Title :
Investigation of influence of surface activator element on scandate cathodes work function
Author :
Zhang, Xizhu ; Wang, Jinshu ; Wang, Yiman ; Liu, Wei ; Zhou, Meiling
Author_Institution :
Coll. of Mater. Sci. & Eng., Beijing Univ. of Technol., Beijing, China
Abstract :
The surface analysis of scandate cathodes has revealed that active substances of Ba, Sc and O formed a layer on the surface of the cathodes. By using First-principles calculation method, the W and Ba-Sc-O-W systems were calculated to study the effect of active elements on the work function of the cathode.
Keywords :
barium; cathodes; oxygen; scandium; tungsten; work function; Ba-Sc-O-W; first-principle calculation method; scandate cathode work function; surface activator element; surface analysis; Barium; Cathodes; Crystals; Educational institutions; Energy states; Thermionic emission; Materials Studio; Scandate cathodes; work function;
Conference_Titel :
Vacuum Electron Sources Conference (IVESC), 2012 IEEE Ninth International
Conference_Location :
Monterey, CA
Print_ISBN :
978-1-4673-0368-2
DOI :
10.1109/IVESC.2012.6264177
