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Electric and magnetic properties of multiferroic CZFMO doped BNLTBKTBaT composite ceramics prepared via the solid-state combustion method

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Ceramics International 2025年第16期51卷 22886-22901页

作者： Klinbanmor, Metarsit Thatawong, Bhoowadol Somsri, Widchaya Prasertpalichat, Sasiphon Vittayakorn, Naratip Pinitsoontorn, Supree Rittidech, Aurawan Jantaratana, Pongsakorn Bongkarn, Theerachai Department of Physics Faculty of Science Naresuan University Phitsanulok65000 Thailand Research Center for Academic Excellence in Applied Physics Faculty of Science Naresuan University Phitsanulok65000 Thailand Advanced Material Research Unit Faculty of Science King Mongkut's Institute of Technology Ladkrabang Bangkok10520 Thailand Khon Kaen University Khon Kaen40002 Thailand Department of Physics Faculty of Science Mahasarakham University Mahasarakham 44150 Thailand Department of Physics Faculty of Science Kasetsart University Bangkok10900 Thailand

The present research work describes in detail investigations of the multiferroic properties of (1-x) (0.85Bi0.5Na0.475Li0.025TiO3-0.11Bi0.5K0.5TiO3-0.04BaTiO3)-xCo0.6Zn0.4Fe1.7Mn0.3O4 [(1-x)BNLTBKTBaT-xCZFMO];x = 0, 0.05, 0.10, 0.15 and 0.20 composite ceramics, synthesized by the solid-state combustion technique. The effect of increasing x content on the phase structure, microstructure, electrical and magnetic properties of (1-x)BNLTBKTBaT-xCZFMO composite ceramics was investigated. X-ray diffraction patterns of the BNLTBKTBaT sample showed a pure perovskite phase (rhombohedral and tetragonal structures). When CZFMO was added, the XRD patterns showed a co-structure between perovskite and cubic spinel ferrite structures. The composite grains were composed of large and small sizes, which were composed of mainly the elements of BNLTBKTBaT and CZFMO, respectively. As x increased, the average grain size of the larger grains increased, and the smaller grains got smaller. The density decreased from 5.54 to 4.61 g/cm3 as x increased. Increasing the amount of CZFMO in BNLTBKTBaT also resulted in a decrease in the dielectric constant (Εr) and the remnant polarization (Pr), with the leakage current observed at x = 0.20. The saturation magnetization (Ms) and the magnetoelectric coupling coefficient (αE) increased with increased x. It was found that x = 0.15 gave the optimal electric, magnetic, and magnetoelectric properties (Εr = 425, Pr = 1.64 μC/cm, Ms = 1.1948 emu/g and αE = 4.88 mV/cm-Oe), which makes the composite potentially more applicable for information technology and spintronics devices. © 2025

关键词： Perovskite

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Nickel-Catalyzed Regiodivergent Acylzincation of Styrenes with Organozincs and CO

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Chinese Journal of Chemistry 2024年第6期42卷 599-604页

作者： Chenglong Wang Ning Liu Xianqing Wu Jingping Qu Yifeng Chen Key Laboratory for Advanced Materials and Joint International Research Laboratory of Precision Chemistry and Molecular Engineering Feringa Nobel Prize Scientist Joint Research CenterFrontiers Science Center for Materiobiology and Dynamic ChemistrySchool of Chemistry and Molecular EngineeringEast China University of Science and TechnologyShanghai200237 China Dedicated to the Special Issue of C1 Chemistry.

Transition metal-catalyzed carbometallation of unsaturated hydrocarbons constitutes one of the most efficient synthetic methodologies for the construction of C—C ***,the incorporation of organometallic reagent with the CO gas as a nucleophilic acyl synthon could enable the acylmetallation reaction,which greatly increases the horizon of carbometallation ***,we report a nickel-catalyzed regiodivergent acylzincation of o-cyano cinnamate ester and o-cyano styrene,in which the cyano moiety intramolecularly captures zinc intermediates to trigger the tandem cyclization *** protocol features mild conditions,broad substrate scope and excellent functional group tolerance,thus affording a diverse array of highly functionalized carbocyclic compounds.

关键词： Carbonylation Carbometallation Styrene Nickel Cyclization

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Boundedness and Positivity Preserving Numerical Analysis of a Fuzzy-Parameterized Delayed Model for Foot and Mouth Disease Dynamics

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Computer Modeling in Engineering & sciences 2024年第12期141卷 2527-2554页

作者： Muhammad Tashfeen Fazal Dayan Muhammad Aziz ur Rehman Thabet Abdeljawad Aiman Mukheimer Department of Mathematics School of ScienceUniversity of Management and TechnologyLahore54000Pakistan Department of Mathematics and Sciences Prince Sultan UniversityRiyadh11586Saudi Arabia Department of Medical Research China Medical UniversityTaichung40402Taiwan Department of Mathematics and Applied Mathematics School of Science and TechnologySefakoMakgatho Health Sciences UniversityGa-Rankuwa0208South Africa Center for Applied Mathematics and Bioinformatics(CAMB) Gulf University for Science and TechnologyHawally32093Kuwait

Foot-and-mouth disease(FMD)is a viral disease that affects cloven-hoofed animals including cattle,pigs,and sheep,hence causing export bans among others,causing high economic losses due to reduced *** global effect of FMD is most felt where livestock rearing forms an important source of *** is therefore important to understand the modes of transmission of FMD to control its spread and prevent its *** work intends to address these dynamics by including the efficacy of active migrant animals transporting the disease from one area to another in a fuzzy mathematical modeling *** models of epidemics are determinable with a set of deterministic parameters and this does not reflect on real-life scenarios as observed in *** theory is used in this model as it permits the inclusion of uncertainties in the model;this makes the model more of a reality regarding disease transmission.A time lag,in this case,denotes the incubation period and other time-related factors affecting the spread of FMD and,therefore,is added to the current model for *** that purpose,the analysis of steady states and the basic reproduction number are performed and,in addition,the stability checks are conveyed in the fuzzy *** the numerical solution of the model,we derive the Forward Euler Method and the fuzzy delayed non-standard finite difference(FDNSFD)*** studies of the FDNSFD scheme are performed for convergence,non-negativity,boundedness,and consistency analysis of the numerical projection to guarantee that the numerical model is an accurate discretization of the continuous dynamics of FMD transmission over *** the following simulation study,we show that the FDNSFD method preserves the characteristics of the constant model and still works if relatively large time steps are employed;this is a bonus over the normal finite difference *** study shows how valuable it is to adopt fuzzy theory and time delays whe

关键词： FMD Virus delay epidemic model fuzzy parameters stability consistency

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HfC–HfO_(2) modified high/superhigh temperature thermal protection coating for superior hot corrosion resistance and antioxidation performance

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Journal of advanced Ceramics 2025年第1期14卷 177-191页

作者： Zhiyun Ye Shuqi Wang Shuang Yu Xinrui Zhao Yongchun Zou Guoliang Chen Lei Wen Lina Zhao Guangxi Zhang Yaming Wang Jiahu Ouyang Dechang Jia Yu Zhou State Key Laboratory of Precision Welding&Joining of Materials and Structures Harbin Institute of TechnologyHarbin 150001China Institute for Advanced Ceramics Harbin Institute of TechnologyHarbin 150001China Key Laboratory of Advanced Structure-Function Integrated Materials and Green Manufacturing Technology Harbin Institute of TechnologyHarbin 150001China National Center for Materials Service Safety University of Science and Technology BeijingBeijing 100083China Xi’an Aerospace Composites Research Institute Academy of Aerospace Propulsion TechnologyXi’an 710025China

With advances in the thrust-weight ratio,the service temperature of gas turbine engines even exceeds 1500℃,which is urgent for the development of high/superhigh-temperature thermal protection systems(TPSs)for long-term *** alloys are increasingly viewed as promising structural materials for high-temperature applications because of their superior high-temperature mechanical strength,but the“pest”catastrophic oxidation greatly restricts their further *** this study,a HfC–HfO_(2)-modified silicide coating was prepared via an innovative method of halide-activated pack cementation(HAPC)combined with liquid-plasma-assisted particle deposition and sintering of niobium alloys,resulting in a composite coating with excellent hot corrosion resistance and high-temperature oxidation *** modified multilayer coating is characterized by the synergistic combination of a dense NbSi_(2) inner layer and a HfC–HfO_(2) porous outer layer,resulting in a significant improvement in high-temperature performance compared with that of the single NbSi_(2) *** corrosion gain of the composite coating is only 13.94 mg·cm^(−2) after a corrosion time of 200 h at 900℃,and an intact oxide scale surface is observed after oxidation at 1500℃for 500 *** improvement is attributed to the formation of a robust Hf-rich skeleton provided by the deposited HfC–HfO_(2) layer,which can accelerate the formation of a highly stable corroded layer/oxide *** addition,multiple stress release mechanisms of the composite coating at high temperatures also provide substantial contributions to long-term *** these merits make HfC–HfO_(2)-modified composite coatings on niobium alloys competitive for the development of high/superhigh-temperature thermal protection systems for long-term service.

关键词： thermal protection coating niobium alloys hot corrosion resistance high-temperature oxidation resistance stress release mechanism

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Dry basal plane graphene wrappings on spherical nickel-rich oxide layered particles for lithium-ion batteries

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Journal of Energy Chemistry 2025年第5期104卷 10-19页

作者： Van-Chuong Ho Thanh N.Huynh Thi Huong Pham Hyun-seung Kim Hun-Gi Jung Ki Jae Kim Seung-Min Oh Young-Jun Kim Junyoung Mun School of Advanced Materials Science and Engineering Sungkyunkwan UniversitySeobu-roJangan-guSuwon-siGyeonggi-do 2066Republic of Korea SKKU Advanced Institute of Nano Technology(SAINT) Sungkyunkwan UniversitySuwonRepublic of Korea Advanced Batteries Research Center Korea Electronics Technology Institute25Saenari-roSeongnam 13509Republic of Korea Energy Storage Research Center Korea Institute of Science and TechnologySeoul 02792Republic of Korea KIST-SKKU Carbon-Neutral Research Center Sungkyunkwan UniversitySuwon 16419Republic of Korea Department of Energy Science Sungkyunkwan UniversitySuwon 16419Republic of Korea Battery Cell Development Team 1 Research&Development DivisionHyundai Motor Company150Hyundaiyeonguso-roNamyang-eupHwaseong-siGyeonggi-do 18280Republic of Korea Department of Nano Engineering Sungkyunkwan UniversitySuwonRepublic of Korea SKKU Institute of Energy Science and Technology(SIEST) Sungkyunkwan University2066Seobu-roJangan-guSuwon-siGyeonggi-do 16419Republic of Korea

Particle-to-particle dry graphene coatings on Ni-rich layered oxide materials are proposed for highenergy lithium-ion batteries(LIBs)to mitigate the inherent and engineering challenges related to the electrochemically fragile surfaces,as well as limiting electrode thickness and *** a shear stress-based coating process without supplementary solvent or heat treatment,graphene sheets derived from graphene powder are applied onto the surface of spherical LiNi_(0.89)Co_(0.055)Mn_(0.055)O_(2)(NCM)*** process achieves a coating thickness equivalent to or fewer than 10 layers of graphene and exposes the basal *** graphene-coated material increases particle hardness and mitigates degradation caused by inter-particle pressure,enabling the formation of high-density electrodes without *** the absence of additional carbon-conducting agents for the high-density composite electrode with a density of 4.0 g cm^(-3),it significantly enhances rate capability,demonstrating more than 5 times improvement by achieving 149.4 mAh g^(-1)at 2 C compared to the bare sample(28.9 mAh g^(-1)).Furthermore,the dry graphene coating enables the high areal capacity of 6.98 mAh cm^(-2).By exposing the basal plane of the graphene coating,the process enhances chemical stability,effectively inhibiting side reactions at the interface and mitigating cycle degradation.

关键词： Dry graphene coating Basal-plane coating Particle-to-particle High electrical conductivity High areal capacity

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Adaptable "bubble particles" prepared by green aqueous phase reshaping for completely removing odor

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Nano research 2024年第3期17卷 2172-2180页

作者： Jiajia Ma Yichang Xia Tienan Zhao Wenfeng Hu Weifeng Zhang Qinfei Ke Yi Zhao Shanghai Frontiers Science Center of Advanced Textiles Donghua UniversityShanghai 201620China Engineering Research Center of Technical Textiles Ministry of EducationDonghua UniversityShanghai 201620China School of Fashion Engineering Central Laboratory Shanghai University of Engineering ScienceShanghai 201620China Department of Materials Science and Engineering National University of SingaporeSingapore 117575Singapore School of Perfume and Aroma Technology Shanghai Institute of TechnologyShanghai 201418China

Facile and ecofriendly loading of micro/nano function-specific substances to create functional materials is a trend being pursued by ***,current micro/nano particles loading approaches are often hindered by issues such as uneven distribution,unsatisfactory stability and complicate *** this work,we present an aqueous phase reshaping method that only utilizes the moisture to fabricate the"bubble particles",which could perfectly cater to the topography of the *** green preparation of bubble particles adopts an absolutely zero-pollution method,realizing the firm loading of particles on the *** the preparation and loading of particles overcomes the traditional complicate process,while the aqueous phase reshaping ensures uniform and firm loading of the"bubble particles"onto the *** mechanism demonstrates a significant enhancement in the interface relation after aqueous phase reshaping,with a 121-fold increase in contact surface area achieved by reducing the height by 1μ***,we explore for the first time the influence of the nature of the receiving substrate on the interface morphology of particles during electrostatic spraying,which has important guiding significance for the interface relationship of electrostatic spraying and even electrostatic spinning *** also screen out the natural antibacterial essential oil linalool as the effective specialized antibacterial agent,which can specifically inhibit the odor-producing Proteus in urine,with an antibacterial rate of up to 100%.Taken together,this simple,ecofriendly method for fabricating functional materials with optimal interface stability appears highly promising for use in various products formed by electrostatic spraying/spinning.

关键词： bubble particle electrostatic spraying aqueous phase reshaping interface bonding remove odor nano spraying

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Strong,tough,and thermally conductive nacre-inspired boron nitride nanosheet/epoxy layered nanocomposites

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Nano research 2024年第2期17卷 820-828页

作者： Huagao Wang Rongjian Lu Lei Li Cheng Liang Jia Yan Rui Liang Guoxing Sun Lei Jiang Qunfeng Cheng School of Chemistry Key Laboratory of Bio-inspired Smart Interfacial Science and Technology of Ministry of EducationBeihang UniversityBeijing 100191China School of Chemistry and Materials Science University of Science and Technology of ChinaHefei 230026China Suzhou Institute for Advanced Research University of Science and Technology of ChinaSuzhou 215123China Department of Stomatology Fifth Medical CenterChinese PLA General HospitalBeijing 100039China Department of Engineering Science Faculty of Innovation EngineeringMacao University of Science and TechnologyAvenida Wai LongTaipaMacao 999078 China Joint Key Laboratory of the Ministry of Education Institute of Applied Physics and Materials EngineeringUniversity of MacaoAvenida da UniversidadeTaipaMacao 999078China Institute of Energy Materials Science(IEMS) University of Shanghai for Science and TechnologyShanghai 200093China

Thermally conductive polymer nanocomposites integrated with lightweight,excellent flexural strength,and high fracture toughness(KIc)would be of great use in many ***,achieving all of these properties simultaneously remains a great *** by natural nacre,here we demonstrate a lightweight,strong,tough,and thermally conductive boron nitride nanosheet/epoxy layered(BNNEL)*** of the layered structure and enhancing the interfacial interactions through hydrogen bonding and Si–O–B covalent bonding,the resulting nacre-inspired BNNEL nanocomposites show high fracture toughness of~4.22 MPa·m^(1/2),which is 7 folds as high as pure ***,the BNNEL nanocomposites demonstrate sufficient flexural strength(~168.90 MPa,comparable to epoxy resin),while also being lightweight(~1.23 g/cm^(3)).Additionally,the BNNEL nanocomposites display a thermal conductivity(κ)of~0.47 W/(m·K)at low boron nitride nanosheet loading of 2.08 vol.%,which is 2.7 times higher than that of pure epoxy *** developed nacre-inspired strategy of layered structure design and interfacial enhancement provides an avenue for fabricating high mechanical properties and thermally conductive polymer nanocomposites.

关键词： nacre-inspiration nanocomposites flexural strength fracture toughness(KIc) thermal conductivity

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Flow Behavior and Dynamic Recrystallization Mechanism of CSS‑42L Bearing Steel During Hot Compression Deformation

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Acta Metallurgica Sinica(English Letters) 2025年第3期38卷 465-480页

作者： Tianyi Zeng Zirui Luo Hao Chen Wei Wang Ke Yang School of Packaging and Materials Engineering Hunan University of TechnologyZhuzhou 412007China Shi-Changxu Innovation Center for Advanced Materials Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China School of Materials Science and Engineering University of Science and Technology of ChinaShenyang 110016China CAS Key Laboratory of Nuclear Materials and Safety Assessment Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China

In this work,fow behavior and dynamic recrystallization(DRX)mechanism of a low carbon martensitic stainless bearing steel,CSS-42L,were investigated using a thermomechanical simulator under the temperature and strain rate ranges of 900 to 1100℃ and 0.1 to 20 s^(−1),*** Arrhenius-type constitutive equation was established based on the fow stress ***,the peak stress decreased with the increase in deformation temperature and the decrease in strain *** were two DRX mechanisms during hot deformation of the current studied steel,the main one being discontinuous dynamic recrystallization mechanism,acting through grain boundary bulging and migration,and the auxiliary one being continuous dynamic recrystallization mechanism,working through the rotation of *** the basis of microstructural characterizations,power dissipation maps and fow instability maps,the optimized hot deformation parameters for CSS-42L bearing steel were determined as 1050℃/0.1 s^(−1) and 1100℃/1 s^(−1).

关键词： CSS-42L bearing steel Hot deformation Flow stress Constitutive equation Discontinuous dynamic recrystallization Continuous dynamic recrystallization

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High-performance thermal interface materials enabled by vertical alignment of lightweight and soft graphene foams

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Nano research 2024年第11期17卷 9293-9299页

作者： Huaqiang Fu Renqiang Fang Chao Tian Wei Qian Shiya Cao Ziran Zhang Xiaoxi Xu Chuang Yao Zhe Wang Daping He School of Materials Science and Engineering Wuhan University of Technology Wuhan 430070 China Hubei Engineering Research Center of RF-Microwave Technology and Application School of Science Wuhan University of Technology Wuhan 430070 China School of Materials and Microelectronics Wuhan University of Technology Wuhan 430070 China Shanghai Institute of Satellite Engineering Shanghai 201109 China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 China

High-performance thermal interface materials (TIMs) are highly sought after for modern electronics. Two-dimensional (2D) materials as vertical aligned fillers can optimize the out-plane thermal conductivity (k ⊥), but their excessively high content or intrinsic rigidness deteriorate TIMs softness, leading to worsening for thermal contact resistance (R contact). In this study, 2D graphene materials are fabricated into lightweight and soft graphene foams (GFs) with high-orientation, acting as vertical filler frameworks to optimize the k ⊥ and R contact for vertical GF (VGF) TIMs. The VGF-TIM has a high k ⊥ of 47.9 W·m^(−1)·K^(−1) at a low graphene content of 15.5 wt.%. Due to the softness and low filler contents of GFs, the VGF-TIM exhibits a low compressive module (4.2 MPa), demonstrating excellent compressibility. The resulting TIM exhibit a low contact resistance of 24.4 K·mm2·W^(−1), demonstrating 185.1% higher cooling efficiency in practical heat dissipating scenario compared to commercial advanced TIMs. This work provides guidelines for the design of advanced TIMs and their applications in thermal management.

关键词： graphene foam thermal resistance thermal conductivity thermal interface materials

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Cellulose Elementary Fibrils as Deagglomerated Binder for High-Mass-Loading Lithium Battery Electrodes

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Nano-Micro Letters 2025年第5期17卷 281-296页

作者： Young-Kuk Hong Jung-Hui Kim Nag-Young Kim Kyeong-Seok Oh Hong-I Kim Seokhyeon Ryu Yumi Ko Ji-Young Kim Kwon-Hyung Lee Sang-Young Lee Department of Chemical and Biomolecular Engineering Yonsei University50 Yonsei-RoSeodaemun-GuSeoul 03722Republic of Korea Advanced Analysis and Data Center Korea Institute of Science and Technology(KIST)Seoul 02792Republic of Korea Ulsan Advanced Energy Technology R&D Center Korea Institute of Energy Research(KIER)Ulsan 44776Republic of Korea Department of Battery Engineering Yonsei University50 Yonsei-RoSeodaemun-GuSeoul 03722Republic of Korea

Amidst the ever-growing interest in high-mass-loading Li battery electrodes,a persistent challenge has been the insufficient continuity of their ion/electron conduction ***,we propose cellulose elementary fibrils(CEFs)as a class of deagglomerated binder for high-mass-loading *** from natural wood,CEF represents the most fundamental unit of cellulose with nanoscale *** preparation of the CEFs involves the modulation of intermolecular hydrogen bonding by the treatment with a proton acceptor and a hydrotropic *** elementary deagglomeration of the cellulose fibers increases surface area and anionic charge density,thus promoting uniform dispersion with carbon conductive additives and suppressing interfacial side reactions at ***,a homogeneous redox reaction is achieved throughout the *** resulting CEF-based cathode(overlithiated layered oxide(OLO)is chosen as a benchmark electrode active material)exhibits a high areal-mass-loading(50 mg cm^(-2),equivalent to an areal capacity of 12.5 mAh cm^(-2))and a high specific energy density(445.4 Wh kg–1)of a cell,which far exceeds those of previously reported OLO *** study highlights the viability of the deagglomerated binder in enabling sustainable high-mass-loading electrodes that are difficult to achieve with conventional synthetic polymer binders.

关键词： Cellulose elementary fibrils Deagglomeration Electrode binders Lithium batteries High-mass-loading

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