characterised by the material

Full Title

Details of electrodes, of magnetic control means, of screens, or of the mounting or spacing thereof, common to two or more basic types of discharge tubes or lamps (details of electron-optical or ion-optical arrangements H01J3/00) > Main electrodes > Solid thermionic cathodes > characterised by the material

Child Classifications

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• H01J 1/142 with alkaline-earth metal oxides, or such oxides used in conjunction with reducing agents, as an emissive material
• H01J 1/144 with other metal oxides as an emissive material
• H01J 1/146 with metals or alloys as an emissive material
• H01J 1/148 with compounds having metallic conductive properties, e.g. lanthanum boride, as an emissive material