Vacuum最新文献

{"title":"Composition design and hard magnetic properties of high-entropy alloys","authors":"Dianguo Ma ,&nbsp;Xiaojun Zhang ,&nbsp;Meng Wang ,&nbsp;Wei Zhang ,&nbsp;Yingmin Wang ,&nbsp;Zhenya Song ,&nbsp;Xiaogang You ,&nbsp;Zhiqiang Song ,&nbsp;Zhongkai Guo ,&nbsp;Mingji Zong ,&nbsp;Yanli Zhu ,&nbsp;Lincai Zhang","doi":"10.1016/j.vacuum.2026.115152","DOIUrl":"10.1016/j.vacuum.2026.115152","url":null,"abstract":"<div><div>A hard magnetic high-entropy alloy (HEA) Fe₃₅Co₂₀Ni₅Pt₁₅B₂₅ was designed and prepared by a two-step process of melt-spinning and subsequent annealing in high vacuum conditions. A nanocomposite structure consisting of amorphous and fcc-(Fe, Co, Ni)Pt phases was obtained in as-quenched alloy, while a composite structure composing of nanoscaled <em>L</em>1₀-(Fe, Co, Ni)Pt and (Fe, Co, Ni)₂B phases was created after an appropriate vacuum annealing. The annealed HEA exhibited hard magnetic properties. The coercivity (_i<em>H</em>_c), saturation magnetizations (<em>B</em>_s), remanence ratio (<em>M</em>_r<em>/M</em>_s), and the maximum energy product ((<em>BH</em>)_max) of the annealed Fe₃₅Co₂₀Ni₅Pt₁₅B₂₅ high-entropy alloy were in the ranges of 207.7–996.6 kA/m, 0.50–0.77 T, 0.64–0.70, and 18.3–21.7 kJ/m³, respectively. When the annealing temperature was increased, _i<em>H</em>_c firstly increased to a maximum value of 996.6 kA/m, and then decrease. The good hard magnetic property is due to the formation of homogeneous nanocomposite structure in the annealed HEA, leading to exchange couplings among the nano-sized hard <em>L</em>1₀-(Fe, Co, Ni)Pt and soft (Fe, Co, Ni)₂B magnetic phases.</div></div>","PeriodicalId":23559,"journal":{"name":"Vacuum","volume":"247 ","pages":"Article 115152"},"PeriodicalIF":3.9,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146174101","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Bottom-up design and efficient synthesis of layer-structured thermoelectric materials for power generation: the case of Bi2Se3","authors":"Yulong Yang ,&nbsp;Decheng An ,&nbsp;Zhiyong Si ,&nbsp;Wutao Yang ,&nbsp;Wang Yue ,&nbsp;Linlin Shi ,&nbsp;Xian-Ming Zhang","doi":"10.1016/j.vacuum.2026.115149","DOIUrl":"10.1016/j.vacuum.2026.115149","url":null,"abstract":"<div><div>Bi₂Se₃ topological insulator is a promising layer-structured thermoelectric compound, whose cleavage fracture behavior in in-plane direction restricts the assembly and reliability of power generation devices. Here we propose a universal bottom-up approach for designing and fabricating reliable Bi₂Se₃ thermoelectric power generator. The iodine-doped Bi₂Se₃ polycrystalline sample was synthesized via solvothermal and chemical-etching processes. The anion etching induced defect chemistry in Bi₂Se₃ was dominated via charged selenium vacancies, which results in the improved carrier concentration (∼10¹⁹ cm⁻³). Similar to “sister material” Bi₂Te₃, in-plane figure of merit <em>zT</em> value is higher than out-of-plane <em>zT</em> for the same composition Bi₂Se₃I_0.01. We further employ the high-throughput screening and physical vapor deposition techniques to develop aluminum as an effective metallization layer for direct bonding to in-plane Bi₂Se₃I_0.01. This thermally/mechanically stable and ohmic contact interface ensure the n-type Bi₂Se₃ single-leg to realize a conversion efficiency of 2.5 % under a temperature difference of 250 K. The present work points to a general paradigm for advancing anisotropic thermoelectric semiconductor devices.</div></div>","PeriodicalId":23559,"journal":{"name":"Vacuum","volume":"247 ","pages":"Article 115149"},"PeriodicalIF":3.9,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146174075","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Corn cob-derived graphene oxide for ciprofloxacin residue determination: Dispersive solid-phase extraction optimization via response surface methodology","authors":"Rinawati ,&nbsp;Dian Muthia ,&nbsp;Hinaya Viebrienty ,&nbsp;Sonny Widiarto ,&nbsp;Agung Kiswandono ,&nbsp;Fahamsyah H. Latief ,&nbsp;Achmad Gus Fahmi ,&nbsp;Iwan Syahjoko Saputra","doi":"10.1016/j.vacuum.2025.115016","DOIUrl":"10.1016/j.vacuum.2025.115016","url":null,"abstract":"<div><div>This study reports the successful synthesis of graphene oxide (GO) from renewable corn cob agricultural waste using a modified Hummers method for its application as an adsorbent in Dispersive Solid Phase Extraction (DSPE) of Ciprofloxacin (CIP), established through the utilization of corn cob-derived GO as a low-cost, sustainable DSPE phase. Characterization confirmed the structural and chemical transformation: Scanning Electron Microscopy (SEM) showed the change from dense graphite particles to highly wrinkled, thin GO nanosheets, indicative of successful exfoliation. X-ray Diffraction (XRD) revealed the complete loss of the sharp graphite (002) peak at 2θ = 26.60° and the emergence of a broad, shifted peak at 2θ approximately 10°, confirming the increased interlayer spacing and the material's amorphous/highly disordered structure due to functional group intercalation. Energy-Dispersive X-ray Spectroscopy (EDX) verified the chemical change, showing a significant increase in oxygen content from 14.76 At% in graphite to 25.08 At% in GO. The DSPE process parameters were optimized using Response Surface Methodology (RSM) with a Box-Behnken Design. The optimal conditions for CIP adsorption were determined to be 20 mg of GO, a pH of 3.75, a CIP concentration of 752.92 ppb, and a contact time of 34.14 min. The GO exhibited a high maximum adsorption percentage of 99.26 %. This work demonstrates the significant potential of corn cob-derived GO as a low-cost, sustainable, and highly effective solid phase for environmental monitoring and extraction of pharmaceutical residues like CIP.</div></div>","PeriodicalId":23559,"journal":{"name":"Vacuum","volume":"246 ","pages":"Article 115016"},"PeriodicalIF":3.9,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145927245","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A novel double-gap dielectric barrier discharge (DG-DBD) for enhanced ozone generation","authors":"Brahim el Khalil Oulad Naoui ,&nbsp;Said Nemmich ,&nbsp;Kamel Nassour ,&nbsp;Essama Ahmed Ghaitaoui ,&nbsp;Noureddine Oulad Naoui ,&nbsp;El Mabrouk Khelifi ,&nbsp;Amar Tilmatine","doi":"10.1016/j.vacuum.2026.115071","DOIUrl":"10.1016/j.vacuum.2026.115071","url":null,"abstract":"<div><div>This study experimentally investigated a double-gap dielectric barrier discharge (DBD) reactor for ozone generation, comparing it to a conventional single-gap design under identical operating conditions. Electric field simulations revealed that the double-gap configuration achieved a more uniform and intensified electric field, with peak values reaching 1.4 × 10 7 V/m, substantially surpassing the single-gap's peak value of about 1 × 10 7 V/m. Voltage-current characteristics, Lissajous figures, and waveform analysis confirmed improved discharge behavior and reduced energy consumption in the double-gap reactor (19.5 W vs. 29.5 W). The influence of frequency, voltage, and oxygen flow rate on performance was also evaluated. In terms of performance, the DBD-DG system produced approximately 4.5–5.0 g/h of ozone, compared to 3.5–4.0 g/h for the DBD-SG, and achieved an energy efficiency of 250 g/kWh, twice that of the DBD-SG (125 g/kWh). These results establish the double-gap configuration as a promising, energy-efficient alternative for scalable, high-yield ozone generation.</div></div>","PeriodicalId":23559,"journal":{"name":"Vacuum","volume":"246 ","pages":"Article 115071"},"PeriodicalIF":3.9,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145927252","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Epitaxial growth and properties of ZnGa2O4 nanowire arrays on c-plane GaN/LiGaO2 substrate","authors":"Zhixuan Liao ,&nbsp;Nuoya Li ,&nbsp;Zhicheng Zhang ,&nbsp;Lilin Wang ,&nbsp;Chenlong Chen","doi":"10.1016/j.vacuum.2026.115066","DOIUrl":"10.1016/j.vacuum.2026.115066","url":null,"abstract":"<div><div>Well-aligned single-crystalline ZnGa₂O₄ nanowire arrays with high crystallinity and pronounced bottom interconnections were successfully epitaxially grown on c-plane GaN/LiGaO₂ substrates by chemical vapor deposition (CVD). The nanowires, with diameters in the range of 40–120 nm, developed along seven equivalent crystallographic directions of [111], [<span><math><mrow><mover><mn>1</mn><mo>‾</mo></mover></mrow></math></span> 11], [1<span><math><mrow><mover><mn>1</mn><mo>‾</mo></mover></mrow></math></span> 1], [11<span><math><mrow><mover><mn>1</mn><mo>‾</mo></mover></mrow></math></span>], [<span><math><mrow><mover><mn>1</mn><mo>‾</mo></mover><mover><mn>1</mn><mo>‾</mo></mover></mrow></math></span> 1], [1<span><math><mrow><mover><mn>1</mn><mo>‾</mo></mover><mover><mn>1</mn><mo>‾</mo></mover></mrow></math></span>] and [<span><math><mrow><mover><mn>1</mn><mo>‾</mo></mover></mrow></math></span> 1<span><math><mrow><mover><mn>1</mn><mo>‾</mo></mover></mrow></math></span>] via a Au-catalyzed vapor-liquid-solid (VLS) growth mechanism. The in-situ formation of a thin porous GaN interlayer on LiGaO₂ effectively mitigated thermal decomposition of the substrate during high-temperature growth. Additionally, the inherent properties of GaN, such as high thermal conductivity, high breakdown field, and excellent electrical conductivity, offer significant potential for enhancing the performance and expanding the functional applications of ZnGa₂O₄-based devices. The morphology, microstructure, growth mechanism, and optical properties of the as-synthesized ZnGa₂O₄ nanowire arrays were systematically analyzed using X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), and photoluminescence (PL). The approach presented here enables the epitaxial integration of well-interconnected ZnGa₂O₄ nanowire arrays, with the GaN buffer layer facilitating continuous conductive pathways between individual nanowires. The photoelectronic properties of the ZnGa₂O₄ photodetector were also evaluated, and the device fabricated using this nanowire array architecture exhibited a rapid transient response and high photocurrent density. These results suggest that the unique structural configuration of the ZnGa₂O₄ nanowire arrays holds promising potential for ultraviolet photodetection and other optoelectronic applications.</div></div>","PeriodicalId":23559,"journal":{"name":"Vacuum","volume":"246 ","pages":"Article 115066"},"PeriodicalIF":3.9,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145927247","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A clean and efficient method of crude tin refining: vacuum distillation harmless treatment of lead, antimony and arsenic","authors":"Wei Chen ,&nbsp;Shutong Wang ,&nbsp;Yuanyang Jing ,&nbsp;Bin Yang ,&nbsp;Lingxin Kong ,&nbsp;Hanqing Yang","doi":"10.1016/j.vacuum.2025.115051","DOIUrl":"10.1016/j.vacuum.2025.115051","url":null,"abstract":"<div><div>In response to crude tin containing high levels of hazardous waste, this study proposes the use of vacuum metallurgy to eliminate Pb, Sb, and As impurities in tin by leveraging the difference in vapor pressure to prevent secondary contamination of these hazardous waste elements. Theoretical calculations of vapor pressure, separation coefficients, and phase diagrams were followed by lab and industrial trials. Lab tests determined optimal conditions: vacuum ≤10 Pa, temperature 1550K, holding time 180 min. Under these conditions, residual Sb (0.00023 %) and Pb (0.0018 %) met China's GB/T 728–2020 Sn99.95 AA tin standard. Industrial trials used a multi-stage continuous vacuum furnace with an As condensation system. Results showed vacuum distillation effectively produced 3N-grade refined tin (Pb, Sb, As compliant), a Sn-Pb-Sb alloy (∼1 % Sn), and a crude As alloy (∼85 % As). The Sn direct yield reached 92.72 % and increased by 6.15 %. The traditional aluminum addition and antimony removal and crystallization lead removal processes have been eliminated, eliminating hazardous wastes such as aluminum-arsenic slag and copper slag, offering significant simpler equipment and environmental benefits. This study provides novel green refining technology for crude tin, supporting sustainable development in tin metallurgy.</div></div>","PeriodicalId":23559,"journal":{"name":"Vacuum","volume":"246 ","pages":"Article 115051"},"PeriodicalIF":3.9,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145841999","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Design and fabrication of a large area ion beam facility using a low aspect ratio electron cyclotron resonance plasma source with a magnetic nozzle configuration","authors":"Xiangyu Niu ,&nbsp;Guanlai Pan ,&nbsp;Zebao Duan ,&nbsp;Xiao Zhang","doi":"10.1016/j.vacuum.2025.115014","DOIUrl":"10.1016/j.vacuum.2025.115014","url":null,"abstract":"<div><div>Generating large area and uniform ion beams remains a significant challenge for conventional ion sources. To address this issue, we develop a compact electron cyclotron resonance plasma source with a low aspect ratio design. By overcoming the geometric constraint associated with the microwave cutoff dimension, the system achieves efficient microwave coupling and stable discharge within a reaction chamber of approximately 49 mm. In addition, a divergent magnetic nozzle is incorporated, and its magnetic field configuration affects the ion acceleration process beyond the source region. Combining the compact source with a low aspect ratio and a magnetic nozzle increases the radial energy uniformity of the downstream ion beam to nearly five times that of the discharge chamber. Based on this improvement, multiple compact sources can be arranged in a modular cascading configuration, providing a scalable approach for generating large area ion beams.</div></div>","PeriodicalId":23559,"journal":{"name":"Vacuum","volume":"246 ","pages":"Article 115014"},"PeriodicalIF":3.9,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145842097","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Prestrike characteristics and mechanism of double-break vacuum circuit breakers under high-frequency capacitive inrush current","authors":"Jing Yan ,&nbsp;Yun Geng ,&nbsp;Hannan Shan ,&nbsp;Yiwen Chen ,&nbsp;Yingsan Geng ,&nbsp;Zhiyuan Liu","doi":"10.1016/j.vacuum.2025.115048","DOIUrl":"10.1016/j.vacuum.2025.115048","url":null,"abstract":"<div><div>This paper presents a systematic experimental investigation into the prestrike phenomena and underlying mechanisms in double-break vacuum circuit breakers during capacitive switching operations. The study focuses on the prestrike characteristics under high-frequency inrush currents of 5 kA and 20 kA. It innovatively elucidates the influence of inrush current amplitude on key parameters, including the prestrike gap length, electric field strength, inrush current chopping behavior, arcing time, and field emission properties of the contacts. Experimental results demonstrate that a high-amplitude inrush current (20 kA) significantly increases the prestrike gap length (with the <em>d</em>_<em>90</em> value increasing by approximately 2 mm) and reduces its dispersion (by up to 40 %) compared to the 5 kA condition. Furthermore, this condition reduces the frequency of inrush current chopping but prolongs the arcing time. Additionally, the high-energy inrush current leads to a notable increase in the field enhancement factor of the contact surfaces, indicating more severe surface degradation. This research provides crucial experimental evidence and theoretical support for the optimized design and engineering application of double-break vacuum circuit breakers in phase-controlled switching.</div></div>","PeriodicalId":23559,"journal":{"name":"Vacuum","volume":"246 ","pages":"Article 115048"},"PeriodicalIF":3.9,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145842100","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of joining parameters on mechanical properties of TLP bonded K416B/GH4648 joint reinforced by BCC and γ′ phases","authors":"Mingze Ran ,&nbsp;Faming Shen ,&nbsp;Xin Zheng ,&nbsp;Zenghui Cai ,&nbsp;Yi Zheng ,&nbsp;Boyu Zhang ,&nbsp;Wei Ke ,&nbsp;Jia Xie ,&nbsp;Deshui Yu ,&nbsp;Bo Zhang ,&nbsp;Qing Chang ,&nbsp;Zhan Sun ,&nbsp;Lixia Zhang","doi":"10.1016/j.vacuum.2026.115075","DOIUrl":"10.1016/j.vacuum.2026.115075","url":null,"abstract":"<div><div>In order to address the issues of low seam strength in nickel-based TLP joints, a new Fe-Co-Ni-Al-B multi-component alloy filler was designed. The microstructure of the filler and the microstructure and mechanical properties of TLP joints of GH4648 and K416B using Fe₇(CoNi)₆₃Al₁₄B₁₆ filler were investigated. Furthermore the effects of joining parameters on the microstructure and mechanical properties of the joint were discussed. The results show that the Fe₇(CoNi)₆₃Al₁₄B₁₆ multi-component alloy filler exhibits a dual-phase microstructure consisting of FCC and BCC phases. Precipitated phases within the seam primarily consisted of the matrix FCC phase, BCC phase, M₂₃B₆, Cr-Mo-W boride, and γ′-(Ni, Co)₃Al precipitates on the matrix FCC phase. At a holding temperature of 1160 °C for 120 min, the maximum shear strength of the joint at room temperature and 900 °C is 705 MPa and 380 MPa, respectively. The joints exhibit mixed-mode fracture behavior, characterized by both transcrystalline and intergranular features. The maximum differences in hardness and elastic modulus between the bonding seam and the DAZ are 28.77 GPa and 0.37 GPa, respectively. The microhardness and elastic modulus values of the joint were evenly distributed. This work provides a new idea for the TLP bonding of dissimilar superalloys utilized in the manufacturing of aero-engine turbine guide.</div></div>","PeriodicalId":23559,"journal":{"name":"Vacuum","volume":"246 ","pages":"Article 115075"},"PeriodicalIF":3.9,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145977652","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"First-principles study of efficient solid-state hydrogen storage materials XSc3H8 (X = Rb and Cs)","authors":"Ziyan Dai ,&nbsp;Saifei Wang ,&nbsp;Xueli Xiang ,&nbsp;Yan Chen ,&nbsp;Shanjun Chen ,&nbsp;Weibin Zhang","doi":"10.1016/j.vacuum.2026.115088","DOIUrl":"10.1016/j.vacuum.2026.115088","url":null,"abstract":"<div><div>The structural, mechanical, hydrogen storage, optical, electronic, dynamic, and thermodynamic characteristics of XSc₃H₈ (X = Rb and Cs) compounds are investigated via first-principles calculations. The negative formation energies of RbSc₃H₈ (−0.55 eV/atom) and CsSc₃H₈ (−0.46 eV/atom) confirm their thermodynamic stability. The absence of imaginary frequencies in the phonon spectra verifies the dynamic stability of both compounds. The mechanical stability of RbSc₃H₈ and CsSc₃H₈ is validated by the elastic constants that meet the Born stability criteria. RbSc₃H₈ and CsSc₃H₈ exhibit gravimetric hydrogen storage capacities of 3.53 wt% and 2.92 wt%, respectively. The hydrogen desorption temperatures are 402.80 K for RbSc₃H₈ and 339.01 K for CsSc₃H₈, which are suitable for H₂ desorption. The mechanical properties indicate that RbSc₃H₈ exhibits brittle characteristics, whereas CsSc₃H₈ displays ductility, and both materials exhibit anisotropic characteristics. The analysis of electronic band structures reveals that these hydrides display metallic properties. Their optical characteristics indicate that they are materials with high polarizability. Our research suggests that RbSc₃H₈ exhibits greater potential as a hydrogen storage material due to its superior gravimetric hydrogen storage capacity, making it particularly suitable for weight-sensitive applications such as mobile hydrogen storage. While CsSc₃H₈ offers advantages in low-temperature applications owing to its lower desorption temperature.</div></div>","PeriodicalId":23559,"journal":{"name":"Vacuum","volume":"246 ","pages":"Article 115088"},"PeriodicalIF":3.9,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145977728","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}