Directly heater oxide cathode and production thereof

Patent · Tue May 01 00:00:00 EDT 1984

OSTI ID:6452837

Kumada, M; Misumi, A

A directly heated type oxide cathode comprising a base made of an alloy containing Ni as a major component and Zr as a reducing agent, a coating of Co powders or a mixture of Ni powders and Co powders wherein the average particle size of the Co powders is smaller than that of Ni powders formed on the base, and an electron emissive alkaline earth oxide layer formed on the coating of Co powders or the mixture of Ni powders and Co powders does not show deformation of the base or peeling of the oxide layer during the production procedure or operation of electron tubes and the like.

• Assignee: Hitachi Ltd. (Japan)
• Patent Number(s): US 4446404
• OSTI ID: 6452837
• Resource Relation: Patent Priority Date: Priority date 12 Sep 1979, Japan; Other Information: PAT-APPL-186742
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
CATHODES
COATINGS
DESIGN
FABRICATION
ALKALINE EARTH METAL COMPOUNDS
COBALT
DEPOSITION
DISPLAY DEVICES
ELECTRONIC EQUIPMENT
MIXTURES
NICKEL ALLOYS
PARTICLE SIZE
POWDERS
SURFACE COATING
ZIRCONIUM COMPOUNDS
ALLOYS
DISPERSIONS
ELECTRODES
ELEMENTS
EQUIPMENT
METALS
SIZE
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
420800* - Engineering- Electronic Circuits & Devices- (-1989)