End closure members for discharge lamps

Details End closure members for discharge lamps End closure members for discharge lamps

1983-11-17

1986-01-07

Lechart, Jr., Stephen J.

Specialized metallurgical processes, compositions for use therei

Compositions

Consolidated metal powder compositions

75235, 419 23, 419 32, 419 35, 419 42, 313636, C22C 3200

Patent

active

045632146

ABSTRACT:
An electrically conducting cermet for use in a closure assembly in a high pressure sodium discharge lamp which cermet comprises a sintered compact of refractory oxide granules and a conducting network extending throughout the cermet wherein said network is provided by a layer of niobium and, optionally, at least one other specified metal. The cermet is, because of the niobium content of the metallic network, permeable to hydrogen and lamps incorporating this cermet can therefore be stabilized in acceptable times.

REFERENCES:
patent: 4183746 (1980-01-01), Pearce et al.
"Detection and Measurement of the Effect of Hydrogen in High Pressure Sodium Discharge Lamps" by R. J. Campbell & W. Kroontje (pp. 394-396).

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