Emission properties, microstructure and surface composition of scandate impregnated cathodes with tungsten and a tungsten-rhenium matrix

Author

Makarov, A.P. ; Bersneva, E.U. ; Zemchikhin, E.M. ; Chistova, G.I.

Author_Institution

JSC “RPC”Istok” named after Shokin, Fryazino, Russia

fYear

2014

fDate

June 30 2014-July 4 2014

Firstpage

1

Lastpage

2

Abstract

The investigation of emissive ability, lifetime, structure and component surface composition of scandate cathodes with a matrix of tungsten and of tungsten-rhenium matrix impregnated with barium-calcium aluminate (4:1:1 or 6:1:2 moles) with 0.5-5 weight nonuniform emission can be explained by formation of crystals up to 100 nm in size consisting mainly of scandium oxide, barium oxide and calcium oxide.

Keywords

barium compounds; calcium compounds; cathodes; crystal microstructure; electron field emission; rhenium compounds; surface composition; tungsten compounds; vacuum microelectronics; WReScO₃-BaCaAlO₄; WScO₃-BaCaAlO₄; barium oxide; barium-calcium aluminate; calcium oxide; component surface composition; crystal formation; microstructure; nonuniform emission; scandate impregnated cathodes; scandium oxide; tungsten-rhenium matrix; Barium; Calcium; Cathodes; Microscopy; Powders; Surface treatment; Tungsten;

fLanguage

English

Publisher

ieee

Conference_Titel

Vacuum Electron Sources Conference (IVESC), 2014 Tenth International

Conference_Location

St. Petersburg

Print_ISBN

978-1-4799-5770-5

Type

conf

DOI

10.1109/IVESC.2014.6892027

Filename

6892027