Abstract
A series of glass samples has been prepared from mixtures of Na2B4O7, and Fe2O3. Measurements have been made of the d.c. conductivity as a function of temperature and composition. These results have been interpreted in terms of the activation energy, which increased with a small addition of Fe2O3 (0.5 mol.%) in Na2B4O7 glasses but decreased again with further addition of Fe2O3. D.c. conductivity measurements have revealed a mixed conduction phenomenon in which ionic as well as electronic conduction occur in the glass. Differential scanning calorimetry (DSC) as a function of Fe2O3 content is also measured.
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