Swiss Aluminium Ltd.

Sandor Molnar

Wolfhart Rieger

In a fused salt electrolytic cell used in the production of aluminum, a cathode having work faces which are wet by aluminum, are resistant to attack by the molten electrolyte and are electrically conductive, is made up of a bed of loose shaped pieces or bodies located in the molten electrolyte. The pieces or bodies are made of a plurality of composite material elements bonded together which sink in molten aluminum, the composite material elements comprise a fine granular or chip-shaped substrate material selected from the group consisting of carbon, graphite, anthracite, aluminum nitride, silicon carbide and mixtures thereof having a thin layer coating of a material selected from the group consisting of titanium diboride, titanium carbide, titanium nitride, zirconium diboride, zirconium carbide, zirconium nitride and mixtures thereof completely and densely covering the surface of the substrate wherein the spaces between the coated substrate composite materials when bonded together to form the bodies are at least partly filled with the coating substance.

Cathode for a fused salt reduction cell

A polishing foil or plate is made up of a metallic base provided with a non-metallic layer which covers the polishing surface, acts as a polishing substrate and is intimately bonded to the metallic base. Used together with polishing substances, the polishing foil or plate prepares material such as metals, minerals and ceramics for microscopic examination and does so employing the minimum of polishing substance and with the minimum of rounding at the edge of the samples.

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Neuhausen, Switzerland

Sandor Molnar