Abstract
Electrical conductivity and activation energy of some sodium-silicate glasses containing different substituted cations (Ca or Al) at different temperatures, were studied with the view to throw some light on the mechanism of electrical conduction in relation to glass structure. The DC electrical conductivity for samples containing soda alone was higher than samples containing substituted CaO or alumina. The conduction mechanism is attributed to the ability of charge carrier cations (alkali or alkaline earth cations) to move freely or become more mobile. The electrical conductivity of the studied glasses is correlated with the change in chemical composition which affects the change in chemical composition and the internal structure and hence the ability or the freedom of charge carriers to conduct electricity. Moreover, the increase in the activation energy was attributed to the presence of anions with large radii which in turn decrease the electrical conductivity.
Published Version
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