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Improving wear resistance of 3D printed alumina-based ceramics via sintering temperature

China Foundry 2025年第2期22卷 151-162页

作者： Jing-wen Sun He Li Yun-song Mu Bao-xia Mu Yan-hua Chen Paolo Colombo School of Materials Science and Engineering Xinjiang Key Laboratory of Solid State Physics and DevicesXinjiang UniversityUrumqi 830046China School of Materials Science and Engineering Xinjiang Environmental and Functional Materials Engineering Research CenterXinjiang UniversityUrumqi 830046China School of Physics Science and Technology Xinjiang UniversityUrumqi 830046China Department of Industrial Engineering University of PadovaPadova 35131Italy

Ceramic materials with intricate structures can be efficiently fabricated using stereolithography(SLA)based 3D printing technology,offering advantages over traditional *** temperature has primary effect on properties of *** study investigated the crucial sintering temperature for 3D printed ceramics to ensure the desired *** results indicate that all samples exhibit a consistent layered structure across the experimental sintering *** the sintering temperature is increased from 1,250℃ to 1,350℃,the grain's morphology changes from spherical to *** morphology analysis reveals a decrease in surface roughness at sintering temperatures above 1,350℃.Mechanical tests show improved flexural strength and stiffness as the sintering temperature *** and wear experiments demonstrate that as the sintering temperature increases from 1,450℃ to 1,550℃,the wear pattern on ceramic surfaces transitions from deep pits to shallow *** increase in sintering temperature effectively enhances the wear resistance of 3D printed alumina *** improvement plays a significant role in expanding the application field of these ceramics,prolonging the lifespan of parts,reducing production costs,enhancing performance,and promoting environmental *** this study,ceramics achieve the highest strength and best wear resistance when sintered at 1,600℃,resulting in the best overall performance.

关键词： sintering temperature friction and wear properties stereolithography alumina ceramics

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Multiple dynamic bonds enable high mechanical strength and efficient room-temperature self-healable polyurethane for triboelectric nanogenerators

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science China Chemistry 2025年第4期68卷 1468-1477页

作者： Wenwen Zhang Huixia Xuan Xiaofei Xu Jiaming Lou Qingbao Guan Zhengwei You State Key Laboratory for Modification of Chemical Fibers and Polymer Materials Institute of Functional MaterialsCollege of Materials Science and EngineeringShanghai Key Laboratory of Lightweight CompositeResearch Base of Textile Materials for Flexible Electronics and Biomedical Applications(China Textile Engineering Society)Shanghai Engineering Research Center of Nano-Biomaterials and Regenerative MedicineDonghuaUniversityShanghai 201620China

For room temperature self-healing triboelectric nanogenerators(TENGs);the inherent contradiction between mechanical strength and self-healing properties was an urgent problem to be *** on the phenol-carbamate bond;this paper proposed a strategy to design a new molecular structure and coordinate the triple dynamic bonds;which provided a feasible strategy to solve this *** polytetramethylene ether glycol(M_(n)=1;000)as the soft segment in the main chain of polyurethane(PU);meanwhile methylene diphenyl diisocyanate and 4,4'-dihydroxybiphenyl(BP)as the hard segment and chain extension agent;respectively;the combination of tetrad benzene ring endowed the resultant 4BP-PU withπ-π*** effective reversible dissociation and association with hydrogen bond not only bestowed 4BP-PU with high mechanical strength(16.14 MPa);but also promoted high self-healing efficiency(94.8%)at room temperature.4BP-PU was selected as the elastic substrate between polydimethylsiloxane and copper sheet to prepare a self-healing TENG to collect energy from natural ***;the rational molecular structure design provided new ideas for developing self-healing materials and fabricating energy harvest electronics.

关键词： polyurethane self-healing phenolic urethane bonds mechanical property triboelectric nanogenerator

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engineering Ferroelectric Interlayer between Li_(1.3)Al_(0.3)Ti_(1.7)(PO_(4))_(3)and Lithium Metal for Stable solid-state Batteries Operating at Room Temperature

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Energy & Environmental materials 2023年第6期6卷 305-311页

作者： Tian Gu Likun Chen Yanfei Huang Jiabin Ma Peiran Shi Jie Biao Ming Liu Wei Lu Yanbing He Shenzhen All-Solid-State Lithium Battery Electrolyte Engineering Research Center Institute of Materials Research(IMR)Tsinghua Shenzhen International Graduate SchoolShenzhen 518055China College of Materials Science and Engineering Shenzhen UniversityShenzhen 518055China School of Materials Science and Engineering Tsinghua UniversityBeijing 100084China

The poor contact and side reactions between Li_(1.3)Al_(0.3)Ti_(1.7)(PO_(4))_(3)(LATP)and lithium(Li)anode cause uneven Li plating and high interfacial impendence,which greatly hinder the practical application of LATP in high-energy density solid-state Li metal *** this work,a multifunctional ferroelectric BaTiO_(3)(BTO)/poly(vinylidene fluoride-co-trifluoroethylene-co-chlorotrifluoroethylene)(P[VDF-TrFE-CTFE])composite interlayer(B-TERB)is constructed between LATP and Li metal anode,which not only suppresses the Li dendrite growth,but also improves the interfacial stability and maintains the intimate interfacial contact to significantly decrease the interfacial resistance by two orders of *** B-TERB interlayer generates a uniform electric field to induce a uniform and lateral Li deposition,and therefore avoids the side reactions between Li metal and LATP achieving excellent interface *** a result,the Li/LATP@B-TERB/Li symmetrical batteries can stably cycle for 1800 h at 0.2 mA cm^(-2)and 1000 h at 0.5 mA cm^(-2).The solid-state LiFePO_(4)/LATP@B-TERB/Li full batteries also exhibit excellent cycle performance for 250 cycles at 0.5 C and room *** work proposes a novel strategy to design multifunctional ferroelectric interlayer between ceramic electrolytes and Li metal to enable stable room-temperature cycling performance.

关键词： BaTiO_(3) dendrites ferroelectric Li_(1.3)Al_(0.3)Ti_(1.7)(PO_(4))_(3) lithium metal

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A 606 W burst-mode picosecond Yb-doped all-fiber laser with an intra-burst repetition rate of 469 MHz

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High Power Laser science and engineering 2024年第6期12卷 168-177页

作者： Xinyao Li Haijuan Yu Shuzhen Zou Chaojian He Chaoyu Ning Wenjuan Wu Xuechun Chen Xuechun Lin Laboratory of All-Solid-State Light Sources Institute of SemiconductorsChinese Academy of SciencesBeijingChina College of Materials Science and Opto-Electronic Technology University of Chinese Academy of SciencesBeijingChina Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijingChina Beijing Engineering Technology Research Center of All-Solid-State Lasers Advanced Manufacturing BeijingChina Southwest Institute of Technical Physics ChengduChina

This paper introduces a novel fiber-based picosecond burst-mode laser system capable of operating at high power and high repetition rates. A pulse-circulating fiber ring was developed as a burst generator, achieving an intra-burst repetition rate of 469 MHz without the need for a high-repetition-rate seed source. This design also allows for flexible adjustment of the number of sub-pulses, burst repetition rate and burst shape. In addition, a master oscillator power amplifier was employed to analyze the amplification characteristics of bursts. The system demonstrated a maximum average power of 606 W, with a measured sub-pulse duration of 62 ps and the highest sub-pulse peak power of 980 kW. To the best of our knowledge, this marks the highest average power obtained in burst-mode ultrafast lasers. Such a laser system holds potential for applications in precision manufacturing, high-speed imaging, high-precision ranging and other diverse domains.

关键词： burst-mode laser high power high repetition rate picosecond fiber laser

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Multifunctional C/TiO_(2) from MXene/Polyaniline for Electromagnetic Protection and Supercapacitor

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Energy Material Advances 2024年第1期5卷 527-542页

作者： Xiaodan Xu Yanxiang Wang Chengjuan Wang Bowen Cui Chengguo Wang Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials(Ministry of Education) State Key Laboratory of Crystal MaterialsShandong UniversityJinan 250061China Carbon Fiber Engineering Research Center School of Materials Science and EngineeringShandong UniversityJinan 250061China

Enormous endeavors have been made to cope with microwave pollution and energy ***,porous nitrogen-doped C/TiO_(2) composites with absorption/shielding/supercapacitor functions were derived from MXene/*** was discovered that KOH acted as porogen and had an etching-bridging-reaction effect during the activation *** a microwave absorber,the composite/paraffin with a filler loading of 16 wt%reaches a minimum reflection loss of−52.8 dB and an effective absorption bandwidth of 4.72 ***,microwave absorption can be maintained within 45 days in *** with untreated MXene,the absorber shows long-term functional stability in an oxygen-containing *** for electromagnetic interference shielding,the composite/paraffin at a filler loading of 50 wt%achieves 30.5 dB from 8.0 to 12.4 ***,the heterostructure delivers a desirable specific capacitance of 1,096.3 F g^(−1) at 0.5 A g^(−1).The trifunctional characteristics enrich the application trials of MXene derivatives and satisfy the strong need for versatile materials.

关键词： microwave absorberthe electromagnetic interference shielding functional stability porous nitrogen doped c tio composites mxene polyaniline heterostructure microwave absorption supercapacitor

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Recent advances of photolithography patterning of quantum dots for micro-display applications

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Nano materials science 2025年第1期7卷 49-64页

作者： Xuemin Kong Xiaotong Fan Yuhui Wang Yunshu Luo Yihang Chen Tingzhu Wu Zhong Chen Yue Lin Shuli Wang Fujian Engineering Research Center for Solid-State Lighting Department of Electronic ScienceSchool of Electronic Science and EngineeringXiamen UniversityXiamen361005China State Key Laboratory of Physical Chemistry of Solid Surface Xiamen UniversityXiamen361005China Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province(IKKEM) Xiamen361102China

The preparation of red,green,and blue quantum dot(QD)pixelated arrays with high precision,resolution,and brightness poses a significant challenge on the development of advanced micro-displays for virtual,augmented,and mixed reality *** the controlled synthesis of high-performance QDs,a reliable QD patterning technology is crucial in overcoming this *** the various methods available,photolithography-based patterning technologies show great potentials in producing ultra-fine QD patterns at micron *** review article presents the recent advancements in the field of QD patterning using photolithography techniques and explores their applications in micro-display ***,we discuss QD patterning through photolithography techniques employing photoresist(PR),which falls into two categories:PRassisted photolithography and photolithography of ***,direct photolithography techniques based on photo-induced crosslinking of photosensitive groups and photo-induced ligand cleavage mechanisms are thoroughly ***,we assess the performance of QD arrays fabricated using these photolithography techniques and their integration into QD light emitting diode display devices as well as color conversionbased micro light emitting diode display ***,we summarize the most recent developments in this field and outline future prospects.

关键词： Quantum dot Photolithography Patterning technology Micro-display

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Gate Tunable Labyrinth Domain Structures in a van der Waals Itinerant Ferromagnet Cr_(7)Te_(8)

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Chinese Physics Letters 2024年第9期41卷 122-132页

作者： Kui Meng Zeya Li Yicheng Shen Xiangyu Bi Junhao Rao Yuting Qian Zhansheng Gao Peng Chen Caiyu Qiu Feng Qin Jinxiong Wu Feng Luo Junwei Huang Hongtao Yuan National Laboratory of Solid State Microstructures Jiangsu Key Laboratory of Artificial Functional MaterialsCollege of Engineering and Applied Sciencesand Collaborative Innovation Center of Advanced MicrostructuresNanjing UniversityNanjing 210000China Center for the Physics of Low-Dimensional Materials Henan Joint International Research Laboratory of New Energy Materials and DevicesSchool of Physics and ElectronicsHenan UniversityKaifeng 475004China Tianjin Key Lab for Rare Earth Materials and Applications Center for Rare Earth and Inorganic Functional MaterialsSmart Sensor Interdisciplinary Science CenterSchool of Materials Science and EngineeringNankai UniversityTianjin 300350China

Manipulating magnetic domain structure plays a key role in advanced spintronics *** rationale is that the labyrinthine domain structure,normally appearing in ferromagnetic thin films with strong magnetic anisotropy,shows a great potential to increase data storage density for designing magnetic nonvolatile memory and logic ***,an electrical control of labyrinthine domain structure remains ***,we demonstrate the gate-driven evolution of labyrinthine domain structures in an itinerant ferromagnet Cr_(7)Te_(8).By combining electric transport measurements and micromagnetic finite difference simulations,we find that the hysteresis loop of anomalous Hall effect in Cr_(7)Te_(8)samples shows distinct features corresponding to the generation of labyrinthine domain *** labyrinthine domain structures are found to be electrically tunable via Li-electrolyte gating,and such gate-driven evolution in Cr_(7)Te_(8)originates from the reduction of the magnetic anisotropic energy with gating,revealed by our micromagnetic *** results on the gate control of anomalous Hall effect in an itinerant magnetic material provide an opportunity to understand the formation and evolution of labyrinthine domain structures,paving a new route towards electric-field driven spintronics.

关键词： rational electrolyte ferromagnetic

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Electrolyte engineering and interphase chemistry toward high-performance nickel-rich cathodes:Progress and perspectives

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materials Reports(Energy) 2025年第1期5卷 19-31页

作者： Shangjuan Yang Ke Yang Jinshuo Mi Shaoke Guo Xufei An Hai Su Yanbing He Shenzhen All-Solid-State Lithium Battery Electrolyte Engineering Research Center Institute of Materials Research(IMR)Tsinghua Shenzhen International Graduate SchoolTsinghua UniversityShenzhen518055China School of Materials Science and Engineering Tsinghua UniversityBeijing100084China

Nickel(Ni)-rich layered oxides have drawn great attention as cathode for lithium batteries due to their high capacity,high working voltage and competitive ***,the operation of Ni-rich cathodes suffers from the notorious structural degradation and interfacial side reactions with electrolytes and thus incurs premature failure,especially at high charge cut-off voltages(≥4.4 V).For this,various structural and interphase regulation strategies(such as coating modification,element doping,and electrolyte engineering)are developed to enhance the cycling survivability of Ni-rich *** them,electrolyte engineering by changing solvation structure and introducing additives has been considered an efficient method for constructing robust cathode-electrolyte interphases(CEI),inhibiting the formation of harmful species(such as HF and H_(2)O)or restraining the dissolution of transition metal ***,there is still an absence of systematic guidelines for selecting and designing competitive electrolyte systems for Ni-rich layered *** this review,we comprehensively summarize the recent research progress on electrolyte engineering for Ni-rich layered cathodes according to their working ***,we propose future perspectives of improving the electrolyte performance,which will provide new insights for designing novel electrolytes toward high-performance Ni-rich layered cathodes.

关键词： Ni-rich cathodes Solvation structure regulation Electrolyte additives Cathode-electrolyte interphase High charging cut-off voltage

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Liquid-solid phase separation and recycling of permalloys in liquid Mg

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Journal of materials science & Technology 2024年第21期188卷 27-36页

作者： Pengju Yang Jie He Baodong You Mingwei Zhu Shaogang Wang Ivan Kaban Jiuzhou Zhao Shi-changxu Innovation Center for Advanced Materials Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China School of Materials Science and Engineering Shenyang Aerospace UniversityShenyang 110136China School of Materials Science and Engineering University of Science and Technology of ChinaShenyang 110016China Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China Leibniz Institute for Solid State and Materials Research-IFW Dresden Helmholtzstr2001069 DresdenGermany

Liquid-solid phase separation of permalloy in liquid Mg results in selectively dissolved Ni,which provides a unique opportunity for the design of immiscible heterogeneous composite materials and the comprehensive metal recycling of permalloy scraps.A guideline of the alloy design for the liquid-solid phase separation system was *** effects of immersion temperature and time on the Ni extraction were studied by an experimental *** diffusion behavior of Ni from the permalloy to liquid Mg and the microstructure evolution in the permalloy during the liquid-solid phase separation were *** results show that the Ni in the permalloy was quickly extracted into the liquid Mg and formed an Mg-Ni alloy,while the other components such as Fe,Co,and Mn were held back in the phase-separated *** phase-separated permalloy with the solidified Mg exhibits a three-dimensional(3D)Fe/Mg bicontinuous composite ***,simple treatments were carried out for the reaction products such as the Fe/Mg bicontinuous composite and the Mg-Ni alloy,and the recycling strategies for functionalization of these treated reaction products were provided.A 3D porous Fe-based alloy with electromagnetic interference(EMI)shielding efficiency of 52 dB can be obtained if Mg is removed from the Fe/Mg bicontinuous *** of the complete separation of pure Ni from the recycled Mg-Ni alloy by vacuum distilling,the Mg-Ni alloy can be enriched into Mg2 Ni as an initial hydrogen storage material.

关键词： Immiscible alloys Liquid-solid phase separation Permalloy Selective extraction Recycling

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Selective substitution induced anomalous phonon stiffening within quasi-one-dimensional P–P chains in SiP2

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Nano research 2023年第1期16卷 1107-1114页

作者： Xueting Dai Feng Qin Caiyu Qiu Ling Zhou Junwei Huang Fanghua Cheng Xiangyu Bi Caorong Zhang Zeya Li Ming Tang Shengqiang Wu Xiaoxu Zhao Yangfan Lu Huiyang Gou Hongtao Yuan National Laboratory of Solid State Microstructures Jiangsu Key Laboratory of Artificial Functional MaterialsCollege of Engineering and Applied Sciencesand Collaborative Innovation Center of Advanced MicrostructuresNanjing UniversityNanjing 210000China School of Materials Science and Engineering Peking UniversityBeijing 100871China College of Materials Science and Engineering National Engineering Research Center for Magnesium AlloysChongqing UniversityChongqing 400030China Center for High Pressure Science and Technology Advanced Research Beijing 100094China

Light-matter interactions in low-dimensional quantum-confined structures can dominate the optical properties of the materials and lead to optoelectronic *** anisotropic layered silicon diphosphide(SiP2)crystal,the embedded quasi-onedimensional(1D)phosphorus–phosphorus(P–P)chains directly result in an unconventional quasi-1D excitonic state,and a special phonon mode vibrating along the P–P chains,establishing a unique 1D quantum-confined *** SiP2 with the homologous element serves as an effective way to study the properties of these excitons and phonons associated with the quasi-1D P–P chains,as well as the strong interaction between these ***,the experimental observation and the related optical spectral understanding of SiP2 with isoelectronic dopants remain ***,with the photoluminescence and Raman spectroscopy measurements,we demonstrate the redshift of the confined excitonic peak and the stiffening of the phonon vibration mode■of a series of Si(P1−xAsx)2 alloys with increasing arsenic(As)*** anomalous stiffening of■is attributed to the selective substitution of As atoms for P atoms within the P–P chains,which is confirmed via our scanning transmission electron microscopy *** optical spectra evolutions with selective substitution pave a new way to understand the 1D quantum confinement in semiconductors,offering opportunities to explore quasi-1D characteristics in SiP2 and the resulting photonic device application.

关键词： SiP2 quasi-one-dimensional structure Raman photoluminescence phosphide

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