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Influence of Bath Composition on Magnetic Properties of Electrodeposited Co-Pt-W Thin Films

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Journal of Iron and Steel Research International 2007年第4期14卷 65-68页

作者： ge hong-liang WEI Guo-ying WU Qiong ZHOU Qiao-ying WANG Xin-yan College of Material Science and Engineering China Jiliang University Hangzhou 310018 Zhejiang China

Effect of bath composition （[Co^2＋]/[-Pt^Ⅳ ] and [-WO4^2- ], [cit^-]） and pH on the magnetic properties of electrodeposited Co-Pt-W thin films has been investigated. Electrodeposited Co-Pt-W thin films exhibited strong perpendicular magnetic anisotropy when the ratio of [-Co^2＋ ] to [-Pt^Ⅳ ] was 10 ; cathode current efficiency and perpendicular magnetic anisotropy showed little variations when [WO4^2- ] was lower than 0. 1 mol/L, but perpendicular magnetic anisotropy had strengthened when [WO4^2-] was over 0. 1 mol/L, which could be explained by the fact that the hydrogen evolution could produce pores as magnetic domain pinnings; citrate as complexing reagent can promote the polarization of [Co^2＋] and [Pt^Ⅳ]. As a result, the equilibrium electrode potentials of cobalt and platinum moved to negative direction, which led to the co-deposition of Co, Pt, and W. It was also found out that the as-deposited Co- Pt-W hard magnetic thin films were very homogeneous, smooth, and had the maximum coercivity for the bath pH 8. 5 and the concentration of citrate 0. 26 mol/L.

关键词： electrodeposition Co-Pt-W thin film magnetic property bath composition

Overcoming Decomposition with Order-Reversed Quenching Obtained by Flash Melting

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Chinese Physics Letters 2013年第7期30卷 240-242页

作者： SI Ping-Zhan XIAO Xiao-Fei FENG He YU Sen-Jiang ge hong-liang Zhejiang Key Lab of Magnetic Materials China Jiliang UniversityHangzhou 310018

We report on an order-reversed quenching phenomenon in manganese nitrides under flash melting,which prevents the thermodynamically favorable phase transformations from occurring at high temperatures by providing a narrow window of *** Mn-N kept un-decomposed at high temperatures generated by current up to 339 MA/m^(2) within 60 *** flash melting,the Mn-N shows a significantly enhanced coercivity and a decreased crystalline *** Mn-N samples decompose rapidly at temperatures above 1100 K with *** order-reversed quenching technique is potentially useful in processing and preventing phase transformations of meta-stable materials at high temperatures.

关键词： flash Flash reversed

Semiconductor-Like Properties of Sputtered FexCul-x Thin Films

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Chinese Physics Letters 1999年第1期16卷 41-43页

作者： ge hong-liang SHA Jian WANG Zhuang-bing FENG Chun-mu JIAO Zheng-kuan Department of Physics Zhejiang UniversityHangzhou 310027 Physics Division China Institute of MetrologyHangzhou 310034

Amorphous FexCul-x thin films with x ranging from 0.21 to 0.81 have been obtained by rf-magnetron *** structure and the electric transport properties of the films can be controlled by both the composition and annealing *** resistances of the films decrease with the temperature increasing from 12 to 300K,which is the typical semiconductor *** annealing at 400°C for 5h,the amorphous FexCul-x thin film is crystallized and exhibits electric transport property an normal metal *** dependence of resistance-temperature characteristics of the films on the composition and deposition time is described.

关键词： temperature. resistance annealing

Magnetic Fields Reduce Apoptosis by Suppressing Phase Separation of Tau-441

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Research 2024年第1期2023卷 181-197页

作者： Wen-Juan Lin Wen-Pu Shi Wan-Yi ge liang-liang Chen Wei-hong Guo Peng Shang Da-Chuan Yin Key Laboratory for Space Bioscience and Biotechnology School of Life SciencesNorthwestern Polytechnical University127 Youyixi RoadXi'an 710072ShaanxiPR China

The biological effects of magnetic fields(MFs)have been a controversial ***,in recent years,there has been increasing evidence that MFs do affect biological ***,the physical mechanism remains ***,we show that MFs(16 T)reduce apoptosis in cell lines by inhibiting liquid–liquid phase separation(LLPS)of Tau-441,suggesting that the MF effect on LLPS may be one of the mechanisms for understanding the“mysterious”magnetobiological *** LLPS of Tau-441 occurred in the cytoplasm after induction with *** phase-separated droplets of Tau-441 recruited hexokinase(HK),resulting in a decrease in the amount of free HK in the *** cells,HK and Bax compete to bind to the voltage-dependent anion channel(VDAC I)on the mitochondrial membrane.A decrease in the number of free HK molecules increased the chance of Bax binding to VDAC I,leading to increased Bax-mediated *** the presence of a static MF,LLPS was marked inhibited and HK recruitment was reduced,resulting in an increased probability of HK binding to VDAC I and a decreased probability of Bax binding to VDAC I,thus reducing Bax-mediated *** findings revealed a new physical mechanism for understanding magnetobiological effects from the perspective of *** addition,these results show the potential applications of physical environments,such as MFs in this study,in the treatment of LLPS-related diseases.

关键词： inhibited Apoptosis finding

The High Nitrogen Pressure Synthesis of Manganese Nitride

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Chinese Physics Letters 2012年第12期29卷 228-231页

作者： SI Ping-Zhan JIANG Wei WANG Hai-Xia Zhong Min ge hong-liang CHOI Chul-Jin LEE Jung-Goo School of Materials Science and Engineering China Jiliang UniversityHangzhou 3100182Korea Institute of Materials ScienceChangwonGyeongnam641-831R.Korea

We report on the structural transformation and unique magnetic properties of manganese nitrides prepared by nitriding Mn under N_(2) pressures of up to 25 MPa with varying *** N_(2) pressure not only makes nitridation more efficient at lower temperatures,but also enhances the N-content in the nitride lattices,which were expanded with increasing *** N-rich nitrides,includingε-Mn_(4)N,ζ-Mn6N_(2).58 andη-Mn_(3)N_(2),exhibit unique thermal *** N-richε-phase exhibits much larger coercivity and lower saturation magnetization in comparison with theε-phase prepared under ambient N_(2) *** coercivity of the N-richζ-phase reaches up to 45054 A/m.A saturation magnetization as large as 31 Am^(2)/kg is observed in the N-richη-*** are quite different from the conventional antiferromagneticζ-andη-phase obtained under ambient N_(2) *** ascribe the unconventional magnetic properties of the nitrides to the lattice distortion originating from the N-enrichment.

关键词： transformation magnetization saturation

Laser powder bed fusion of NiTiFe shape memory alloy via premixed powder:microstructural evolution,mechanical and functional properties

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Rare Metals 2024年第5期43卷 2300-2316页

作者： Bo Yuan Jin-Guo ge liang Zhang hong-Jun Chen Long-Sha Wei Yu-Duo Zhou Run-Hua Song Institute of Intelligent Manufacturing Technology Shenzhen PolytechnicShenzhen 518055China School of Mechanical and Electrical Engineering Guilin University of Electronic TechnologyGuilin 541004China Guangdong Advanced Polymer Composite Engineering Technology Research Center Shenzhen Academy of Aerospace TechnologyShenzhen 518057China Jihua Laboratory Testing Center Jihua LaboratoryFoshan 528000China

High-cost pre-alloyed powder is the bottleneck problem that limits the widespread application of additivemanufactured shape memory *** this work,the lowcost ternary NiTiFe shape memory alloy is fabricated by laser powder bed fusion(LPBF)technique via mechanically mixed pre-alloy NiTi powder and varying contents pure Fe powder(1,2,3 wt%).All NiTiFe alloys show a relative density of up to 99.8%by optimizing the LPBF processing *** to the heterogeneous nucleation effect of micron-sized Fe particles,both grain refinement and texture weakening are generated in the NiTiFe alloys,accompanied by the reduction of dislocation *** the room-temperature mechanical properties,the NiTi-3Fe alloy shows the highest microhardness of HV370,but the fracture strength and elongation reduce to1701 MPa and 23%*** evolution of mechanical properties is attributed to the high internal defects,low dislocation density and the incoherent ***,the NiTi-3Fe alloy shows the quasi-linear superelasticity behavior;the superelastic recoverable strain of NiTi-1Fe and NiTi-2Fe decreased with the increase in Fe *** study provided a new-fangled insight for the development of multi-component NiTi-based shape memory alloys by additive manufacturing.

关键词： Additive manufacturing Shape memory alloy Metal matrix composite Microstructure Mechanical properties

Optimized the vanadium electrolyte with sulfate-phosphoric mixed acids to enhance the stable operation at high-temperature

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Frontiers of Chemical Science and Engineering 2024年第2期18卷 13-26页

作者： Ling ge Tao Liu Yimin Zhang hong Liu School of Resource and Environmental Engineering Wuhan University of Science and TechnologyWuhan 430081China State Environmental Protection Key Laboratory of Mineral Metallurgical Resources Utilization and Pollution Control Wuhan University of Science and TechnologyWuhan 430081China Hubei Collaborative Innovation Center for High Efficient Utilization of Vanadium Resources Wuhan University of Science and TechnologyWuhan 430081China Hubei Provincial Engineering Technology Research Center of High Efficient Cleaning Utilization for Shale Vanadium Resource Wuhan University of Science and TechnologyWuhan 430081China School of Resource and Environmental Engineering Wuhan University of TechnologyWuhan 430070China

Herein, the influence of the concentration design and comprehensive performance of the sulfate-phosphoric mixed acid system electrolyte is investigated to realize an electrolyte that maintains high energy density and stable operation at high temperatures. Static stability tests have shown that VOPO4 precipitation occurs only with vanadium(V) electrolyte. The concentration of vanadium ion of 2.0–2.2 mol·L^(–1), phosphoric acid of 0.10–0.15 mol·L^(–1), and sulfuric acid of 2.5–3.0 mol·L^(–1) are suitable for a vanadium redox flow battery in the temperature range from –20 to 50 ℃. The equations for predicting the viscosity and conductivity of electrolytes are obtained by the response surface method. The optimized electrolyte overcomes precipitation generation. It has 2.8 times higher energy density than the non-phosphate electrolyte, and a coulomb efficiency of 94.0% at 50 ℃. The sulfate-phosphoric mixed acid system electrolyte promotes the electrode reaction process, increases the current density, and reduces the resistance. This work systematically optimizes the concentrations of composition of positive and negative vanadium electrolytes with mixed sulfate-phosphoric acid. It provides a basis for the different valence states and comprehensive properties of sulfate-phosphoric mixed acid system vanadium electrolytes under extreme environments, guiding engineering applications.

关键词： all vanadium redox flow battery mixed-acid vanadium electrolyte concentration optimization response surface methodology high-temperature stability

Improved efficiency and stability of inverse perovskite solar cells via passivation cleaning

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Journal of Semiconductors 2024年第10期45卷 74-83页

作者： Kunyang ge Chunjun liang Institute of Optoelectronics Beijing Jiaotong UniversityBeijing 100044China

Amidst the global energy and environmental crisis,the quest for efficient solar energy utilization *** solar cells,with efficiencies over 26%and cost-effective production,are at the forefront of ***,their stability remains a barrier to industrial *** study introduces innovative strategies to enhance the stability of inverted perovskite solar *** bulk and surface passivation,defect density is reduced,followed by a"passivation cleaning"using Apacl amino acid salt and isopropyl alcohol to refine film surface *** X-ray diffraction(XRD),scanning electron microscope(SEM),and atomic force microscopy(AFM),we confirmed that this process effectively neutralizes surface defects and curbs non-radiative recombination,achieving 22.6%efficiency for perovskite solar cells with the composition Cs_(0.15)FA_(0.85)PbI_(3).Crucially,the stability of treated cells in long-term tests has been markedly enhanced,laying groundwork for industrial viability.

关键词： perovskite solar cells stability surface passivation washing process photoelectric conversion efficiency nonradiative recombination

An Analytical Method for Delineating Feasible Region for PV Integration Capacities in Net-zero Distribution Systems Considering Battery Energy Storage System Flexibility

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Journal of Modern Power Systems and Clean Energy 2024年第2期12卷 475-487页

作者： Shida Zhang Shaoyun ge hong Liu Guocheng Hou Chengshan Wang School of Electrical and Information Engineering Tianjin UniversityTianjin 300072China

To provide guidance for photovoltaic(PV)system integration in net-zero distribution systems(DSs),this paper proposes an analytical method for delineating the feasible region for PV integration capacities(PVICs),where the impact of battery energy storage system(BESS)flexibility is ***,we introduce distributionally robust chance constraints on network security and energy/carbon net-zero requirements,which form the upper and lower bounds of the feasible ***,the formulation and solution of the feasible region is *** resulting analytical expression is a set of linear inequalities,illustrating that the feasible region is a polyhedron in a high-dimensional space.A procedure is designed to verify and adjust the feasible region,ensuring that it satisfies network loss constraints under alternating current(AC)power *** studies on the 4-bus system,the IEEE 33-bus system,and the IEEE 123-bus system verify the effectiveness of the proposed *** is demonstrated that the proposed method fully captures the spatio-temporal coupling relationship among PVs,loads,and BESSs,while also quantifying the impact of this relationship on the boundaries of the feasible region.

关键词： Net-zero distribution system photovoltaic(PV)integration capacity feasible region battery energy storage system(BESS).