experimental method to identify clearly and then separate the space-charge contribution from the dipolar current, in ionically conducting solids. This method is based on the comparison between global and fractional thermally stimulated current procedures and is applied to analyse the dielectric response of several alkali-exchanged mordenites (with exchange of , and for ).
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::edd1382c7789b945970b6e02ef832f9b https://doi.org/10.1088/0022-3727/32/2/012 Zobrazit plný text záznamu