Electric lamp and discharge devices – Electrode and shield structures – Cathodes containing and/or coated with electron emissive...
Patent
1997-11-07
1999-07-20
Patel, Vip
Electric lamp and discharge devices
Electrode and shield structures
Cathodes containing and/or coated with electron emissive...
313446, 313346DC, 313337, H01J 114
Patent
active
059259760
ABSTRACT:
A cathode for an electron tube is described that has little deterioration of emission current after long operation, is used as a long-life oxide cathode even with high current density in a CRT, and is economical. An emissive material is adhered onto a substrate that is positioned at one opening of a cylindrical sleeve having a built-in heater coil and that includes nickel as a main component by thermally decomposing carbonate including an alkaline earth metal oxide and at least one element selected from the group consisting of titanium, nickel, zirconium, vanadium, niobium and tantalum.
REFERENCES:
patent: 1870951 (1932-08-01), Fredenburgh
patent: 2703790 (1955-03-01), Anderson
patent: 4797593 (1989-01-01), Saito et al.
patent: 4924137 (1990-05-01), Watanabe et al.
patent: 5059856 (1991-10-01), Derks
patent: 5347194 (1994-09-01), Derks
Bol'Shakov, et al., "Phase imhomogeneity of mixed crystals of alkaline earth carbonates and its influence on the properties of oxide cathodes", Inorganic Materials, vol. 13, No. 5, May 1997, pp. 1025-1028.
Hayashida Yoshiki
Kawasaki Masaki
Ozawa Tetsuro
Sakurai Hiroshi
Matsushita Electronics Corporation
Patel Vip
LandOfFree
Cathode for electron tube having specific emissive material does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Cathode for electron tube having specific emissive material, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Cathode for electron tube having specific emissive material will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1324465