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Magnetic Properties and Workability of 6.5% Si Steel Sheet Manufactured by Siliconizing Process 认领 引用 被引量：4
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作者 Koichiro Fujita, Misao Namikawa and Yoshikazu Takada 《Journal of Materials Science & Technology》 SCIE EI CAS 2000年第2期137-140,共4页
A siliconizing process to manufacture 6.5% Si steel sheet has been developed. Electric components, such as transformers and reactors are made easily from 6.5% Si steel sheet. However, improved workability is desirable... A siliconizing process to manufacture 6.5% Si steel sheet has been developed. Electric components, such as transformers and reactors are made easily from 6.5% Si steel sheet. However, improved workability is desirable to increase the applications. Therefore the improvement of workability of 6.5% Si steel sheet was investigated, and the results were obtained as follows: (a) workability of 6.5% Si steel sheet is deteriorated by grain boundary oxidization, (b) grain boundary oxidization can be restrained by the addition of C. Workability and magnetic properties of 6.5% Si steel sheet with C addition are discussed. Furthermore, it was found that the workability of high Si steel sheet was improved remarkably by varying the Si content gradient along the thickness without deterioration of high frequency magnetic properties. This newly developed magnetic gradient high Si steel sheet is also discussed. 展开更多
关键词 Si Steel Sheet Manufactured by Siliconizing Process Magnetic Properties and Workability of 6.5 St
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Prelithiation of silicon encapsulated in MOF-derived carbon/ZnO framework for high-performance lithium-ion battery 认领 引用 被引量：2
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作者 Congcong Liu Yang Yang +6 位作者 Yu Yao Tao Dai Shitan Xu Shoumeng Yang Ghulam Ali Xianhong Rui Yan Yu 《Nano Materials Science》 EI CAS CSCD 2026年第2期298-306,共9页
Silicon possesses a high theoretical capacity,making it a potential contender for lithium-ion battery(LIB)anodes.Nonetheless,its practical usage is challenged by low electrical conductivity and significant volume expa... Silicon possesses a high theoretical capacity,making it a potential contender for lithium-ion battery(LIB)anodes.Nonetheless,its practical usage is challenged by low electrical conductivity and significant volume expansion during cycling.Here,we synthesized a novel silicon/carbon(Si/C)anode doped with ZnO via a template-derived method and high-temperature carbonization.The carbon structure,originated from metal-organic frameworks(MOFs)and ZnO doping,substantially enhanced the electrochemical properties of the composite material.It exhibited an initial capacity of 2100.3 mA h g-1at a current density of 0.2 A g-1and demonstrated excellent capacity retention over successive cycles.Moreover,the composite material displayed superior rate performance at higher current densities of 2 A g-1and 3 A g-1.To address the low initial Coulombic efficiency(ICE)of siliconbased materials,we adopted a direct contact prelithiation approach and optimized the lithiation process by controlling the prelithiation time.After 30 min of prelithiation,the ICE reached 97.9%,thereby reducing the initial irreversible capacity loss(ICL)and realizing stable discharge-charge in subsequent cycles.This rational design provides valuable insights for achieving high-performance silicon anode. 展开更多
关键词 Metal-organic frameworks Silicon ZnO Prelithiation Lithium-ion batteries
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A sustainable and high value-added strategy under lignite and waste silicon powder to construct SiC nanowires for electromagnetic wave absorption 认领 引用 被引量：1
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作者 Wenhao Wang Xiaolin Lan +6 位作者 Haoquan Hao Jingxiang Liu Yong Shuai Qinghe Jing Shouqing Yan Jie Guo Zhijiang Wang 《International Journal of Minerals,Metallurgy and Materials》 SCIE EI CAS CSCD 2026年第1期347-356,共10页
The electromagnetic wave absorption of silicon carbide nanowires is improved by their uniform and diverse cross-structures.This study introduces a sustainable and high value-added method for synthesizing silicon carbi... The electromagnetic wave absorption of silicon carbide nanowires is improved by their uniform and diverse cross-structures.This study introduces a sustainable and high value-added method for synthesizing silicon carbide nanowires using lignite and waste silicon powder as raw materials through carbothermal reduction.The staggered structure of nanowires promotes the creation of interfacial polarization,impedance matching,and multiple loss mechanisms,leading to enhanced electromagnetic absorption performance.The silicon carbide nanowires demonstrate outstanding electromagnetic absorption capabilities with the minimum reflection loss of-48.09 d B at10.08 GHz and an effective absorption bandwidth(the reflection loss less than-10 d B)ranging from 8.54 to 16.68 GHz with a thickness of 2.17 mm.This research presents an innovative approach for utilizing solid waste in an environmentally friendly manner to produce broadband silicon carbide composite absorbers. 展开更多
关键词 lignite waste silicon powder SiC nanowires electromagnetic wave absorption high value-added
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Ablation behavior of Hf-Zr-modified silicon-based ceramic coatings prepared by polymer derived ceramics and gaseous silicon infiltration 认领 引用 被引量：1
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作者 Lingxiang GUO Yaojun DONG +4 位作者 Yuqi WANG Shiwei HUANG Laura FELDMANN Ralf RIEDEL Jia SUN 《Chinese Journal of Aeronautics》 SCIE EI CAS CSCD 2026年第5期561-573,共13页
To improve the ablation resistance of C/C composite at temperatures exceeding 2000℃,a(Hf-Zr)C-SiC Ultra-High Temperature Ceramic(UHTC)coating was prepared by Polymer Derived Ceramics(PDCs)and Gaseous Silicon Infiltra... To improve the ablation resistance of C/C composite at temperatures exceeding 2000℃,a(Hf-Zr)C-SiC Ultra-High Temperature Ceramic(UHTC)coating was prepared by Polymer Derived Ceramics(PDCs)and Gaseous Silicon Infiltration(GSI).The linear ablation rate of the coated C/C composites was as low as 0.27μm/s,maintaining a level as low as 10-4mm/s.This low Rl is attributed to the formation of a well-bonded double-layered oxide scale with high thermal stability,consisting of an exterior SiO2glass layer and an interior Hf-Zr-Si-O complex oxide layer.Meanwhile,the dissipation of the residual Si and the C phases relieves heat accumulation,ensuring that the recorded surface temperature remains below 2000℃,thereby enhancing the ablation resistance.Additionally,a cyclic evolution of linear ablation rate was found,due to the alternating dominant role of oxidation and mechanical denudation on the coating during ablation.This study provides theoretical and experimental support for the long-term anti-ablation design of highly dense UHTC coatings. 展开更多
关键词 Ablation resistance C/C composites Gaseous silicon infiltration Multi-component carbide Polymer derived ceramics
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Silicon photonic microring-based eight-channel wavelength-division multiplexing transceiver for high-density optical interconnects 认领 引用 被引量：1
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作者 Shenlei Bao Chao Cheng +6 位作者 Xianglin Bu Houyou Lai Xishan Yu Jianjun Zhou Jintao Xue Wenfu Zhang Binhao Wang 《Advanced Photonics Nexus》 CSCD 2026年第3期82-96,共15页
We demonstrate a fully integrated eight-channel dense wavelength-division multiplexing silicon photonic transceiver supporting 200-Gbps per-channel PAM4 operation,enabling a total chip-to-chip data rate of 1.6 Tbps.Th... We demonstrate a fully integrated eight-channel dense wavelength-division multiplexing silicon photonic transceiver supporting 200-Gbps per-channel PAM4 operation,enabling a total chip-to-chip data rate of 1.6 Tbps.The transmitter employs compact single-bus microring modulators,whereas the receiver adopts a polarization diversity architecture based on cascaded dual-ring filters and integrates a bidirectionally incident photodetector,maintaining stable performance under arbitrary input polarization.A unified multichannel thermo-optic feedback architecture is implemented at both the transmitter and receiver,enabling cooperative link-level wavelength alignment without pre-calibration.This multi-channel parallel control scheme reduces wavelength locking time by~30×while achieving fine wavelength-tracking accuracy of 2.74 pm with negligible thermal overhead.Comprehensive device-and system-level experiments validate the robustness and scalability of the proposed architecture.We uniquely address the critical bottlenecks of high polarization sensitivity and latency in wavelength alignment through a highly integrated silicon photonic architecture.By implementing polarization-splitting grating couplers and synchronized wavelengthlocking schemes,we provide a transformative solution for high-density co-packaged optics.Our approach significantly reduces system footprint,enhances operational reliability,and improves power efficiency,thereby bridging the gap between laboratory demonstrations and practical 1.6-Tbps scale chip-to-chip interconnects. 展开更多
关键词 silicon photonics optical interconnects co-packaged optics optical input/output micro-ring modulators silicongermanium photodiodes wavelength-division multiplexing wavelength stabilization thermal control
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Terrestrial biogeochemical silicon cycle in tropical regions:A review 认领 引用
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作者 Haozhe ZHANG Jinling YANG +2 位作者 Yueqi SUN Xiaodong SONG Ganlin ZHANG 《Pedosphere》 SCIE CAS CSCD 2026年第1期39-57,共19页
Intense chemical weathering in tropical regions produces soils characterized by silicon(Si)depletion and iron and aluminum oxide accumulation,leading to soil degradation.Consequently,Si cycling is of paramount importa... Intense chemical weathering in tropical regions produces soils characterized by silicon(Si)depletion and iron and aluminum oxide accumulation,leading to soil degradation.Consequently,Si cycling is of paramount importance in tropical regions.This review summarizes the key processes of the terrestrial Si biogeochemical cycle in tropical areas and underscores its biogeochemical significance in ecosystems.Runoff outputs constitute the dominant mechanism of Si depletion in tropical soils.However,the combined effects of dissolved Si(DSi)retention by highly weathered soil and Si uptake by vegetation attenuate desilication rates in these ecosystems.Tropical soils exhibit limited quantities of weatherable minerals,resulting in soil solution with low concentrations of DSi.Consequently,the primary sources of available Si are atmospheric dust inputs from distant sources and biogenic silica originating from plants.Irrigation,application of Si fertilizers,crop harvesting,and corresponding Si exports significantly impact soil Si cycling within agroecosystems.Therefore,soil Si cycling in tropical regions is different from that in other climatic zones.However,there are still many knowledge gaps within contemporary research.We propose to delve into several perspectives,including the exploration of the processes,fluxes,rates,related factors,and mechanisms associated with Si cycling in tropical regions.Comprehensive research from these perspectives would significantly enhance the understanding of pedogenesis and soil evolution and provide valuable insights for guiding the sustainable management of tropical soils. 展开更多
关键词 desilicification-allitization dissolved silicon pedogenesis phytolith silicon pool soil evolution
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Effect of Si content on microstructure and properties of ultra-thin non-oriented silicon steel ribbons prepared with planar flow casting 认领 引用
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作者 Yuan-Yao Cheng Si-Qian Bao +7 位作者 De-Ming Xu Shou-Hu Zu Jia-Rui Hu Yu-Xin Liu Chen Liu Jia-Qi Chang Xi-An Fan Geng-Wei Yang 《Journal of Iron and Steel Research International》 SCIE EI CSCD 2026年第2期148-160,共13页
With the development of electronic components towards high frequency,high efficiency,and miniaturization,the demand for non-oriented silicon steel ultra-thin ribbons is increasing,which were usually prepared by multi-... With the development of electronic components towards high frequency,high efficiency,and miniaturization,the demand for non-oriented silicon steel ultra-thin ribbons is increasing,which were usually prepared by multi-pass rolling with complex processes and high cost.The ultra-thin non-oriented silicon steel ribbons with silicon content of 2–4.5 wt.%Si were prepared with the planar flow casting technology,and the microstructure and properties of ribbons were investigated.The results showed that as the silicon content increased,the grain size of the as-cast ribbons gradually decreased,and the dislocation density and internal stress were higher.The proportion of{100}oriented grains gradually increased from 29.3 to 37.3%,and the ratio of{110}and{111}oriented grains decreased.Meanwhile,the magnetic induction B50 showed a decline trend from 1.62 to 1.45 T with the increase in silicon content,while the iron loss P1.0/400 increased from 20.61 to 66.65 W/kg.This may be related to the silicon content affecting the wettability of melt and the wheel,thereby affecting the cooling capacity.The grains grew significantly after annealing,the internal stress was released and dislocations were eliminated.All this greatly improved the magnetic properties and decreased the hardness.B50 of ribbons with 2 wt.%Si reached 1.66 T and P1.0/400 of ribbons with 4.5 wt.%Si was reduced to 13.40 W/kg.The percentage of{110}fiber grains increased obviously while{100}fiber grains decreased slightly after heat treatment. 展开更多
关键词 Planar flow casting Silicon Non-oriented silicon steel Ultra-thin ribbon Magnetic property
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Ridge waveguide SiGe/Si phototransistor with high responsivity 认领 引用
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作者 Xie Hong-Yun Xu Zi-Mai +5 位作者 Jiao Wei-Zhao Ma Yu-Dong Liu Zi-Ming Chen Liang Na Wei-Cong Zhang Wan-Rong 《红外与毫米波学报》 SCIE EI CAS CSCD 北大核心 2026年第3期491-499,共9页
Silicon-based phototransistor detectors,offering advantages such as high internal gain,cost-effective and compatibility with CMOS technology,are becoming one of the key devices for large-scale photon integration chip ... Silicon-based phototransistor detectors,offering advantages such as high internal gain,cost-effective and compatibility with CMOS technology,are becoming one of the key devices for large-scale photon integration chip and have significant potential for applications in short-distance optical interconnecting.To relieve its inherent optimization contradiction between responsivity and bandwidth performance,a novel couple ridge waveguide SiGe/Si phototransistor was proposed,in which the carrier transport and the photon propagation were perpendicu⁃lar and demonstrate the independent optimization on absorption efficiency and operating speed.The optical propa⁃gation mode in the SiGe/Si ridge waveguide were analyzed between the single mode and the multiple mode.The geometric parameters of the ridge waveguide to achieve high absorption efficiency were optimized.The ridge waveguide SiGe/Si phototransistor were fabricated using technology compatible with CMOS process platform and achieved a responsivity of 6.4 A/W with the dark current of 10 nA. 展开更多
关键词 phototransistor high responsivity ridge waveguide photodetector silicon photonics
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Large-scale integrated photonic accelerators for ultralow-latency and universal AI computing 认领 引用
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作者 Xiangyan Meng Junshen Li +4 位作者 Kangwei Fei Yu Wang Wei Li Nuannuan Shi Ming Li 《Journal of Semiconductors》 EI CAS CSCD 2026年第6期12-15,共4页
Integrated silicon photonics has emerged as a transformative technology for post-Moore’s law computing,offering intrinsic advantages of high bandwidth,ultralow latency and low energy consumption that far exceed tradi... Integrated silicon photonics has emerged as a transformative technology for post-Moore’s law computing,offering intrinsic advantages of high bandwidth,ultralow latency and low energy consumption that far exceed traditional electronic computing architectures[1−4].As artificial intelligence(AI)models continue to grow in complexity and scale,the demand for high-speed,energy-efficient computing has spurred intensive research into photonic computing as a promising alternative to electronic accelerators[5−7].Matrix multiply−accumulate(MAC)operations,the core of deep learning and combinatorial optimization algorithms,are particularly amenable to photonic implementation,as light enables parallel multiplication and accumulation with minimal data movement[8,9].However,the practical application of photonic computing has long been hindered by critical challenges including large-scale integration of photonic components,electro-optical co-packaging,guaranteed computation accuracy of analog photonic systems,and compatibility with mainstream AI models and algorithms[10,11]. 展开更多
关键词 photonic computing integrated silicon photonics electronic computing ultralow latency matrix multiply accumulate analog photonic systems silicon photonics electronic accelerators matrix
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Enhanced performance and flexibility of perovskite/silicon tandem solar cells via uniform submicron pyramids 认领 引用
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作者 Qi Liu Junjun Li +9 位作者 Fei Wang Shuangbiao Xia Yuhui Ji Yutao Wang Yunren Luo Jian Yu Fanying Meng Liping Zhang Zhengxin Liu Wenzhu Liu 《ENGINEERING Energy》 SCIE EI CAS CSCD 2026年第3期101-109,共9页
The interfacial stress between silicon bottom cell and perovskite top cell remains a critical challenge for flexible perovskite/silicon tandem solar cells,leading to interfacial delamination and device degradation.In ... The interfacial stress between silicon bottom cell and perovskite top cell remains a critical challenge for flexible perovskite/silicon tandem solar cells,leading to interfacial delamination and device degradation.In this work,the effect of the thickness and pyramid size on mechanical properties of silicon wafers are investigated,demonstrating that thinner wafers and smaller pyramids significantly enhance the flexural strength of thin silicon wafers by mitigating stress concentration effects.Based on these findings,a synergistic optimization strategy is proposed that employs precise wet-etching control to fabricate small-sized,high-density,uniform pyramids on 55μm silicon wafers for efficient and flexible perovskite/silicon tandem solar cells.By optimizing the texturing duration,this approach simultaneously enhances the minority carrier lifetime(τ)and achieves an excellent implied open-circuit voltage(iVoc).Furthermore,the uniform submicron-scale pyramid structure promotes high-quality perovskite film formation and improves interfacial contact properties.As a proof of concept,monolithic flexible perovskite/silicon tandem devices fabricated on such uniformly textured pyramids delivered a power conversion efficiency(PCE)of 30.04%.These devices promise for low-cost,lightweight and flexible photovoltaic applications. 展开更多
关键词 submicron pyramids uniform perovskites silicon flexible tandem solar cells
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Inclusions and phases in Fe-RE-Si steelmaking alloys and their effect on evolution of inclusions in non-oriented silicon steels 认领 引用
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作者 Xiangyu Li Chao Chen +6 位作者 Tao Wang Zhijie Guo Hongyu Wang Haozheng Wang Liqiang Xue Jun Tian Yanhui Sun 《Journal of Rare Earths》 SCIE EI CAS CSCD 2026年第1期377-387,共11页
The magnetic properties of non-oriented silicon steel are affected by the composition and morphology of inclusions in the steel.It is necessary to minimize the number of inclusions and modify the inclusions during the... The magnetic properties of non-oriented silicon steel are affected by the composition and morphology of inclusions in the steel.It is necessary to minimize the number of inclusions and modify the inclusions during the manufacturing process.Rare earth modification of the non-oriented silicon steel is a common practice in steelmaking industry.At present,there is still insufficient research on the properties of rare earth alloys themselves,such as phase composition,inclusions in alloys,and the influence of alloy impurities on inclusions in non-oriented silicon steel.In this paper,the phase composition of Fe-RE-Si alloy was analyzed by X-ray diffraction(XRD)and electron probe microanalysis(EPMA).The inclusions in Fe-RE-Si alloy were analyzed by electrolytic extraction and scanning electron microscopy-energy dispersive spectroscopy(SEM-EDS)methods.Subsequently,non-oriented silicon steel was melted in a high-temperature tubular resistance furnace and the Fe-RE-Si alloy was added for rare earth treatment.The evolution of inclusions in silicon steel after Fe-RE-Si alloy treatment was studied by thermodynamic calculation and SEM-EDS analysis.The results demonstrate that the Fe-RE-Si alloy is made up of two phases,i.e.,the Fe-Si phase and the Ce-Si phase.The inclusions in the alloy are predominately Al-Fe intermetallic compounds and oxide inclusions.The effect of the Fe-RE-Si alloy on the size,morphology and composition of inclusions in non-oriented silicon steel was investigated through high-temperature melting experiments and thermodynamic calculations.The results of experiments show that after treatment with Fe-RE-Si alloy,the rare earth inclusions in non-oriented silicon steel are mainly AlN-RE2O2S composite inclusions,a small amount of AlN-RES and AlN-REAlO3 composite inclusions.The modification sequence of rare earth inclusions in heat A(with a rare earth content of 0.0017 wt%)is as follows:RES/RE2O2S→RE2O2S/REAlO3.Besides,the modification sequence in heat B(with a rare earth content of 0.0119 wt%)is as follows:RE2O3/RE2O2S→RES/RE2O2S.When the rare earth content increases from 0.0017 wt%to 0.0119 wt%,the type of rare earth inclusions changes from RE2O2S/REAlO3 to RES/RE2O2S.The average size of inclusions in two heats increases slightly in 30 min after the addition of Fe-RE-Si alloy.The average size of inclusions in heat A and heat B increases from 1.89 to 2.59μm,and from 1.93 to 2.6μm,respectively.The average size of inclusions in the furnace cooling samples of heat A is larger than that of heat B.In both heats,after the addition of Fe-RE-Si alloy,the proportion of inclusions with the size of 0-2μm decreases and the proportion of inclusions with the size of 2-5μm increases.The effect of rare earth elements coarsening inclusions is significant.By calculating Gibbs free energy of the rare earth inclusions and the phase stability diagram,it is found that the thermodynamic stable inclusions in both heats are RE2O2S. 展开更多
关键词 Rare earths Non-oriented silicon steel Fe-RE-Si alloy Thermodynamic calculation Inclusions Deoxidation
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Sub-100 Femtosecond All-Optical Modulation Beyond Electron-Phonon Limits 认领 引用
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作者 Renxian Gao Jiayu Li +6 位作者 Xiaoxiang Dong Yonglin He Wenbin Chen Peiwen Ren Xiaoyu Zhao Ming‑De Li Zhilin Yang 《Nano-Micro Letters》 SCIE EI CAS CSCD 2026年第9期504-515,共12页
Ultrafast all-optical modulators are central to the advancement of next-generation photonic computing and signal-processing systems.However,the intrinsic electron–phonon relaxation bottleneck in plasmonic materials h... Ultrafast all-optical modulators are central to the advancement of next-generation photonic computing and signal-processing systems.However,the intrinsic electron–phonon relaxation bottleneck in plasmonic materials has long constrained modulation speeds to the picosecond regime,hindering the realization of sub-100 fs modulation.Here,we report a metastructured silver–single-crystal silicon nanodisk antenna that delivers experimentally resolved sub-100 fs alloptical modulation.Distinct from conventional planar metal–semiconductor junctions,the nanodisk architecture spatially co-localizes plasmonic energy deposition with the metal–semiconductor transfer boundary within a nanoscale-confined volume.This configuration markedly shortens hot-carrier transport pathways and preferentially activates interfacial carrier extraction during the earliest relaxation stage,thereby establishing an interface-dominated modulation pathway that precedes electron–phonon thermalization.By enabling modulation on timescales comparable to intrinsic electronic response limits,this work establishes a physical foundation for ultrafast photonic modulation,including femtosecond free-space photonic computing architectures,temporal optical gating,and other ultrafast systems constrained by carrier or cavity lifetimes. 展开更多
关键词 Sub 100 fs all Optical modulation Silver Silicon metastructure Interfacial hot Carrier dynamics
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Phosphorus-mediated decoupling of Fe-Si cycling under variable oxygenation:implications for dissolved silicon release from natural sediments 认领 引用
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作者 Lu Huang Chris T.Parsons +2 位作者 Md Abdus Sabur Stephanie Slowinski Philippe Van Cappellen 《ENGINEERING Environment》 SCIE EI CAS CSCD 2026年第6期93-104,共12页
The availability of dissolved silicon(DSi)relative to dissolved phosphorus(DP)regulates the dominance of siliceous phytoplankton in eutrophic waters,yet the redox controls on DSi internal loading from natural sediment... The availability of dissolved silicon(DSi)relative to dissolved phosphorus(DP)regulates the dominance of siliceous phytoplankton in eutrophic waters,yet the redox controls on DSi internal loading from natural sediments remain uncertain.We incubated surficial sediments in ten parallel flow-through columns to disentangle Fe-P-Si interactions under alternating oxic and anoxic overlying waters.Columns containing 10 cm of sediment received anoxic influents with different combinations of Fe(II),DSi,and DP delivered through the bottom port using a peristaltic pump,while the effluent were monitored;post-experiment sediments were characterized using buffered ascorbatecitrate(BAC)and 1 mol/L NaOH extractions.Under oxic conditions,more than 90%of inflow Fe(II)was retained in the upper 1 cm of sediment,enriching BAC-extractable Fe and P by up to 40%relative to initial values.Transition to anoxia caused reductive dissolution of these phases,leading to Fe release of up to 193±26μmol/L and DP peaks of 160±30μmol/L in the overlying water.In contrast,DSi exhibited neither measurable retention during oxia nor systematic increases under anoxia,with effluent concentrations consistently exceeding influent levels by 20%-50%,indicating steady internal production.Mass-balance calculations show that DSi fluxes(20-40μmol/d)were dominated by continuous dissolution of amorphous silica,while elevated DP suppressed Fe-Si co-precipitation via competitive sorption on Fe(III)solids.We conclude that the interplay among porewater DP and DSi production rates,along with the pool of reactive iron,governs the extent to which internal Si release responds to redox variations. 展开更多
关键词 Internal silicon loading Iron-phosphorus-silicon coupling Oxygen conditions Flowthrough column experiment Eutrophication control
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Anisotropic MoS2/SiC Aerogels:A Multifunctional Platform for Broadband Electromagnetic Stealth and Thermal Management 认领 引用
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作者 Zhi Song Longhui He +2 位作者 Fanqi Meng Hui Zhang Lixi Wang 《Rare Metals》 SCIE EI CAS CSCD 2026年第6期454-468,共15页
To address the demand for high‐temperature stability,broadband strong absorption,and multifunctional integration of electromagnetic wave absorbing materials in complex service environments,lightweight molybdenum disu... To address the demand for high‐temperature stability,broadband strong absorption,and multifunctional integration of electromagnetic wave absorbing materials in complex service environments,lightweight molybdenum disulfide(MoS2)decorated silicon carbide(SiC)nanofiber composite aerogels with a directional layered interconnected structure were successfully fabricated in this study via a hydrothermal method combined with directional freeze casting and thermal annealing processes.Microstructurally,the aerogel exhibits a“shish‐kebab‐like”heterostructure formed by MoS2nanosheets uniformly wrapping SiC nanofibers.Furthermore,the heat treatment process regulated the phase transformation of MoS2from the 1T phase to the 2H phase,retaining abundant defect sites.Benefiting from the significant anisotropy induced by the directional pore structure,the material demonstrates optimal impedance matching characteristics and dielectric loss capability when electromagnetic waves are incident parallel to the directional structure.The optimized MoS2@SiC‐2 sample not only possesses an ultralight density(0.157 g cm−3)but also achieves superior microwave absorption performance in the X‐band:a minimum reflection loss(RLmin)of−34.56 dB and an effective absorption bandwidth(EAB)covering the entire X‐band(4.2 GHz).In addition,this unique three‐dimensional directional lamellar structure endows the material with excellent thermal insulation performance,exhibiting a thermal conductivity as low as 0.057 W m−1K−1in the direction perpendicular to the directional structure,along with outstanding fire resistance and thermal shock resistance.Integrating high‐efficiency electromagnetic stealth and thermal protection functions,this MoS2@SiC aerogel provides a novel design strategy for electromagnetic protection applications in harsh environments. 展开更多
关键词 anisotropy freeze casting microwave absorption molybdenum disulfide silicon carbide nanofibers thermal insulation
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A dual capillary contraction-induced prestressing strategy for high-loading Si/C anode with long cycling stability 认领 引用
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作者 Yanpeng Wang Fenghua Liu +6 位作者 Yusheng Luo Zhaoyang Song Zezhong Li Xiaomei Chen Shuang Liu Ke Gong Wei Liu 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2026年第6期287-295,I0008,共9页
Silicon(Si)is a leading anode candidate for high-energy-density lithium-ion batteries due to its exceptional theoretical specific capacity.However,its practical application is hindered by particle fracture under high ... Silicon(Si)is a leading anode candidate for high-energy-density lithium-ion batteries due to its exceptional theoretical specific capacity.However,its practical application is hindered by particle fracture under high areal loadings and the inherent trade-off between electrode density and ion transport kinetics.Herein,we propose a“dual capillary contraction”strategy to construct a dense,structurally robust silicon-based anode(Si@SA@GO).This method uses nano-CaCO3 as a sacrificial filler between graphene oxide(GO)layers,creating a“filled capillary”effect that amplifies contraction forces during initial drying.Subsequent removal of the filler generates nanopores,which then trigger an intense“hyper-contraction”driven by Young-Laplace pressure in a secondary drying stage.This cascaded process forges a pretensioned GO network that tightly confines Si nanoparticles,actively imposing compressive stress to counteract their volumetric expansion.The resulting electrode successfully resolves the conflict between density and structural stability,achieving a remarkable tap density of 0.84 g cm-3,while maintaining efficient ion transport pathways.The Si@SA@GO anode delivers an ultrahigh areal capacity of 8.5 mAh cm-2,with 75%capacity retention after 1000 cycles in the Si@SA@GO//LFP full cell.This work provides a scalable and effective route to resolve the long-standing trade-offs among density,stress,and kinetics in high-performance silicon anodes. 展开更多
关键词 Contraction Silicon anode High density High loading Lithium ion storage
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Effects of Spartina alterniflora invasion on carbon,nitrogen,phosphorus and silicon stoichiometry in coastal saltmarsh wetlands 认领 引用
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作者 Jian Li Zhanrui Leng +2 位作者 Guoyu Luo Longyun Lai Shan Jiang 《Acta Oceanologica Sinica》 SCIE CAS CSCD 2026年第4期91-106,共16页
Spartina alterniflora is one of the most widespread invasive plants globally,with particularly rapid expansion in coastal wetlands of China,posing a severe threat to the structure and function of native ecosystems.Eco... Spartina alterniflora is one of the most widespread invasive plants globally,with particularly rapid expansion in coastal wetlands of China,posing a severe threat to the structure and function of native ecosystems.Ecological stoichiometry serves as a fundamental theoretical framework for understanding its invasion mechanisms and informing ecological restoration,especially regarding its demand for silicon(Si)and interactions with carbon(C),nitrogen(N),and phosphorus(P).In the present study,sediment samples were collected from S.alterniflora habitats(SA),Phragmites australis habitats(PA),and mudflat habitats(MF)to quantify the concentrations and stoichiometric characteristics of various Si,C,N,and P fractions.The results demonstrated that compared to MF and PA,the invasion of S.alterniflora significantly increased the contents of bioavailable silicon(ASi)by 1.3–1.4 times,reaching up to 347.5 mg/kg in 0–40 cm surface sediments.Similarly,total carbon(TC)and total nitrogen(TN)increased by 1.2–1.4 times and 1.5–2.1times,respectively,while total organic carbon(TOC)and dissolved organic carbon(DOC)were elevated by 1.7–3.0times and 1.7–2.2 times in the 0–40 cm sediment layer.In contrast,bioavailable phosphorus(AP)markedly declined,with SA sediments containing only 15%–64%of the AP levels observed in PA and MF habitats across the 0–100 cm sediment.In SA sediments,ASi exhibited a significant positive correlation with C,N,P,and their stoichiometric ratios(C/N,C/P,N/P).These findings indicated that the invasion of S.alterniflora modified sediment physicochemical properties by enhancing Si availability and restructuring the C,N,and P stoichiometric characteristics,thereby creating a sediment condition favorable for its proliferation,and amplifying its ecological invasiveness. 展开更多
关键词 Spartina alterniflora silicon ecological stoichiometry sediment
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Molten Salt Electrolyte Enables Micro-Sized Silicon Anode in Lithium-Ion Batteries 认领 引用
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作者 Wenjian Wang Changyi Zheng +4 位作者 Shengjie Zhang Yao Liu Linjuan Zhang Jianqiang Wang Yonggang Wang 《Energy & Environmental Materials》 SCIE EI CAS CSCD 2026年第1期109-117,共9页
Micro-sized silicon(mSi)anodes offer high capacity for next-generation lithium-ion batteries but suffer from severe volume changes,causing unstable interphases and poor cycling.Traditional electrolytes derive unstable... Micro-sized silicon(mSi)anodes offer high capacity for next-generation lithium-ion batteries but suffer from severe volume changes,causing unstable interphases and poor cycling.Traditional electrolytes derive unstable electrolyte/electrolyte interphases,and flammable solvents pose safety risks.Here,we introduce a non-flammable molten salt electrolyte,which consists of lithium bis(fluorosulfonyl)imide,potassium bis(fluorosulfonyl)amide,and cesium bis(fluorosulfonyl)imide in a mole ratio of 0.3:0.35:0.35(noted as Li0.3K0.35Cs0.35FSA),that forms an inorganic interphase on mSi,stabilizing the electrode/electrolyte interface.Computational and experimental insights elucidate the FSA-anion decomposition-derived SEI predominantly of LiF,Li3N,Li2O,and Li2S,which exhibits mechanical resilience and low interfacial resistance,effectively accommodating the significant volume expansion of silicon during lithiation/delithiation.As a result,the Li||mSi half-cell achieves 60.7%capacity retention after 100 cycles with 99.5%average Coulombic efficiency.Overall,the Li0.3K0.35Cs0.35FSA electrolyte eliminates flammability concerns while enabling robust cycling performance.This work demonstrates a safe,high-energy battery system by coupling mSi anodes with stable molten salt electrolytes,addressing both interfacial instability and safety challenges in mSi-based lithium-ion batteries. 展开更多
关键词 high-energy density interphase engineering lithium-ion batteries microscale/micron silicon molten salt electrolyte
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Preparation of Polyethylene Glycol-Modified Silicone Hydrogel Contact Lenses for Enhanced Sodium Hyaluronate Delivery 认领 引用
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作者 ZHANG Xiaojuan WANG Zhao +7 位作者 ZHOU Yao ZHANG Caiyu LI Yu ZHANG Changqing ZHAO Yuan LIN Qing SONG Wenli LIANG Dong 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS CSCD 2026年第3期846-855,共10页
To address the limitations of traditional silicone hydrogel contact lenses in wettability and drug release,an innovative approach was proposed by incorporating polyethylene glycol(PEG)and sodium hyaluronate(SH)into th... To address the limitations of traditional silicone hydrogel contact lenses in wettability and drug release,an innovative approach was proposed by incorporating polyethylene glycol(PEG)and sodium hyaluronate(SH)into these lenses.Aminoalkyl-terminated polydimethylsiloxane(KF8010)was reacted with glycidyl methacrylate(GMA)to synthesize GKF8010,which was then mixed with methacryloxymethyltris(trimethylsiloxy)silane(TRIS),N,N-Dimethylaniline(DMA),and PEG400 to fabricate PEG-modified silicone hydrogel contact lenses(PEG-SCL)via UV molding.Unmodified lenses(SCL)were served as controls.The effects of PEG modification on lens properties,including water content,wettability,and optical clarity,and SH loading efficiency and drug release were evaluated.Additionally,the protein adsorption and biocompatibility of the lenses with human umbilical vein endothelial cells(HUVECs)were assessed.Results indicated that PEGmodified lenses exhibited superior water content,reduced protein adsorption,enhanced SH loading capacity and controlled release profiles,highlighting their potential for treating dry eye syndrome. 展开更多
关键词 silicone hydrogel contact lenses PEG modification sodium hyaluronate dry eye syndrome
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Chemically interlinked and ionically conductive sulfonated graphene framework enabling fully integrated silicon anodes for highperformance Li-ion batteries 认领 引用
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作者 Yuanyuan Yu Yuanqi Kang +2 位作者 Jiadeng Zhu Junhua Zhang Mengjin Jiang 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2026年第4期951-961,I0022,共11页
Silicon(Si)anodes offer an ultrahigh theoretical capacity but face two major barriers to commercialization:severe structural degradation caused by significant volume changes and sluggish ion transport kinetics due to ... Silicon(Si)anodes offer an ultrahigh theoretical capacity but face two major barriers to commercialization:severe structural degradation caused by significant volume changes and sluggish ion transport kinetics due to the discontinuous ionic conductance of conventional binders.To address these challenges,we develop a fully integrated Si anode using sulfonated graphene(SG)as a dual-functional ion-conductive and mechanical reinforcing framework within a conventional carboxymethyl cellulose/styrene-butadiene rubber(CMC/SBR)binder.Thermally activated reactions during electrode fabrication establish covalent sulfonate ester bonds between SG and CMC,elastic carboxylate crosslinks between SBR and CMC,and chemical anchoring between the binders and Si particles,which are all further reinforced by hydrogen bonding.This multi-bonding network not only dissipates mechanical stress and maintains electronic connectivity via embedded C65 carbon but also significantly enhances Li+transport through high intrinsic ionic conductivity of SG,facilitating the formation of a stable solid electrolyte interphase(SEI).The resulting Si@CMC/SBR/SG anode delivers a high initial capacity of 3513.2 mAh g-1and retains 77%capacity after 500 cycles at 2 A g-1.It achieves 762 mAh g-1at 4 A g-1and practical areal capacities exceeding 4 mAh cm-2.Full-cell tests with NCM811 cathodes confirm 86.2%capacity retention after 100 cycles.This work demonstrates a pragmatic and scalable integration paradigm for durable,high-energy-density Si anodes. 展开更多
关键词 Silicon anodes Sulfonated graphene Integrated electrodes Ionic transport Lithium-ion batteries
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Optimization of CVD SiC process and preparation of high-purity coatings based on a thermodynamic-fluid dynamics coupled model 认领 引用
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作者 XU Zhen-nan CHEN Zhao-ke +6 位作者 SHU Rui XUE Jia-xiang XIE Feng-min-yu WU Zong-xu YANG Rong-kun YANG Zheng-mao XIONG Xiang 《Journal of Central South University》 SCIE EI CAS CSCD 2026年第4期1499-1514,共16页
The mechanism of SiC preparation via chemical vapor deposition(CVD)of the CH3SiCl3(MTS)-H2system remains unclear.This article integrates thermodynamic calculations,fluid dynamics simulations,and experimental ... The mechanism of SiC preparation via chemical vapor deposition(CVD)of the CH3SiCl3(MTS)-H2system remains unclear.This article integrates thermodynamic calculations,fluid dynamics simulations,and experimental validations to enable a synergistic analysis from thermodynamic equilibrium predictions to fluid dynamics-based dynamic modeling.The results systematically reveal the effects of process parameters on the SiC deposition procedure.It was found that the silicon-rich phenomenon observed at low temperatures is related to the low reactivity of CH4and the preferential adsorption of chlorosilanes.With increasing deposition temperature,the concentration of silicon-containing molecular species such as SiCl2rises,while unsaturated hydrocarbons like C2H2become the dominant carbon sources at high temperature,ultimately producing nearly stoichiometric SiC coatings at 1400℃.Notably,thermodynamic calculation results alone exhibited deviations from experimental results,whereas coupling with fluid dynamics simulations,consistency was improved significantly.This research method not only compensates limitations inherent in thermodynamic calculations but also provides reliable theoretical basis and technical support for precise control of CVD parameters and optimization of SiC chemical composition. 展开更多
关键词 chemical vapor deposition silicon carbide thermodynamics fluid dynamics chemical composition
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