Abstract
The behaviour of the sodium Pyrex glass electrode in molten zinc chloride has been investigated at temperatures between 340 and 500°C. This electrode is shown to be reponsive to sodium ions and its electrode potential conforms to the Nernst equation. Micropolarization tests demonstrate its reversibility and the value of the activation energy for the conduction process, 21 Kcal/mol, is common to that for small-ion conduction in glasses. The Nernst plots, micropolarization tests and the value for the activation energy all indicate that conduction through the glas is via sodium ions. This is confirmed by the quantitative electrodepostion of sodium from the glass into indium.
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