Foils and strips made of molybdenum

MO foils

Foils and strips made of molybdenum

Foils and strips made of molybdenum

We produce wire-laminated foils for sealing in quartz glass. These have a lanceolated cross-section profile and a roughened surface, so that optimum adhesion can be achieved between quartz glass and metal. Molybdenum is used in their production – a material with a very high melting point, low vapour pressure and extreme heat resistance. It also has a low specific heat and thermal expansion as well as good conductivity.

A molybdenum material doped with yttrium is produced for special uses; this produces better weldability and an outstanding adhesive strength of the foil in quartz glass seals. The recrystallisation temperature is increased to around 1400° C compared to pure molybdenum. Further, molybdenum doped with potassium silicate is also offered, whose recrystallisation temperature reaches around 1700° C. Modern production technology and the use of laser and computer technology in quality management, coupled with decades of experience and first-class know-how, enable our company to guarantee a uniformly high product quality.

We produce wire-laminated molybdenum strip with a bright surface for different applications, e.g. the production of molybdenum tubes as a welding aid for welding filaments or electrodes as components of lamps. As NARVA G.L.E. uses the foils it produces in its own lamp production, our customers can be sure that all knowledge acquired from the processing of this product is continuously incorporated in the constant quality control and further development of our molybdenum foils.

Advantages of NARVA foils
  • Extreme temperature resistance
  • Closed surface
  • Stable edges and continuous strip
  • High squeeze pressure
  • Rough surface
  • Cost-effective production
Application examples
For sealing purposes in quartz glass



For sealing purposes in quartz glass
Electrodes as components of lamps

 




Electrodes as components of lamps

Production of molybdenum tubes as a welding aid for welding filaments



Production of molybdenum tubes as a welding aid for welding filaments
Technical details of molybdenum


 


Foils made of pure molybdenum


Foils made of pure molybdenum

Yttrium oxide

 

0,5 - 0,7 %

Molybdän / Molybdenum

 

 

Cr

< 20 ppm

< 20 ppm

Cu

< 20 ppm

< 20 ppm

Fe

< 100 ppm

< 100 ppm

Ni

< 20 ppm

< 20 ppm

Si

< 20 ppm

< 20 ppm

K

< 20 ppm

< 20 ppm

W

< 200 ppm

< 200ppm

C

< 30 ppm

< 30 ppm