Cathode coating for thermionic arc discharge lamp cathodes

Details Cathode coating for thermionic arc discharge lamp cathodes Cathode coating for thermionic arc discharge lamp cathodes

C - Chemistry, Metallurgy

25

B

C25B 11/00 (2006.01) H01J 1/142 (2006.01) H01J 61/04 (2006.01) H01J 61/067 (2006.01)

Patent

CA 2390675

An arc discharge lamp has an evacuated, electromagnetic-energy-transmissive envelope having therein an arc generating and sustaining medium. At least one thermionic, electron- emitting cathode is positioned within the envelope, and the cathode has an electron emissive coating thereon containing silicon carbide.

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