Multiple layer composite electrodes for discharge lamps and low

Details Multiple layer composite electrodes for discharge lamps and low Multiple layer composite electrodes for discharge lamps and low

1997-04-03

1998-12-08

Ramsey, Kenneth J.

Electric lamp and discharge devices

Electrode and shield structures

Cathodes containing and/or coated with electron emissive...

445 51, 445 59, 313491, H01J 61067

Patent

active

058474978

ABSTRACT:
Lamps that include composite sintered electrodes with improved properties that make them suitable for use in a variety of lamp types, are provided by a method for producing electrodes which comprise a refractory metal and a refractory emitter oxide, either single layer or multiple layer, the composites having been subjected to sintering at an elevated temperature effective to form a composite electrode having a density of at least 85%, preferably in the presence of a sintering activator, such as for example, Ni, or mixture thereof with a sintering aid such as, for example Li.sub.2 O.

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