Title :
High current density Scandate doped pressed cathode fabrication
Author :
Cui, Y.T. ; Wang, J.S. ; Liu, Wenxin ; Wang, Y.M.
Author_Institution :
Coll. of Mater. Sci. & Eng., Beijing Univ. of Technol., Chaoyang, China
Abstract :
In this paper, scandate doped pressed (SDP) cathodes were prepared by a new method of spray drying combined with two-step hydrogen reduction, instead of traditional mechanical mixing of scandium oxide and barium-calcium aluminates with tungsten. The microstructure, element distribution, and emission properties of the cathodes have been characterized by scanning electron microscope, energy dispersive spectrometer, and an emission test system, respectively.
Keywords :
cathodes; current density; doping; drying; electron emission; scandium compounds; scanning electron microscopy; spraying; SDP cathode; Sc2O3; current density; element distribution; energy dispersive spectrometer; microstructure; scandate doped pressed cathode; scanning electron microscopy; spray drying; two step hydrogen reduction;
Conference_Titel :
Vacuum Electron Sources Conference and Nanocarbon (IVESC), 2010 8th International
Conference_Location :
Nanjing
Print_ISBN :
978-1-4244-6645-0
DOI :
10.1109/IVESC.2010.5644403
