Patent ID: 7019450
Filing Date: 2006-03-28
Classification: H01J

Abstract:
1. A cathode ray tube having at least one oxide cathode, comprising: a cathode carrier having a cathode base of a first cathode metal, said base further having a covering layer composed of ultrafine metal particles that contain nickel; and a cathode coating of an electron-emitting material containing a particle-particle composite material of oxide particles and metal particles, wherein said oxide particles comprise an oxide selected from the group consisting of 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 from the group consisting of the oxides of calcium, strontium and barium, and wherein said metal particles contain a second cathode metal selected from the group consisting of Ni, Co, Ir, Pd, Rh and Pt.