Title :
Fabrication and emission property of polycrystalline CexPr1-xB6 bulk prepared by spark plasma sintering
Author :
Li, Xiao-na ; Zhang, Jiu-xing ; Zhang, Xin ; Bao, Li-hong ; Zhang, Ning
Author_Institution :
Key Lab. of Adv. Functional Mater. of Educ., Beijing Univ. of Technol., Beijing, China
Abstract :
In this paper, the polycrystalline CexPr1-xB6 (0≤x≤0.6)) bulks were successfully fabricated by spark plasma sintering (SPS). A lot of experiments are conducted to testing the mechanical and emission properties. The technological applications parameters are following: the sintering temperature is 1450°C, the sintering pressure is 50 MPa and the holding time is 5 min. The maximum pulse thermionic emission density of Ce0.6Pr0.4B6 is 47.3 A·cm-2 at 1973K with voltage up to 950 V.
Keywords :
cerium compounds; field emission; plasma materials processing; sintering; CexPr1-xB6; emission properties; emission property; holding time; maximum pulse thermionic emission density; mechanical properties; polycrystalline bulk; sintering pressure; sintering temperature; spark plasma sintering; Current density; Mechanical factors; Plasma temperature; Sparks; Temperature; emission property; rare earth hexaborides; spark plasma sintering;
Conference_Titel :
Vacuum Electronics Conference (IVEC), 2012 IEEE Thirteenth International
Conference_Location :
Monterey, CA
Print_ISBN :
978-1-4673-0188-6
Electronic_ISBN :
978-1-4673-0187-9
DOI :
10.1109/IVEC.2012.6262122
