Electric lamp and discharge devices – Electrode and shield structures – Cathodes containing and/or coated with electron emissive...
Patent
1995-12-08
1997-11-04
O'Shea, Sandra L.
Electric lamp and discharge devices
Electrode and shield structures
Cathodes containing and/or coated with electron emissive...
313270, 313346DC, H01J 114
Patent
active
056843577
ABSTRACT:
A thermion emitting oxide cathode comprising a metal cap and a cathode sleeve, the metal cap being coated with a thermion emitting material layer containing a barium-based alkaline earth metal, wherein the thermion emitting material layer is made of a titanate of the barium-based alkaline earth metal. The thermion emitting oxide cathode is made by mixing a titanium tetrachloride (TiCl.sub.4) with an aqueous solution of mixture into an oxalate solution of 80.degree. C., thereby precipitating a O.sub.4).sub.2.4H.sub.2 O!, and treating the precipitated barium-strontium-calcium titanate hydrate at a temperature of 500.degree. to 700.degree. C. to remove a plurality of water molecules, thereby producing a suspension of barium-strontium-calcium titanate
REFERENCES:
patent: 2866915 (1958-12-01), Fang
patent: 4924137 (1990-05-01), Watanabe et al.
patent: 5118984 (1992-06-01), Saito et al.
Kudaka et al., "Some Observation on the Aggregate Particles Produced During Pyrolysis of PTC Barium Titanate Precursor Synthesized by the Oxalate Method", Journal of the Ceramic Society of Japan, vol. 102, No. 5, May 1994 Tokyo.
Choi Jong-seo
Choi Kwi-seuk
Joo Kyu-nam
Kim Geun-bae
Lee Kwang-min
O'Shea Sandra L.
Patel Vip
Samsung Display Devices Co. Ltd.
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