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Cermet cathodes: A new technology for CRT applications

Abstract— In this paper, we present results for a new type of cermet cathode (Oxide Plus) in a range of CRT tube types including wide‐screen 32‐in. and 34‐in. tubes together with 19‐in. computer‐monitor tubes. The results indicate that the cermet cathode exhibits good performance in all types of tube where previously oxide cathodes were not suitable and only Ba‐dispnser cathodes could be used. We also illustrate a new suspended cathode structure compatible with RCA‐type cathodes that could enable a wider adoption of this new technology.