Negative electron affinity spark plug

Details Negative electron affinity spark plug Negative electron affinity spark plug

1995-01-27

1996-08-27

O'Shea, Sandra L.

Electric lamp and discharge devices

Spark plugs

Particular electrode structure or spacing

313131A, H01T 1322

Patent

active

055504256

ABSTRACT:
A spark plug having a positive electrode spark tip which is covered with a ery thin layer (.ltoreq.20 nanometers) of very hard NEA material having very large chemical binding energies such that most elements, including carbon and nitrogen, will not bind to its surface. The NEA material may be sapphire, or may be an n-type impurity-doped semiconductor material such as n-type AlN, cBN, or GaAlN having a bandgap exceeding 5.5 eV.

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patent: 4539503 (1985-09-01), Esper et al.
patent: 4659960 (1987-04-01), Toya et al.
patent: 4692657 (1987-09-01), Grunwald et al.
patent: 4910428 (1990-03-01), Strumbos

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