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

fYear

2012

fDate

24-26 April 2012

Firstpage

179

Lastpage

180

Abstract

In this paper, the polycrystalline Ce_xPr_1-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 Ce_0.6Pr_0.4B₆ is 47.3 A·cm^-2 at 1973K with voltage up to 950 V.

Keywords

cerium compounds; field emission; plasma materials processing; sintering; Ce_xPr_1-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;

fLanguage

English

Publisher

ieee

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

Type

conf

DOI

10.1109/IVEC.2012.6262122

Filename

6262122