End closure members for discharge lamps

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

H - Electricity

01

B

31/117, 313/135

H01B 1/08 (2006.01) H01J 61/36 (2006.01)

Patent

CA 1190733

ABSTRACT OF THE DISCLOSURE 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 stabilised in acceptable times.

439773

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