Fabrication method of cathode member and electronic tube equippe

Details Fabrication method of cathode member and electronic tube equippe Fabrication method of cathode member and electronic tube equippe

1998-07-22

1999-03-09

Mai, Ngoclan

Powder metallurgy processes

Powder metallurgy processes with heating or sintering

Metal and nonmetal in final product

419 31, 419 33, 419 36, 419 49, 75246, 75235, 313346R, B22F 100

Patent

active

058813551

ABSTRACT:
A method of fabricating a cathode member or pellet is provided, which realizes the sufficiently large increase of the electron emission capability by the current activation process and that prevents the maximum cathode current from being lowered as long as an electron emissive agent exists in the cathode member. First, (a) a nickel powder and a rare-earth-metal oxide powder are provided. (b) The nickel powder and the rare-earth-metal oxide powder are uniformly mixed together, thereby producing a first powder mixture. (c) The first powder mixture is heated in a hydrogen atmosphere, an inert atmosphere, or a vacuum atmosphere, thereby producing an intermetallic compound of nickel and the rare-earth metal in the first powder mixture. (d) The first powder mixture containing the intermetallic compound is uniformly mixed with an electron-emissive agent powder, thereby producing a second powder mixture. (e) The second powder mixture is sintered by a HIP process, thereby forming a cathode member. The intermetallic compound produced in the first powder mixture has a function to chemically decompose the electron emissive agent to thereby increase the electron emission performance of the electron emissive agent.

REFERENCES:
patent: 2682511 (1954-06-01), Cronin
patent: 2957231 (1960-10-01), Davis et al.
patent: 3148056 (1964-09-01), Brodie et al.
patent: 4260665 (1981-04-01), Aida
patent: 5407633 (1995-04-01), Hasker et al.
patent: 5757115 (1998-05-01), Navita

Affiliated with

Also associated with

Rating

Fabrication method of cathode member and electronic tube equippe does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Fabrication method of cathode member and electronic tube equippe, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Fabrication method of cathode member and electronic tube equippe will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1332304