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Effects of two silico.e resin co.tings on performance of FeSiAl magnetic powder co.es

Journal of Iron and Steel Research International 2024年第5期31卷 1279-1288页

作者： Jia-qi Liu Zheng-qu Zhu Pu Wang Yi-fan Li Jing Pang Jia-quan Zhang School of Metallurgical and Eco.ogical Engineering University of Science and Technology BeijingBeijing100083China Qingdao Yunlu Advanced Materials technology co. Ltd.Qingdao266232ShandongChina

Two silico. resins with excellent thermal stability,JH1123 and JH7102,are used as the insulated agents and binders for the gas-atomized FeSiAl powder,and co.responding magnetic powder co.es(MPCs)are *** insulation capability and application prospects of the two silico. resins are evaluated by co.paring the magnetic properties of the co.ted powder and *** scanning electron microsco.y,energy dispersive X-ray spectrosco.y and Fourier transform infrared spectrosco.y results show that uniform insulation layers are both formed on the powder ***1123 has stronger binding ability,and the JH1123-co.ted powder exhibits severe agglomeration,with d50(average particle size)approximately twice that of the JH7102-co.ted *** as-prepared MPCs exhibit outstanding soft magnetic ***,the permeability of FeSiAl@JH1123 is up to 74.0,which is 35.5%higher than that of FeSiAl@JH7102 because JH1123 can further improve the density of the *** for FeSiAl@JH7102,it has better direct current bias and lower co.e loss of 716.9 mW cm^(−3) at 20 mT and 1000 kHz due to its lower co.rcivity and greater anti-magnetic saturation ability.A co.prehensive co.parison shows that FeSiAl@JH1123 is suitable for medium and high frequency applications,while FeSiAl@JH7102 is more suitable for high frequency *** indicates that the use of JH1123 and JH7102 silico. resins for binding and insulated co.ting not only simplifies the preparation process of MPCs,but also enables the co.trolled production of MPCs for different applications.

关键词： FeSiAl Insulated co.ting Magnetic powder co.e Permeability co.e loss

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Jet formation and penetration performance of a double-layer charge liner with chemically-deposited tungsten as the inner liner

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Defence technology（防务技术） 2024年第3期33卷 374-385页

作者： Bihui Hong Wenbin Li Yiming Li Zhiwei Guo Binyou Yan Ministerial Key Laboratory of ZNDY Nanjing University of Science and TechnologyNanjing 210094China State Key Laboratory of Explosion science and technology Beijing Institute of TechnologyBeijing 100081China Xiamen Tungsten co. Ltd.Xiamen 361004China

This paper proposes a type of double-layer charge liner fabricated using chemical vapor deposition(CVD)that has tungsten as its inner *** feasibility of this design was evaluated through penetration ***-layer charge liners were fabricated by using CVD to deposit tungsten layers on the inner surfaces of pure T2 co.per *** microstructures of the tungsten layers were analyzed using a scanning electron microsco.e(SEM).The feasibility analysis was carried out by pulsed X-rays,slug-retrieval test and static penetration *** shaped charge jet forming and penetration law of inner tungsten-co.ted double-layer liner were studied by numerical simulation *** results showed that the double-layer liners co.ld form well-shaped *** errors between the X-ray test results and the numerical results were within 11.07%.A slug-retrieval test was found that the retrieved slug was similar to a numerically simulated *** with the traditional pure co.per shaped charge jet,the penetration depth of the double-layer shaped charge liner increased by 11.4% and>10.8% *** summary,the test results are good,and the numerical simulation is in good agreement with the test,which verified the feasibility of using the CVD method to fabricate double-layer charge liners with a high-density and high-strength refractory metal as the inner liner.

关键词： Shaped charge Chemical vapor deposition Tungsten Double-layer charge liner X-ray Penetration

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In situ anchoring in carbon matrix of Bi_(2)O_(2)co.(3) as a high-performance anode material for Li-ion batteries

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Rare Metals 2024年第8期43卷 3634-3646页

作者： Pu-Qiang He Jun Guo Hui Huang Zhong-Cheng Guo Faculty of Metallurgy and Energy Engineering Kunming University of Science and TechnologyKunming 650093China Research Center of Metallurgical Electrode Materials Engineering technology Kunming 650106China Kunming Hendera science and technology co. Ltd.Kunming 650106China

Bismuth-based anode materials have been regarded as promising Li-ion batteries due to their high theoretical ***,their low co.ductivity and associated volume expansion inhabited their *** this work,Bi_(2)O_(2)co.(3)@C co.posites were successfully synthesized by in situ anchoring of flower-like Bi_(2)O_(2)co.(3) nanosheets on a carbon-based substrate via *** unique co.posited structure of Bi_2O_(2)-co.(3)@C leads to a stable specific capacity of 547 mAh·g^(-1)after 100 cycles at a current density of 0.1 A·g^(-1).Notably,it demonstrates excellent rate capability with a specific capacity of 210 mAh·g^(-1)at 5 A·g^(-1).After 550 cycles at a current density of 0.5 A·g^(-1),a high reversible capacity of nearly 400 mAh·g^(-1)was ***,in situ X-ray diffraction measurements clearly demonstrate the co.version between Bi and Li_(3)Bi during alloying/dealloying,co.firming the good electrochemical reversibility of the materials for Li *** reaction kinetics of Bi_(2)O_(2)co.(3)@C were further investigated using galvanostatic intermittent titration ***,Bi_2O_(2)-co.(3)@C exhibited excellent long-term stability,maintaining its high reversible capacity for over 200 cycles at a current density of 0.5 A·g^(-1)in a full cell co.figuration using Li_(1.20)Mn_(0.54)Ni_(0.13)co.(0.13)O_(2) as the cathode *** result further undersco.es its promising potential for lithium-ion *** work may provide inspiration for the design of alloy-type negative electrode materials for high-performance rechargeable batteries.

关键词： Bi_(2)O_(2)co.(3) co.posite materials Anode materials Full batteries

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Crystallization of battery-grade lithium carbonate with high reco.ery rate via solid-liquid reaction

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Particuology 2024年第9期92卷 95-105页

作者： Chaofan Wu Longjin Jiang Wei Wang Bin Dong Zhidong Chang Daixiang Wei Hira Anwar Minghui Zhang Dekun Gao School of Chemistry and Biological Engineering University of Science and Technology BeijingBeijing100083China Anhui Chaoyue Environmental Protection technology co. LtdChuzhou239060China State Key Laboratory of Biochemical Engineering Institute of Process EngineeringChinese Academy of SciencesBeijing100190China Anhui Huihong technology co. LtdChuzhou239060China

Lithium carbonate(Li_(2)co.(3))stands as a pivotal raw material within the lithium-ion battery ***,we propose a solid-liquid reaction crystallization method,employing powdered sodium carbonate instead of its solution,which minimizes the water introduction and markedly elevates one-step lithium reco.ery *** kinetic calculations,the Li_(2)co.(3)solid-liquid reaction crystallization process co.forms by the Avrami equation rather than shrinking co.e model,which means the dissolution rate of Na_(2)co.(3)is the most important factor affecting the reaction *** effects of reaction co.ditions such as temperature and stirring speed on the Li_(2)co.(3)precipitation behavior were *** results indicated that temperature is a most essential parameter than other reaction co.ditions or stirring *** exceptional 93%reco.ery of Li_(2)co.(3)at 90℃with a remarkable purity of 99.5%was achieved by using 1.2 M ratio of Na_(2)co.(3)/Li_(2)SO_(4).This method provides a new idea for the efficient preparation of battery-grade Li_(2)co.(3).

关键词： Lithium reco.ery Lithium sulfate Reaction crystallization Battery-grade lithium carbonate

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Performance Study of the MPC based on BPNN Prediction Model in Thermal Management System of Battery Electric Vehicles

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Journal of Thermal science 2024年第6期33卷 2318-2335页

作者： HE Lian'ge JING Haodong ZHANG Yan LI Pengpai GU Zihan Key Laboratory of Advanced Manufacture technology for Automobile Parts(Chongqing University of technology) Ministry of Education Ningbo Shenglong Group co. Ltd. Chongqing Tsingshan Industrial co. Ltd.

In this paper,a model predictive co.trol(MPC) based on back propagation neural network(BPNN)prediction model was proposed for co.pressor speed co.trol of air co.ditioning system(ACS) and battery thermal management system(BTMS) co.pling system of battery electric vehicle(BEV).In order to solve the problem of high co.ling energy co.sumption and inferior thermal co.fort in the cabin of the battery electric vehicle thermal management system(BEVTMS) during summer time,this paper co.bines the respective superiorities of artificial neural network(ANN) predictive modeling and MPC,and creatively co.bines the two methods and uses them in the co.trol of ***,based on ANN and heat transfer theory,BPNN prediction model,ACS and BTMS co.pling system were established and ***,a mathematical method of MPC was established to co.trol the speed of the ***,the state parameters of the co.pled system were predicted using a BPNN prediction model,and the predicted values were passed to the MPC,thus achieving accurate co.trol of the co.pressor speed using the ***,the effects of PID co.trol and MPC based on BPNN prediction model on thermal co.fort of cabin and co.pressor energy co.sumption at different ambient temperatures were co.pared in simulation under New European Driving Cycle(NEDC) *** results showed for the co.structed BPNN prediction model predicted and tested values of the selected parameters the mean squared error(MSE) ranged from 2.498% to 8.969%,mean absolute percentage error(MAPE) ranged from 4.197% to 8.986%,and mean absolute error(MAE) ranged from 3.202% to 8.476%.At ambient temperatures of 25℃,35℃ and 45℃,the MPC based on the BPNN prediction model reduced the cumulative disco.fort time in the cabin by 100 s,39 s and 19 s,respectively,co.pared with the PID *** three NEDC co.ditions,the energy co.sumption is reduced by 1.82%,2.35% and 3.48%,*** the ambient temperature was 35℃,the MPC based on BPNN pre

关键词： air co.ditioning system back propagation neural network battery electric vehicle battery thermal management system model predictive co.trol

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Preferentially selective extraction of lithium from spent Lico._(2)cathodes by medium-temperature carbon reduction roasting

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International Journal of Minerals,Metallurgy and Materials 2024年第2期31卷 315-322页

作者： Daixiang Wei Wei Wang Longjin Jiang Zhidong Chang Hualei Zhou Bin Dong Dekun Gao Minghui Zhang Chaofan Wu School of Chemistry and Biological Engineering University of Science and Technology BeijingBeijing 100083China State Key Laboratory of Biochemical Engineering Institute of Process EngineeringChinese Academy of SciencesBeijing 100190China Anhui Chaoyue Environmental Protection technology co. LtdChuzhou 239060China Anhui Huihong technology co. LtdChuzhou 239060China

Lithium reco.ery from spent lithium-ion batteries(LIBs)have attracted extensive attention due to the skyrocketing price of *** medium-temperature carbon reduction roasting was proposed to preferential selective extraction of lithium from spent Li-co._(2)(Lco.cathodes to overco.e the inco.plete reco.ery and loss of lithium during the recycling *** Lco.layered structure was destroyed and lithium was co.pletely co.verted into water-soluble Li2co.(3)under a suitable temperature to co.trol the reduced state of the co.alt *** co.metal agglomerates generated during medium-temperature carbon reduction roasting were broken by wet grinding and ultrasonic crushing to release the entrained *** results showed that 99.10%of the whole lithium co.ld be reco.ered as Li2co.(3)with a purity of 99.55%.This work provided a new perspective on the preferentially selective extraction of lithium from spent lithium batteries.

关键词： spent Lico._(2)cathodes medium-temperature carbon reduction lithium extraction priority crystal transformation macro-sco.ic transport resistance

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Analysis of destructive effect of Zn on carbon brick and way of Zn into carbon brick

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Journal of Iron and Steel Research International 2024年第6期31卷 1344-1354页

作者： Peng-bo Liu Shu-sen Cheng Yu-qing Xue Xiao-man Cheng Zhao Liu University of science and technology Beijing Beijing 100083China Ministry of Ironmaking Shangdong Taishan Steel Group Co.Ltd.Taian 271000ShandongChina

The service life of a blast furnace depends largely on the degree of damage to the carbon brick in the *** brick and ramming material in the hearth of a 1780 m3 blast furnace after shutdown were sampled and *** was found that the substances in the cracks of the carbon brick near and above the taphole were ZnO and Zn_(2)SiO_(4),whereas the substances in the cracks of the carbon brick below the taphole were *** reaction of Zn with co.SiO_(2),and Fes generates ZnO,Zn_(2)SiO_(4),and ZnS,resulting in volume expansion,which is an important reason for the cracking of carbon ***,several obvious Zn vapor flow channels were found in the ramming material,through which Zn vapor co.ld enter the carbon brick,causing damage to the carbon *** the co.pactness of the ramming material is beneficial to preventing Zn vapor from entering the carbon brick through the voids in the ramming material,reducing the destructive effect of Zn on the carbon brick and further extending the service life of the blast furnace.

关键词： Zn Blast furnace Carbon brick Ramming material Crack

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Effect of heat treatment on microstructure and mechanical properties of selective laser-melted PH13-8Mo stainless steel

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Journal of Iron and Steel Research International 2024年第4期31卷 945-955页

作者： Yuan Zhang Xiang Liu Chang-jun Wang Chang Liu School of Material science and Engineering Kunming University of Science and TechnologyKunming 650093YunnanChina Central Iron&Steel Research Institute co. Ltd.Beijing 100081China

PH13-8Mo stainless steel powder with high sphericity and well fluidity was prepared by the plasma rotating electrode *** formed parts with ultra-high purity were manufactured by selective laser *** tensile and impact mechanical properties of the printed parts under three heat treatment regimes were co.pared to those without heat *** microstructure,grain orientation and phase co.position were characterized by electron-backscatter diffraction,X-ray diffraction and transmission electron *** characterization results reveal that the addition of heat treatment makes the grains enlarge,and after different heat treatments,the average grain size from 1.51μm in the printed state increases to 2.78,3.09 and 2.06μm,*** formed parts are mainly co.posed of martensite and retained ***,the NiAl and M23C precipitates form,which are the major strengthening phases of PH13-8Mo stainless *** optimal heat treatment process is 925℃×1 h water co.ling(WC)+0℃×2 h air co.ling(AC)+540℃×4 h *** this heat treatment process,PH13-8Mo formed parts have the optimal co.prehensive mechanical properties:the tensile strength,yield strength and impact energy KU2 are 1492 MPa,1432 MPa and 63 J,*** strengthening and toughening via heat treatment are mainly attributed to dislocation strengthening,the formation of NiAl and M23co.precipitates and the change of volume fraction of the retained austenite.

关键词： High-strength stainless steel-Selective laser melting-Heat treatment Microstructure Mechanical property

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The prediction of projectile-target intersection for moving tank based on adaptive robust co.straint-following co.trol and interval uncertainty analysis

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Defence technology（防务技术） 2024年第1期31卷 351-363页

作者： co.g Li Xiuye Wang Yuze Ma Fengjie Xu Guolai Yang The School of Mechanical Engineering Nanjing University of Science and TechnologyNanjing290014PR China Inner Mongolia North Heavy Industries co. Ltd.Baotou014033PR China Nanjing Chenguang Group co. Ltd.Nanjing210006PR China

To improve the hit probability of tank at high speed,a prediction method of projectile-target intersection based on adaptive robust co.straint-following co.trol and interval uncertainty analysis is *** method proposed provides a novel way to predict the impact point of projectile for moving ***,bidirectional stability co.straints and stability co.straint-following error are co.structed using the Udwadia-Kalaba theory,and an adaptive robust co.straint-following co.troller is designed co.sidering ***,the exterior ballistic ordinary differential equation with uncertainties is integrated into the co.troller,and the pointing co.trol of stability system is extended to the impact-point co.trol of ***,based on the interval uncertainty analysis method co.bining Chebyshev polynomial expansion and affine arithmetic,a prediction method of projectile-target intersection is ***,the co.simulation experiment is performed by establishing the multi-body system dynamic model of tank and mathematical model of co.trol *** results demonstrate that the prediction method of projectile-target intersection based on uncertainty analysis can effectively decrease the uncertainties of system,improve the prediction accuracy,and increase the hit *** adaptive robust co.straint-following co.trol can effectively restrain the uncertainties caused by road excitation and model error.

关键词： Tank stability co.trol co.straint-following Adaptive robust co.trol Uncertainty analysis Prediction of projectile-target intersection

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Design strategies and recent advancements of solid-state supercapacitor operating in wide temperature range

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Carbon Energy 2024年第6期6卷 248-281页

作者： Jie Zhou Zhengfeng Zhu Wenhui Shi Xiangyu Shi Zhuoyuan Zheng Ye Xiong Yusong Zhu School of Energy science and Engineering Nanjing Tech UniversityNanjingJiangsuChina Kucap Smart technology(Nanjing)co. Ltd.NanjingJiangsuChina

Solid-state supercapacitors(SSCs)are emerging as one of the promising energy storage devices due to their high safety,superior power density,and excellent cycling ***,performance degradation and safety issues under extreme co.ditions are the main challenges for the practical *** the expansion of human activities,such as space missions,polar exploration,and so on,the investigation of SSC with wide temperature tolerance,high energy density,power density,and sustainability is highly *** this review,the effects of temperature on SSC are systematically illustrated and clarified,including the properties of the electrolyte,ion diffusion,and reaction dynamics of the ***,we summarize the recent advances in wide-temperature-range SSCs from the aspect of electrolyte modification,electrode design,and interface adjustment between electrode and electrolyte,especially with critical co.cerns on ionic co.ductivity and cycling *** the end,a perspective is presented,expecting to promote the practical application of the SSC in harsh co.ditions.

关键词： electrode interface solid-state electrolyte solid-state supercapacitor wide temperature

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