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Analysis of AC Permittivity Response Measured in an Ionic Glass: a Comparison between Iso and Non-iso Thermal Conditions

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Analysis of AC Permittivity Response Measured in an Ionic Glass: a Comparison between Iso and Non-iso Thermal Conditions
Giuntini, Jean-Charles
Bisquert, Juan
Henn, Francois
Καμίτσος, Ευστράτιος Ι.
Devautour-Vinot, Sabine
Βαρσάμης, Χρήστος-Πλάτων Ε.
Garcia-Belmonte, Germa
Άρθρο σε επιστημονικό περιοδικό
2010-08
Piscataway
AC permittivity is measured on a sodium aluminosilicate glass as a function of frequency and temperature using various experimental conditions. The spectra obtained under isothermal and non-isothermal experiments, with insulating barriers placed on both sides of the sample, are compared. An RC equivalent circuit is proposed to account for the experimental behavior and data are analyzed in terms of activation energy distribution. Then, it is pointed out that the dielectric loss signal measured under ramping temperature and fixed frequency conditions lacks of information in the low temperature range. Therefore, the distribution function obtained in that way must be refined in order to account for the high frequency part of the ac permittivity responses measured at fixed temperature and variable frequency. An additional exponential decay contribution to the distribution function appears thus necessary, though its statistical weight is extremely low. This contribution is akin to the so-called CPA (constant phase angle) or NCL (nearly constant loss) behavior.
Φυσική (EL)
Μηχανική (Γενικά). Πολιτική μηχανική (Γενικά) (EL)
Engineering (General). Civil engineering (General) (EN)
Physics (EN)
equivalent RC circuit
ionic glasses
distribution of activation energy
Engineering, Electrical & Electronic
Ac conductivity
Physics, Applied
English
IEEE-inst Electrical Electronics Engineers Incorporated
Ieee Transactions on Dielectrics and Electrical Insulation
© IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
© IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC (EN)
National Hellenic Research Foundation (NHRF)
Helios - Repository of the National Hellenic Research Foundation (NHRF)



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