Ceradyne supplies titanium diboride ceramic components for experimental use in the Hall-Heroult aluminum smelting process. Titanium diboride is used as an inert cathode where the electrochemical reduction of aluminum oxide occurs, yielding aluminum and oxygen. Titanium diboride was selected because of its electrical conductivity and chemical inertness.

Ceradyne supplies silicon nitride thermal couple protection tubes and fused silica riser tubes for use in molten aluminum casting machines. These materials are resistant to attach by molten aluminum.