| Electron emission mechanism of scandium-tungsten cathodes | |
| Cheng, Yin1,2; Sun, Yuan1; Zhou, Yizhou1; Wang, Shiyang1; Meng, Jie1 | |
| Corresponding Author | Sun, Yuan(yuansun@imr.ac.cn) ; Zhou, Yizhou(yzzhou@imr.ac.cn) |
| 2022-06-01 | |
| Source Publication | INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
 |
| ISSN | 0263-4368 |
| Volume | 105Pages:5 |
| Abstract | 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. |
| Keyword | Thermoelectric materials Crystal structure Electronic structure Density functional theory First-principle calculations |
| Funding Organization | 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 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | 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 Research Area | Materials Science ; Metallurgy & Metallurgical Engineering |
| WOS Subject | Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering |
| WOS ID | WOS:000793482500002 |
| Publisher | ELSEVIER SCI LTD |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/173891 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Sun, Yuan; Zhou, Yizhou |
| Affiliation | 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 |
| Recommended Citation 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. |
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