Differential surface tension of solid metal-molten alkali halide interfaces

✍ Scribed by Yu.G. Pastukhov

• Publisher: Elsevier Science
• Year: 1995
• Tongue: English
• Weight: 775 KB
• Volume: 40
• Category: Article
• ISSN: 0013-4686
• DOI: 10.1016/0013-4686(94)e0153-q

✦ Synopsis

The surface tensions (st) of Au, Ag and Cu electrodes in molten salts were measured as a function of the interfacial electrode potential (E) using the estance (differential surface tension) method. The influence of the salt nature, temperature (T) and frequency of mechanical oscillations on the st vs. E curves was investigated.

At temperatures near the salt melting point the st vs. E curves for the Au electrode exhibit a maximum in the region of the electrode polarizability.

The potential of the maximum is a function of the anion nature and T. Anomalous minima are observed in the regions of faradaic processes. The curves for the Ag-CsCI system have a maximum and two minima. Only one cathodic minimum is seen for the Cu-CsCl system at the same T. For Au and Ag electrodes elastic deformation has little effect on the total electrode charge near the maximum of the st vs. E curves.