Thermionic emitter of lanthanum strontium vanadates

Details Thermionic emitter of lanthanum strontium vanadates Thermionic emitter of lanthanum strontium vanadates

1974-04-08

1976-03-16

Padgett, Benjamin R.

Electric lamp and discharge devices

Electrode and shield structures

Cathodes containing and/or coated with electron emissive...

313337, 252518, 252521, H01J 114, H01J 1906, H01B 106

Patent

active

039448665

ABSTRACT:
A thermionic emitter for apparatus such as electron microscopes, scanning electron microscopes, and high power vacuum tubes which require a source of electrons formed from lanthanum strontium vanadate which is prepared from the compounds La.sub.(1.sub.-x) Sr.sub.(x) VO.sub.3, where x is the fraction of strontium (Sr) incorporated into LaVO.sub.3. The value of x lies between 0.1 and 0.4.

REFERENCES:
patent: 2639399 (1953-05-01), Lafferty
patent: 3312856 (1967-04-01), Lafferty et al.
patent: 3440475 (1969-04-01), Schiller et al.
patent: 3630770 (1971-12-01), Favreau

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