Manufacturing method of oxide cathode

Details Manufacturing method of oxide cathode Manufacturing method of oxide cathode

1989-12-18

1991-10-08

Ramsey, Kenneth J.

Electric lamp or space discharge component or device manufacturi

Process

Electrode making

427 77, H01J 904

Patent

active

050550780

ABSTRACT:
A manufacturing method of oxide cathode for electron tube in which adding method of scandium Sc and yttrium Y for extending duration of ternary carbonate solid solution is improved and excellent effects is obtained so that duration and electron emitting characteristics are improved. The invention is carried out by obtaining quinary (Ba, Sr, Ca, Sc, Y) carbonate and painting this on cap whereby manufacturing electron emitting substance layer. According to the invention, extension of duration and improvement of electron emitting characteristic can be obtained.

REFERENCES:
patent: 4675570 (1987-06-01), Green
patent: 4957463 (1990-09-01), Branovich et al.

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