Electron tubes still play a dominant role in the transmission of radio and television signals. However, new transmitting systems below 10 kW are increasingly equipped with semiconductor components. But for the retrofitting of existing systems and where high performance is essential, electron tubes still are the first choice. There is also an increasing demand for industrial use as high-frequency generators for furnaces and coating systems. High temperatures resulting from the operation of electron tubes call for the use of refractory metals such as molybdenum and tungsten.

PLANSEE USA supplies:

• Components and carrier systems for cathode tubes made of molybdenum and tungsten

Cathode Ray Tubes 

Traditional television images are generated by a cathode ray tube, transmitting electron beams to the screen. With the new 100 Hz-technology and high-definition television (HDTV), these parts are exposed to increased stress, making the use of refractory metals necessary.

PLANSEE USA supplies:

• Refractory metal components for cathode-ray tubes, such as cathode cups, inner sleeves, etc., made of Ta, Mo or Mo47Re
• Ribbons as raw material for the production of these components
• Porous W-cathodes, infiltrated with barium-aluminate