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Microstructure and Thermal Properties of (1-x) As_2S_3-xCdCl_2 Glassy System

Journal of Wuhan University of technology(materials Science) 2003年第3期18卷 43-45页

作者：陶海征 State Key Laboratory of Advanced Technology for Materials Synthesis and Processing School of Materials Science and EngineeringWuhan University of Technology

The homogeneous glass samples of the (1-x)As 2S 3 xCdCl 2 where x=0 and 0.05 were prepared by the conventional melt quenched *** addition of 5mol% CdCl 2 enhanced the glass transition temperature of pure As 2S 3 glass sample by about 30℃.Based on the experimental data,the microstructure is considered to be that the discrete molecule species of AsCl 3 and nanocrystal CdS is homogeneously dispersed in the disordered polymer network formed by AsS 3 pyramids interconnected by sulfur bridges.

关键词： chalcohalide microstructure thermal property

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Binding of Streptavidin to Surface-attached Biotin with Different Spacer Thicknesses

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Journal of Wuhan University of technology(materials Science) 2015年第6期30卷 1304-1309页

作者：李易非张海宁 Wuhan University of Technology Hospital State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology

The specific binding of receptor to ligand covalently attached to surface with different surface densities was studied using streptavidin-biotin model pair. Biotinylated substrates with different spacer thicknesses as formed through a simple reaction between amine immobilized surfaces and N-hydroxysucciimide groups at the end of biotin modifi ed PEG in anhydrous organic solutions（＂grafting to＂ technique）. The amount of the specifi cally adsorbed protein was measured as a function of spacer thickness between hard surface and biotin moieties. It has been shown that the amount of specifically adsorbed streptavidin decreases with the increase spacer thickness and the protein adsorbs onto the functionalized surfaces in a single molecular manner. It provides an interesting model system for studying single molecular interactions.

关键词： specifi c interaction biotin streptavidin polymer monolayer spacer thickness

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Three-Layer Structured SnO2@C@TiO2 Hollow Spheres for High-Performance Sodium Storage

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Energy & Environmental materials 2021年第3期4卷 428-433页

作者： Yu Tian Ping Hu Ting Zhu Zhenhui Liu Guangwu Hu Congcong Cai Zelang Jian Liang Zhou Liqiang Mai State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory

The unsatisfactory conductivity and large volume variation severely handicap the application of SnO2in sodium-ion batteries（SIBs）. Herein, we design unique three-layer structured SnO2@C@TiO2hollow spheres to tackle the above-mentioned issues. The hollow cavity affords empty space to accommodate the volume variation of SnO2, while the C and TiO2protecting shells strengthen the structural integrity and enhances the electrical conductivity. As a result, the three-layer structured SnO2@C@TiO2hollow spheres demonstrate enhanced Na storage performances. The SnO2@C@TiO2manifests a reversible capacity two times to that of pristine SnO2hollow spheres. In addition, Ex situ XRD reveals highly reversible alloying and conversion reactions in SnO2@C@TiO2hollow spheres. This study suggests the introduction of a hollow cavity and robust protecting shells is a promising strategy for constructing SIB anode materials.

关键词： hollow sphere SnO2 sodium-ion battery protecting shell structural integrity

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Microstructures and Microwave Dielectric Properties of La-Substituted Ba(Mg_1/3Nb_(2/3))O_3 Ceramics

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Journal of Rare Earths 2005年第S1期23卷 171-174页

作者：田中青韩星余洪滔张津黄伟九 School of Materials Science and Engineering Chongqing Institute of Technology Chongqing 400050 China State Key Lab of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 China) State Key Lab of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 China School of Materials Science and Engineering Chongqing Institute of Technology Chongqing 400050 China

La substituted Ba(Mg_ 1/3Nb_ 2/3)O_3 ceramics was expected to enhance the 1∶2 ordering degree of B-site ions due to the existence of vacancies that promote cation movement and result in improvement of the Q_f value. The relation between the microstructure and microwave dielectric properties of Ba_ 1-xLa_ 2x/3(Mg_ 1/3Nb_ 2/3)O_3 ceramics was investigated. La substituted Ba(Mg_ 1/3Nb_ 2/3)O_3 ceramics can improve the sinterability of specimens. Both 1:2 ordering degree and grain size increase as A-site vacancies increase. This can be explained by the existence of vacancies that promote cation movement. The Q_f value increase with small La content, then decrease rapidly. The highest Q_f value achieved in this investigation is about 55000 GHz for Ba_ 0.995La_ 0.01/3(Mg_ 1/3Nb_ 2/3)O_3. The improvement of Q_f value with A-site vacancies is related to the increase of the degree of B-site ordering and grain size of the specimen.

关键词： barium magnesium niobate microwave dielectric properties ordering microstructure

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Preparation and conductivity of TiO2-doped Y2O3-stabilized ZrO2 ceramic

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key Engineering materials 2007年 351卷 120-125页

作者： Lei, X.L. Zhang, D.M. Zhang, L.M. State Key Lab. of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 China

Nano-scale 8mol% titania doped yttria stabilized zirconia (8TiYSZ) powders were prepared by coprecipitation combined with azeotropic distillation process. Powder X-ray diffraction, BET method and TEM were performed to characterize the powder properties. The relative density of 8TiYSZ sample sintered by spark plasma sintering technique at 1150°C for 3min reached 99%. The electrical conductivity of sintered pellet was much higher than the reported one.

关键词： Yttria stabilized zirconia

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Vacancy-Based Defect Regulation for High Thermoelectric Performance in Ge9Sb2Te12-x Compounds

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ACS APPLIED materials & INTERFACES 2020年第17期12卷 19664-19673页

作者： Chen, Shuo Bai, Hui Li, Junjie Pan, Wenfeng Jiang, Xianyan Li, Zhi Chen, Zhiquan Yan, Yonggao Su, Xianli Wu, Jinsong Uher, Ctirad Tang, Xinfeng State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 China Hubei Nuclear Solid Physics Key Laboratory Department of Physics Wuhan University Wuhan 430072 China Hubei Nuclear Solid Physics Key Laboratory Department of Physics Wuhan University Wuhan 430072 China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 China Hubei Nuclear Solid Physics Key Laboratory Department of Physics Wuhan University Wuhan 430072 China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 China Department of Physics University of Michigan Ann Arbor Michigan 48109 United States State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 China

Defect engineering is the core strategy for improving thermoelectric properties. Herein, cation doping along with modulation of cation vacancy has been developed in GeTe-based materials as an effective method to induce vacancy-based defects to boost their thermoelectric performance. A series of ternary compounds of Ge9Sb2Te12-x (x = 0, 0.03, 0.06, 0.09, 0.12, 0.15) was prepared by vacuum-melting and annealing combined with the spark plasma sintering (SPS) process. The role of Sb doping and cation vacancy on thermoelectric properties was systematically investigated. It is found that alloying Sb2Te3 into GeTe increases the concentration of cation vacancies, which is corroborated by both positron annihilation measurements and theoretical calculations. The vacancies, stacking faults, and planar defect interactions determine the thermoelectric transport properties. Adjusting the deficiency of Te effectively tunes the concentration of cation vacancies and dopant defects in the structure. In turn, this tunes the carrier concentration close to its optimum. A high power factor of 32.6 mu W cm(-1) K-2 is realized for Ge9Sb2Te11.91 at 725 K. Moreover, large strains induced by the defect structures, including Sb dopant, vacancy, staking faults, as well as planar defects intensify phonon scattering, leading to a significant decrease in the thermal conductivity from 7.6 W m(-1) K-1 for pristine GeTe to Ge9Sb2Te11.85 at room temperature. All of the above contribute to a high ZT value of 2.1 achieved for the Ge9Sb2Te11.91 sample at 775 K.

关键词： GeTe-based compounds alloying with Sb2Te3 deficiency of Te stacking fault vacancy plane thermoelectric

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Fabrication of laminated TiB2-B4C/Cu-Ni composites by electroplating and spark plasma sintering

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Journal of materials Science & technology 2017年第10期33卷 1172-1176页

作者： Ziyi Wu Jinyong Zhang Taojie Shi Fan Zhang Liwen Lei Han Xiao Zhengyi Fu State Key Lab of Advanced Technology for Material Synthesis and Processing Wuhan University of Technology Wuhan 430070 China

We proposed a new method, electroplating followed by spark plasma sintering（SPS）, to fabricate laminated TiB2-B4 C/Cu-Ni composites with high strength and high toughness. It is found that a thin intermediate Cu layer can effectively enhance the strength of the interface between the ceramics and the metals, resulting in a high flexural strength and toughness of the laminated TiB2-B4 C composites simultaneously. A flexural strength and fracture toughness of 651 MPa and 11.6 MPam^（1/2） respectively,are achieved, an approximately 90% improvement over TiB2-B4 C bulk.

关键词： Laminated structure Electroplating Spark plasma sintering B4C ceramic

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High-temperature ultra-strength of dual-phase Re_(0.5)MoNbW(TaC)_(0.5) high-entropy alloy matrix composite

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Journal of materials Science & technology 2021年第25期84卷 1-9页

作者： Qinqin Wei Guoqiang Luo RongTu Jian Zhang Qiang Shen Yujie Cui Yunwei Gui Akihiko Chiba State Key Lab of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan430070China Institute for Materials Research Tohoku UniversitySendai980-8577Japan

The dual-phase Re_(0.5)MoNbW(TaC)_(0.5) composite,consisting of refractory body-centered cubic(BCC)highentropy alloy and carbide with many fine eutectic structures,was successfully synthesized by arc *** phase stability,high-temperature mechanical properties and strengthening mechanism of the ascast composite were *** microstructure of the composite remained stable after annealing at 1300℃for 168 *** exhibited remarkably high-temperature strength,yield strength~901 MPa,and true ultimate compressive strength~1186 MPa at 1200℃.The BCC phase and carbide exhibited a semi-coherent interface with good bonding after severe deformation at 1200℃.The dipolar dislocation walls in BCC phase,restricted dynamic interaction between defects in carbide,and the pinning effect of semi-coherent interface offered effective strengthening effects.

关键词： High-entropy alloy Composite Eutectic structure Strength Strengthening mechanism

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Hierarchically porous materials:synthesis strategies and emerging applications

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Frontiers of Chemical Science and Engineering 2016年第3期10卷 301-347页

作者： Minghui Sun Chen Chen Lihua Chen Baolian Su State Key Laboratory of Advanced Technology for Material Synthesis and Processing Wuhan University of Technology Laboratory of Inorganic Materials Chemistry

Great interests have arisen over the last decade in the development of hierarchically porous *** hierarchical structure enables materials to have maximum structural functions owing to enhanced accessibility and mass transport properties,leading to improved performances in various *** porous materials are in high demand for applications in catalysis,adsorption,separation,energy and *** the present review,recent advances in synthesis routes to hierarchically porous materials are reviewed together with their catalytic contributions.

关键词： hierarchically porous materials synthesis application

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Pvdf/Carbon Directional Microchannels-Enhanced Ion Diode-Like Hydrogel-Based Pressure Sensors

SSRN

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SSRN 2025年

作者： Wen, Xuezhong Zhang, Hongjian Eom, Taeuk Jeong, Chang Kyu Zhang, Yong State Key Laboratory of Advanced Technology for Materials Synthesis and Processing School of Materials Science and Engineering Wuhan University of Technology Wuhan430070 China Center for Smart Materials and Device Integration Wuhan University of Technology Wuhan430070 China Department of JBNU-KIST Industry-Academia Convergence Research Jeonbuk National University Jeonbuk Jeonju54896 Korea Republic of Division of Advanced Materials Engineering Jeonbuk National University Jeonbuk Jeonju54896 Korea Republic of Department of Energy Storage/Conversion Engineering of Graduate School Hydrogen and Fuel Cell Research Center Jeonbuk National University Jeonbuk Jeonju54896 Korea Republic of

Hydrogels are promising candidates for flexible electronics but are often constrained by narrow pressure-sensing ranges and unstable ion migration. To overcome these limitations, we developed an ionic hydrogel sensor incorporating diode-inspired bipolar architectures (PSSNa/PDACl) and poly(vinylidene fluoride)/carbon directional microchannels (PCDMC). The optimized 5-PCNPC hydrogel exhibits a broad pressure-sensing range (2.3–100 kPa) with a sensitivity of 0.360 mV·kPa−1 (a 35.6% enhancement) and a rectification ratio of 12.9, enabled by PCDMC-guided anisotropic ion transport and rapid stress dissipation (337 ms recovery). With excellent durability over 500 cycles and a power density of 1.17 mW·m−2, the hydrogel sensor demonstrates its potential in practical applications, including a 5×5 touchpad for spatial pressure mapping and real-time monitoring of respiration, swallowing, and locomotion. This study underscores the potential of hydrogel-based sensors with wide-range operability for next-generation wearables and interactive systems. © 2025, The Authors. All rights reserved.

关键词： Flexible electronics

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