Linear and nonlinear impedance in iron oxide glasses containing alkaline ions and alkali free - Publication - Bridge of Knowledge

Search

Linear and nonlinear impedance in iron oxide glasses containing alkaline ions and alkali free

Abstract

The linear and nonlinear impedance spectra of oxide glasses were measured in the frequency range of 1 mHz to 1 MHz and in the temperature range of 153K to 483K. Two groups of iron oxide glass samples were prepared, the first one containing alkaline ions and the second one without alkali. In the first group, compositions of glasses were as follows: (in %mol) 50% SiO2 , 25% PbO, 15% Fe2O3 and 15% one of alkaline oxides: Na2O, K2O, Li2O. These transition metal oxide glasses containing alkali should show mixed polaronic-ionic conductivity. However, two relaxation processes were observed only in glass doped with K2O. All samples of this group show no detectable nonlinearities in impedance spectra. In the second group, the content of iron ions are respectively 15%, 20% and 25%. These glasses are polaronic conductors and only one relaxation process was observed in them. In parallel, the contents of the third harmonics at certain samples achieves values ranging from 3% to 5% at temperature below 273K and low frequency region (1mHz).

Cite as

Full text

full text is not available in portal

Keywords

Details

Category:
Monographic publication
Type:
rozdział, artykuł w książce - dziele zbiorowym /podręczniku w języku o zasięgu międzynarodowym
Title of issue:
Advances in Chemical and Mechanical Engineering. - Vol. II/II strony 243 - 247
Language:
English
Publication year:
2012
Bibliographic description:
Wójcik N.: Linear and nonlinear impedance in iron oxide glasses containing alkaline ions and alkali free// Advances in Chemical and Mechanical Engineering. - Vol. II/II/ ed. eds. C. Fijało, P. Fijało. Gdańsk: GUT, 2012, s.243-247
Verified by:
Gdańsk University of Technology

seen 122 times

Recommended for you

Meta Tags