Abstract
Abstract The electrical conductivity of copper phosphate glasses depends on the relative concentrations of Cu+ and Cu2+ ions and it is found that by adding cupric chlorine to the melt when the glass is formed the added chlorine which acts as an oxidizing agent alters the ratio of the concentration of Cu+ and Cu2+ and thus the conductivity. The change in the concentration of Cu2+ ions in the glasses is determined by infrared spectroscopic measurements and by studies of electron spin resonance, and the change in the Cu+ ion concentration is inferred since the total copper content in the glasses is held constant. It is suggested that the principle of adding a component in the form of a strong oxidizing agent to the glass to alter the reduced valency ion ratio may be of general application in the control of electrical conductivity in transition metal ion glasses.
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