HID lamp electrode comprising barium (yttrium or rare earth meta

Details HID lamp electrode comprising barium (yttrium or rare earth meta HID lamp electrode comprising barium (yttrium or rare earth meta

1977-10-26

1979-05-01

Rolinec, Rudolph V.

Electric lamp and discharge devices

With support and/or spacing structure for electrode and/or...

For plural electrodes of discharge device

313227, 313229, 313346R, 313213, H01J 114, H01J 6120

Patent

active

041526198

ABSTRACT:
For HID lamps, and particularly high-pressure mercury or sodium-mercury HID lamps, the electron-emissive material portion of the lamp electrodes is M.sub.3 M'.sub.2 M"O.sub.9 wherein M is alkaline-earth metal and at least principally comprises barium; M' is yttrium, a lanthanoid series metal, or any mixtures thereof; and M" is tungsten, molybdenum, or mixtures thereof. The specified material is very stable and highly emissive.

REFERENCES:
patent: 3170081 (1965-02-01), Rokosz
patent: 4052634 (1977-10-01), DeKok

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