✍ Scribed by M.W. Breiter; B. Dunn
No coin nor oath required. For personal study only.
A small ac signal was used to resolve the two components of the ac impedance of the sodium/beta" alumina interface as a function of cell voltage. 30th components were observed to change rapidly in the transition region between the high resistance and low resistance states. The occurrence of an electrochemical reaction within this potential range cannot be observed by impedance measurements. The two components reflect the properties of a thin interfacial film which is believed to be responsible for the asymmetric resistance.
📜 SIMILAR VOLUMES
## Akutract -The time depcndena of the asymmetric dc resistance for certain polycrystalline /I"-alumina tubes was investigated by cyclic voltammetry and current pulse techniques. Various compositions were studied as representative of the different types of behavior; asymmetric rcaistanoe with time
The anodic degradation of beta/beta" alumina of different compositions was investigated by voltammetric techniques in cells of the type Cu/Rodar alloy/carbon fibers/graphite layer/solid electrolyte/NaNOI/Pt/Cu at 350°C. The possibility was evaluated if the voltammetric results are useful as a diagno
The preparation of copper beta alumina from sodium beta alumina is described. The lattice parameters, phase contents, densities and expansion coefficients were determined. The electrolytic substitution of Cu+ in the beta-alumina structure was not complete as a small proportion of Na+ remained within