Electron emission mechanism of scandium-tungsten cathodes

doi:10.1016/j.ijrmhm.2022.105828

IMR OpenIR

	Electron emission mechanism of scandium-tungsten cathodes
	Cheng, Yin 1,2; Sun, Yuan 1; Zhou, Yizhou 1; Wang, Shiyang 1; Meng, Jie 1
通讯作者	Sun, Yuan(yuansun@imr.ac.cn) ; Zhou, Yizhou(yzzhou@imr.ac.cn)
	2022-06-01
发表期刊	INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
ISSN	0263-4368
卷号	105 页码:5
摘要	Scandium-tungsten (Sc-W) cathodes have garnered a lot of research attention due to their high emission current density. This study investigates the electronic properties of Sc-W cathodes using the VASP code to explain the operating mechanism of hot electron emission. The results reveal that the work function is decreased by 0.58 eV, whereas the charge density in the crystal structure, the number of high valence electrons and the energy of electrons increase when Sc content is increased from 1% to 2%. Moreover, the bandgap and energy required for electrons to jump from the valence band to the conduction band decreased with the increase of Sc content, enhancing the current emission density and reducing the work function of the cathode.
关键词	Thermoelectric materials Crystal structure Electronic structure Density functional theory First-principle calculations
资助者	National Science and Technology Major Project ; Key Specialized Research and Development Breakthrough - unveiling and Commanding the Special Project Program in Liaoning Province
DOI	10.1016/j.ijrmhm.2022.105828
收录类别	SCI
语种	英语
资助项目	National Science and Technology Major Project[J2019-VI-0018-0133] ; Key Specialized Research and Development Breakthrough - unveiling and Commanding the Special Project Program in Liaoning Province[2021JH15]
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000793482500002
出版者	ELSEVIER SCI LTD
引用统计	被引频次：4[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/173891
专题	中国科学院金属研究所
通讯作者	Sun, Yuan; Zhou, Yizhou
作者单位	1.Chinese Acad Sci, Shi Changxu Innovat Ctr Adv Mat, Inst Met Res, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Cheng, Yin,Sun, Yuan,Zhou, Yizhou,et al. Electron emission mechanism of scandium-tungsten cathodes[J]. INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS,2022,105:5.
APA	Cheng, Yin,Sun, Yuan,Zhou, Yizhou,Wang, Shiyang,&Meng, Jie.(2022).Electron emission mechanism of scandium-tungsten cathodes.INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS,105,5.
MLA	Cheng, Yin,et al."Electron emission mechanism of scandium-tungsten cathodes".INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS 105(2022):5.