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- W3209686546 abstract "本文分别从基体和铝酸盐两方面优化了钡钨阴极。在基体方面，首先采用窄粒度钨粉结合放电等离子体烧结获得了孔径分布窄的基体。再利用射频等离子体球化技术制备了球形钨粉，采用球形钨粉制备了多孔基体，获得了孔通道光滑，内孔连通性好，孔径分布更加窄的基体。与窄粒度钨粉基体相比，发现球形钨粉制备的阴极，空间电荷限制区的斜率由1.25增加至1.37，发射均匀性得到提高，拐点电流密度由6.6 A/cm2增至6.96 A/cm2。在此基础上，采用液相法改善了铝酸盐物相组成，发现空间电荷限制区的斜率增加至1.44，拐点电流密度增加至21.2 A/cm2。通过理论计算对钡钨阴极发射的物理本质进行了研究，发现钡钨阴极发射规律遵循偶极子理论。" @default.
- W3209686546 created "2021-11-08" @default.
- W3209686546 date "2021-01-01" @default.
- W3209686546 modified "2023-10-17" @default.
- W3209686546 title "Improvement of barium tungsten cathode and investigation of thermionic emission performance" @default.
- W3209686546 doi "https://doi.org/10.7498/aps.70.20211684" @default.
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