Our Complete range of products are Etched Molybdenum Foil, Platinum Clad Molybdenum and Tantalum.
Etched molybdenum foil, of all metals, is used since its coefficient of expansion is the closest to quartz. The elliptical shape produces an air and gas tight lead into the lamp envelope, thus preventing filament degradation during lamp operation.
. Cross Company supplies 15% platinum clad by weight, molybdenum in both wire and flat ribbon. It is used as the welding interface between the etched molybdenum, the lamp electrode and lead wire. The platinum clad molybdenum is manufactured under the same stringent controls as the etched molybdenum and is more economical as a welding flux than the pure platinum used for years.
Tantalum can be used as the welding interface between the etched molybdenum, the lamp electrode and lead wire. The tantalum is manufactured under the same stringent controls as the etched molybdenum and is the most economical of the welding fluxes. H. Cross Company can supply tantalum products in wire, rod, ribbon, strip, sheet and foil forms at 99.95% purity and in wire, strip and ribbon at 99.995% purity for specialized applications such as filament materials. If you have specific requirements, please Contact Us or by phone for further information or assistance.