Effects of proton injection on the electrical properties of ice

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Abstract
Measurements have been made of the electrical properties of thin monocrystalline samples of ice with hydrogen-loaded palladium electrodes which permit the exchange of protons between the electrodes and the ice. At potential differences greater than 400 V, space-charge-limited currents are produced, and simultaneous measurements of the a.c. dispersion curves show changes due to the space charge. Experiments with blocking electrodes, and with one injecting and one blocking electrode are also described. A theory of the space-charge-limited properties is developed within the framework of the Jaocard theory of the electrical properties of ice. This yields mobilities of H2O+ ions at −20°C of ∼ 10−9−l0−7 m2 V−1 s−1, but these values will be lower limits due to trapping.