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AssigneeKoninklijke Philips Electronics N.V.
InventorsGeorg Friedrich Gaertner, David Steven Barratt, Christhoper James Goodhand, Detlef Raasch, Petrus Arthur Marie Van Der Heide, Timothy John Lee
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The invention relates to a cathode ray tube equipped with at least one oxide cathode comprising a cathode carrier having a cathode base of a first cathode metal and having a covering layer of ultrafine metal particles that contain nickel. Said oxide cathode also comprises a cathode coating of an electron-emitting material containing a particle-particle composite of oxide particles and metal particles. The oxide particles comprise an oxide selected among the oxides of scandium, yttrium and the lanthanoids cerium, praseodymium, neodymium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium and lutetium, and an alkaline earth oxide selected among the group consisting of the oxides of calcium, strontium and barium, and the metal particles contain a second cathode material selected from the group consisting of Ni, Co, Ir, Pd, Rh and Pt. The invention also relates to an oxide cathode.
A cathode ray tube fitted with at least one oxide cathode, which comprises a cathode carrier having a cathode base of a first cathode metal with a covering layer composed of ultrafine metal particles that contain nickel, and which further comprises a cathode coating of an electron-emitting material containing a particle-particle composite material of oxide particles and metal particles, which oxide particles comprise an oxide selected among the oxides of scandium, yttrium and the lanthanoids cerium, praseodymium, neodymium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium and lutetium, and an alkaline earth oxide selected among the group consisting of the oxides of calcium, strontium and barium, and the metal particles contain a second cathode metal selected from the group consisting of Ni, Co, Ir, Pd, Rh and Pt.
An oxide cathode, which comprises a cathode carrier having a cathode base of a first cathode metal with a covering layer composed of ultrafine metal particles that contain nickel, and which further comprises a cathode coating of an electron-emitting material containing a particle-particle composite material of oxide particles and metal particles, which oxide particles comprise an oxide selected among the oxides of scandium, yttrium and the lanthanoids cerium, praseodymium, neodymium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium and lutetium, and an alkaline earth oxide selected among the group consisting of the oxides of calcium, strontium and barium, and the metal particles contain a second cathode metal selected from the group consisting of Ni, Co, Ir, Pd, Rh and Pt.
Dependencies are inferred from the claim text.