Cathode ray tube with a particle-particle cathode coating

Details Cathode ray tube with a particle-particle cathode coating Cathode ray tube with a particle-particle cathode coating

2006-03-28

2006-03-28

Santiago, Mariceli (Department: 2879)

Electric lamp and discharge devices

Electrode and shield structures

Cathodes containing and/or coated with electron emissive...

C313S3460DC

Reexamination Certificate

active

07019450

ABSTRACT:
The invention relates to a cathode ray tube equipped with at least one oxide cathode comprising a cathode carrier having a cathode base of a first cathode metal and having a covering layer of ultrafine metal particles that contain nickel. The oxide cathode also comprises a cathode coating of an electron-emitting material containing a particle-particle composite of oxide particles and metal particles. The oxide particles comprise an oxide selected among the oxides of scandium, yttrium and the lanthanoids cerium, praseodymium, neodymium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium and lutetium, and an alkaline earth oxide selected among the group consisting of the oxides of calcium, strontium and barium, and the metal particles contain a second cathode material selected from the group consisting of Ni, Co, Ir, Pd, Rh and Pt. The invention also relates to an oxide cathode.

REFERENCES:
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patent: 5118984 (1992-06-01), Saito et al.
patent: 5592043 (1997-01-01), Gartner et al.
patent: 6124666 (2000-09-01), Saito et al.
patent: 6348756 (2002-02-01), Gartner et al.
patent: 6545397 (2003-04-01), Ohira et al.
patent: 11204019 (1999-11-01), None

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