Accession Number : AD0601256

Title :   EMITTER-COLLECTOR PAIRS FOR GAS PLASMA THERMIONIC ENERGY CONVERSION.

Descriptive Note : Final technical rept. Dec 62-Dec 63,

Corporate Author : CONSOLIDATED CONTROLS CORP DANBURY CONN

Personal Author(s) : Engdahl,R.

Report Date : DEC 1963

Pagination or Media Count : 66

Abstract : It was demonstrated that thermionic energy conversion can be accomplished in a converter consisting of emitter, collector, and auxiliary electrode operating in an inert gas. Twelve different rare earth emitters were evaluated for zero field vacuum emission characteristics. Using W and Gd203 as prime constituents, four different emitter fabrication methods were evaluated. Zero field pulse emission from Gd203 in a tungsten helix was measured at 9.6 amps/sq cm at 1450 C. A collector work function of 1.0 ev was attained by a nickel collector coated with 200 A of Al203 and evaporated barium. A collector work function of 0.9 ev was attained by a nickel collector coated cataphoretically with 20 microns of Gd203 and evaporated barium. A method for measuring collector work functions be means of electron absorption was developed and proven. (Author)

Descriptors :   (*PLASMAS(PHYSICS), THERMIONIC EMISSION), (*THERMIONIC CONVERTERS, MATERIALS), RARE EARTH ELEMENTS, GADOLINIUM COMPOUNDS, TUNGSTEN, WORK FUNCTIONS, IONIC CURRENT

Distribution Statement : APPROVED FOR PUBLIC RELEASE