ISSN 0862-5468 (Print), ISSN 1804-5847 (online) 

Ceramics-Silikáty 64, (4) 379 - 386 (2020)

Faturíková Katarína 1, Gavenda Tadeáš 2, Liška Marek 3,4, Viščor Petr 1 ,5
1 FunGlass, A. Dubček University of Trenčín, Študentská 2, 911 50 Trenčín, Slovakia
2 University of Chemistry and Technology, Prague, Faculty of Chemical Technology, Technická 5, Prague, 166 28, Czech Republic
3 VILA - Joined Glass Centre of the IIC SAS, TnUAD, FChPT STU, Študentská 2, Trenčín, 911 50, Slovakia
4 Institute of Inorganic Chemistry of Slovak Academy of Sciences, Dúbravská cesta 9, Bratislava, 845 36, Slovakia
5 EIS Laboratory, Skjoldenaesvej 17, 4174 Jystrup, Denmark

Keywords: Impedance spectroscopy, Dielectric relaxation, Electrical conductivity

The temperature dependence of impedance spectra of industrially produced (RONA, Lednické Rovne, Slovakia) barium crystal glass was studied. The linear dependence of complex impedance on the sample thickness was used for separating the bulk dielectric properties from the electrode boundary effects. The temperature dependence of direct current conductivity was evaluated from the Nyquist plots. The ZARC circular line was adjusted to the Nyquist plots by the least squares method. The distribution of relaxation times in impedance was evaluated this way. More detailed analysis of impedance spectra was performed by the equivalent circuit method in capacitance. Four relaxation processes were identified this way.

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doi: 10.13168/cs.2020.0025
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