公开(公告)号：DE60137305D1

公开(公告)日：2009-02-26

申请号：DE60137305

申请日：2001-09-06

Applicant: PHILIPS INTELLECTUAL PROPERTY

Inventor： GAERTNER GEORG F ,  VAN DER HEIDE PETRUS A ,  JOHNSTONE WYNDHAM M

IPC: H01J1/142 ,  H01J1/20 ,  H01J29/04

Abstract: A cathode ray tube provided with at least one oxide cathode comprising a cathode carrier with a cathode base of a cathode metal and a cathode coating of an electron-emitting material containing a particle-particle composite material of oxide particles of an alkaline earth oxide selected from the group formed by the oxides of calcium, strontium and barium, and oxide particles having a first grain size distribution of an oxide selected from the group formed by the oxides of scandium, yttrium and the lanthanoids, and oxide particles having a second grain size distribution of an oxide selected from the group formed by the oxides of scandium, yttrium and the lanthanoids. The invention also relates to an oxide cathode.