Influence of the Surface Tungsten Distribution on the Emission Properties of Barium Tungsten Cathode
Influence of the Surface Tungsten Distribution on the Emission Properties of Barium Tungsten Cathode
复制标题
表面钨分布对钡钨阴极发射性能的影响
DOI：
10.1109/ted.2020.2986034
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发表时间：
2020-06
影响因子：
3.1
通讯作者：
Zhang Jiuxing
中科院分区：
文献类型：
--
作者：
Shang Jihua;Yang Xinyu;Wang Ziyu;Hu Mengyuan;Han Cuiliu;Zhang Jiuxing
The porous tungsten matrixes of barium tungsten cathodes are prepared by spark plasma sintering (SPS). By adjusting the raw powder particle diameter and the porosity, the matrixes with different average distances between the pores are obtained. The microstructure and the emission performance of the barium tungsten cathode are analyzed using scanning electron microscopy (SEM), electron emission measurement system, and X-ray photoelectron spectroscopy (XPS). The average distances between the pores of three cathodes are 5.08, 5.74, and <inline-formula> <tex-math notation="LaTeX">$6.91\,\mu \text{m}$ </tex-math></inline-formula>, respectively. The cathode with a distance of <inline-formula> <tex-math notation="LaTeX">$5.74\,\,\mu \text{m}$ </tex-math></inline-formula> has the best zero-field current density and the lowest work function. With the increase in the pulsewidth, the variation rate of the current density for the 5.74-<inline-formula> <tex-math notation="LaTeX">$\mu \text{m}$ </tex-math></inline-formula> cathode is the smallest, indicating the emission stability is the best. The best emission performance can be ascribed to the formation of the optimal Ba–O dipoles’ coverage on the cathode surface.
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影响因子：
1
作者：
R. Cortenraad
通讯作者：
R. Cortenraad
DOI：
10.1016/s1003-6326(11)60742-5
发表时间：
2011-03-01
影响因子：
4.5
作者：
Hu Ke;Li Xiao-qiang;Li Yuan-yuan
通讯作者：
Li Yuan-yuan
火花等离子烧结中的烧结机理→火花放电发生的证明
影响因子：
6
作者：
Zhang, Zhao-Hui;Liu, Zhen-Feng;Wang, Yan-Dong
通讯作者：
Wang, Yan-Dong
影响因子：
5.2
作者：
D. Ghahremani;T. Ebadzadeh;A. Maghsodipour
通讯作者：
D. Ghahremani;T. Ebadzadeh;A. Maghsodipour
影响因子：
4.7
作者：
Liu, Xiaotao;Zhou, Qunfei;Balk, T. John
通讯作者：
Balk, T. John