NDLI: Long term life-tests of bimetal oxide-coated cathode

Content Provider	IEEE Xplore Digital Library
Author	Roquais, J.M. Poret, F. Wierschke, D.J.
Copyright Year	2004
Description	Author affiliation: Lab. d'Optique Electronique, Thomson / S.B.U. Displays, Genlis, France (Roquais, J.M.; Poret, F.)
Abstract	Summary form only given. The oxide-coated cathode is still the most widely used electron emitter in CPTs thanks to its low cost and excellent emitting properties. Both the emissive oxide and the base metal vary from one manufacturer to another. Schematically, this cathode is composed of a 60 to 150 thick nickel alloy substrate called the base metal, covered with a 50 to 100 thick porous layer of alkaline-earth oxide. Depending on the desired application, the coating and the base metal can be optimised so as to get the best emitting properties. Long-term life tests were run in CPTs in standard and stressful conditions and emission performances measured. Several types of base-metal were compared. The influence of the nature of the base-metal and its chemical composition (reducing elements contents) on life was studied. The effect of temperature will be also discussed. The results obtained allow proposing an optimised bimetal ensuring excellent longevity of the cathodes. They also give an insight into the mechanism of operation of the oxide cathode.
File Size	38025
File Format	PDF
ISBN	0780384377
DOI	10.1109/IVESC.2004.1414209
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2004-09-06
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Performance evaluation Costs Nickel alloys Measurement standards Life testing Electron guns Manufacturing Chemical elements Coatings Cathodes
Content Type	Text
Resource Type	Article

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