Rotating Disk Studies in Molten Carbonates: I . Electrode Design

Abstract

A rotating disk electrode has been designed, fabricated, and tested for use in high temperature molten salt systems to determine mass‐transport parameters that have been difficult to obtain hitherto due to experimental difficulties. The design incorporates a centrifugally cast and machined solid gold cone soldered to an Inconel shaft, which fits snugly in a precision‐machined high purity alumina sheath. A thermal expansion seal obtained when the electrode is heated to the experimental temperature prevents seepage of electrolyte between the gold and insulator. Preliminary tests have shown good performance.