Combustion initiators employing reduced work function stainless

Details Combustion initiators employing reduced work function stainless Combustion initiators employing reduced work function stainless

1995-08-25

1999-04-27

Font, Frank G.

Electric lamp and discharge devices

Spark plugs

Particular electrode structure or spacing

313118, 123169EL, H01T 1320, F02M 5706, F02P 1300, H01F 1300

Patent

active

058982574

ABSTRACT:
The electron emitting cathode of an initiator (spark plug or ignitor) comprises a small button of high temperature, preferably austenitic, stainless steel powder welded to a support conductor. The stainless steel powder has distributed through it a dopant powder consisting of a minor portion of a highly stable oxide of an element having a low work function. The dopant powder has a much smaller mesh size than the stainless steel powder (1/5or less). Rare earth lanthanides are preferred that have a low work function, preferably under 3.0 eV and are not radioactive. Cerium, in the form of CeO.sub.2 is most preferred. The compositions of the low work function stainless steel electrodes and methods of making the same are disclosed.

REFERENCES:
patent: 4427915 (1984-01-01), Nishio et al.
patent: 4742265 (1988-05-01), Giachino et al.
patent: 4881913 (1989-11-01), Mann
patent: 5395273 (1995-03-01), Matsutani
patent: 5461275 (1995-10-01), Oshima

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