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Electron emission mechanism of scandium-tungsten cathodes

文献类型：期刊论文

作者Cheng, Yin1,2; Sun, Yuan2; Zhou, Yizhou2; Wang, Shiyang2; Meng, Jie2
刊名INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
出版日期2022-06-01
卷号105页码:5
ISSN号0263-4368
关键词Thermoelectric materials Crystal structure Electronic structure Density functional theory First-principle calculations
DOI10.1016/j.ijrmhm.2022.105828
通讯作者Sun, Yuan(yuansun@imr.ac.cn) ; Zhou, Yizhou(yzzhou@imr.ac.cn)
英文摘要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.
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
语种英语
出版者ELSEVIER SCI LTD
WOS记录号WOS:000793482500002
资助机构National Science and Technology Major Project ; Key Specialized Research and Development Breakthrough - unveiling and Commanding the Special Project Program in Liaoning Province
源URL[http://ir.imr.ac.cn/handle/321006/173890]  
专题金属研究所_中国科学院金属研究所
通讯作者Sun, Yuan; Zhou, Yizhou
作者单位1.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China
2.Chinese Acad Sci, Shi Changxu Innovat Ctr Adv Mat, Inst Met Res, 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.

入库方式： OAI收割

来源：金属研究所

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