钒酸锶:一种超低功函数电子发射材料

2015 IEEE International Vacuum Electronics Conference (IVEC) Pub Date : 2015-04-27 DOI:10.1109/IVEC.2015.7223772

R. Jacobs, D. Morgan, J. Booske

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引用次数: 1

摘要

钒酸锶(strtium vanadate, SrVO3)是一种过渡金属钙钛矿氧化物，利用密度泛函理论预测其功函数为1.79 eV。在SrVO3中掺入Ba，导致Ba在发射表面偏析，产生的超低功函数仅为1.07 eV。与ba浸渍的W和钪阴极相比，这种富含ba的发射表面预计寿命很长。

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Strontium vanadate: An ultra-low work function electron emission material

Strontium vanadate, SrVO3, is a transition metal perovskite oxide with a low predicted work function of 1.79 eV using Density Functional Theory. Alloying SrVO3 with Ba resulted in Ba segregation to the emitting surface, producing an ultra-low work function of only 1.07 eV. This Ba-enriched emitting surface is predicted to be very long-lived compared to Ba-impregnated W and scandate cathodes.

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2015 IEEE International Vacuum Electronics Conference (IVEC)

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