Fabrication and emission property of polycrystalline CexPr1-xB6 bulk prepared by spark plasma sintering

In this paper, the polycrystalline Ce
_x
Pr
_1-x
B
₆
(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
_0.6
Pr
_0.4
B
₆
is 47.3 A·cm
^-2
at 1973K with voltage up to 950 V.