Impedance spectra of mixed conductive silver vanadate-phosphate glasses

Impedance spectra of mixed conductive silver vanadate-phosphate glasses

Electrical properties of glasses in the AgI–Ag 2O–V 2O 5–P 2O 5 system, which in general case exhibit mixed electronic–ionic conduction, were investigated. By thorough adjustment of the composition we have prepared glasses with comparable electronic and ionic contributions to the electrical conducti...

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Veröffentlicht in:Solid state ionics 2003-02, Vol.157 (1), p.281-285
Hauptverfasser: Machowski, P., Garbarczyk, J.E., Wasiucionek, M.
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AgI–Ag 2O–V 2O 5–P 2O 5 glasses
Impedance spectroscopy
Mixed conduction
Warburg impedance
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Garbarczyk, J.E.
Wasiucionek, M.
description Electrical properties of glasses in the AgI–Ag 2O–V 2O 5–P 2O 5 system, which in general case exhibit mixed electronic–ionic conduction, were investigated. By thorough adjustment of the composition we have prepared glasses with comparable electronic and ionic contributions to the electrical conductivity. The measured impedance spectra of these glasses indicate the important role of diffusion processes in charge transport. The spectra were analyzed numerically using an electrical equivalent circuit consisting of parallel electronic and ionic branches. The substantial role in the equivalent circuit is played by Warburg elements representing finite-length and semi-infinite diffusion phenomena occurring close to the electrodes.
doi_str_mv 10.1016/S0167-2738(02)00222-9
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subjects AgI–Ag 2O–V 2O 5–P 2O 5 glasses
Impedance spectroscopy
Mixed conduction
Warburg impedance
title Impedance spectra of mixed conductive silver vanadate-phosphate glasses
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