2026-10-12T11:35:47Z https://www.scidb.cn/oai

10.57760/sciencedb.j00186.00462 2024-12-24T19:24:19Z

2024-12-24 High-performance Field Emission Rare Earth Tungsten Alloy Cathodes Dataest doi:10.57760/sciencedb.j00186.00462 en Based on first-principles calculations using density functional theory, this study constructs atomic models of W cathode surfaces doped with different rare earth atoms. Using a (2×2×1) W(001) surface model, 1 ML of O atoms is adsorbed on the top site of the surface, followed by doping rare earth atoms (La, Ce, Y) into the W-O lattice vacancy sites. The work functions of the system with rare earth atom coverages of 0.5 ML and 1 ML were calculated. Through liquid phase synthesis, plasma discharge sintering, and heat treatment, nano-scale second-phase rare earth oxides (La₂O₃, CeO₂, Y₂O₃, etc.)–tungsten cathodes were produced. Different ignition experiments were designed to simulate various operating conditions. The cascade arc plasma source was used for mass-loss and lifetime prediction tests on the cathode materials. After testing, SEM and EDS microscopic characterizations of the cathode materials were conducted to analyze their composition, morphology, and elemental distribution. Field emission cathode; Rare earth tungsten alloy; First-principles calculations; Work function Wu Tao Jinxing Zheng Haiyang Liu Yudong Lu Yifan Du Meiqi Wu Jiaming Shi Maolin Ke PUBLIC https://creativecommons.org/publicdomain/zero/1.0/ dataset Science Data Bank