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Effect of Eu3+,Bi3+,and Li+ doping on luminescent property of GdNbO4

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Journal of Rare Earths 2024年第1期42卷 66-75页

作者： s.W.Wi y.s.Lee Department of Physics and Integrative Institute of Basic sciences Soongsil University

We investigated the emission properties of Eu3+-doped GdNbO4-based oxide phosphors,aiming at improving the Eu3+emission by codoping of Bi3+and Li+.Eu3+singly doped,Eu3+and Bi3+doubly doped,and Eu3+,Bi3+,and Li+triply doped GdNbO4were prepared using a high-temperature solid-state reaction *** red-orange emissions from Eu3+in the singly doped samples are significantly improved by the codoping of Bi3+,mainly due to the energy transfer from Bi3+to Eu3+.The additional codoping of Li+is found to increase the Eu3+emission *** improvement might be attributed to the increase in the photoluminescent quantum yield originating from larger grain sizes and better crystallinity.A detailed analysis of the X-ray diffraction pattern and the asymmetric ratio estimated from the photoluminescence spectra show that the local lattice environment around Eu3+in GdNbO4does not change significantly with the codoping of Bi3+and Li+.Our results indicate that Li+doping is a promising way to improve the emission properties of rare-earth ion-doped GdNbO4phosphors.

关键词： Eu 3+ GdNbO 4 Codoping of Li + Photoluminescence sensitizer Rare earths

Decomposition solutions and Bäcklund transformations of the B-type and C-type Kadomtsev-Petviashvili equations

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Communications in Theoretical Physics 2024年第6期76卷 34-44页

作者： Xiazhi Hao s y Lou College of science Zhejiang University of TechnologyHangzhou 310014China school of Physical science and Technology Ningbo UniversityNingbo 315211China

This paper introduces a modified formal variable separation approach,showcasing a systematic and notably straightforward methodology for analyzing the B-type Kadomtsev-Petviashvili(BKP)*** the application of this approach,we successfully ascertain decomposition solutions,Bäcklund transformations,the Lax pair,and the linear superposition solution associated with the aforementioned ***,we expand the utilization of this technique to the C-type Kadomtsev-Petviashvili(CKP)equation,leading to the derivation of decomposition solutions,Bäcklund transformations,and the Lax pair specific to this *** results obtained not only underscore the efficacy of the proposed approach,but also highlight its potential in offering a profound comprehension of integrable behaviors in nonlinear ***,this approach demonstrates an efficient framework for establishing interrelations between diverse systems.

关键词： decomposition solution Backlund transformation Lax pair linear superposition solution

Construction of 2D/2D Ti_(3)C_(2)T_(x)MXene/Cds heterojunction with photothermal effect for efficient photocatalytic hydrogen production

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Journal of Materials science & Technology 2024年第4期171卷 1-9页

作者： T.y.Huang Z.yang s.y.yang Z.H.Dai y.J.Liu J.H.Liao G.y.Zhong Z.J.Xie y.P.Fang s.s.Zhang Key Laboratory for Biobased Materials and Energy of Ministry of Education Guangdong Laboratory for Lingnan Modern AgricultureCollege of Materials and EnergySouth China Agricultural UniversityGuangzhou 510643China school of Physics and Optoelectronics South China University of TechnologyGuangzhou 510640China school of Chemical Engineering and Energy Technology Guangdong Provincial Key Laboratory of Distributed Energy SystemsDongguan University of TechnologyDongguan 523808China

The insensitivity of semiconductors to visible and infrared light is a key constraint on the utilization of light energy in photocatalytic *** photocatalysts with full-spectrum absorption through surface engineering is an effective approach to fully harnessing light energy in semiconductor ***,a novel stable Ti_(3)C_(2)T_(x)MXene/Cds heterojunction catalyst is obtained by in-situ epitaxial growth of two-dimensional(2D)Cds nanosheets on 2D MXene interface via a solvothermal *** exceptional light absorption properties of MXene confer outstanding full-spectrum driven photocat-alytic hydrogen evolution capability upon the heterogeneous *** unique 2D/2D structure effectively mitigated the recombination of photogenerated carriers,enhancing the photocatalytic performance of the ***,the composite catalyst exhibits a significantly higher surface temperature of 80.4℃under visible light irradiation at an intensity of 0.1 W/cm^(2),which is 1.84 times higher than that of *** irradiation of visible and near infrared light,the composite catalyst with photothermal ef-fect demonstrates a remarkable hydrogen evolution rate of 65.4 mmol g^(-1)h^(-1),which is 7.2 times higher than that of Cds *** study introduces a novel approach for constructing full-spectrum absorption catalysts and expands the application of the photothermal effect in photocatalytic hydrogen evolution research.

关键词： Two-dimensional structure Heterostructure Photothermal effect Photocatalyst Hydrogen evolution

Distinct Electrical and Mechanical Responses of a Cu-10Fe Composite Prepared by Hot-Pressed sintering and Post Treatment

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Acta Metallurgica sinica(English Letters) 2024年第2期37卷 255-265页

作者： X.y.yue s.y.Peng X.Zhang C.N.He y.Z.Tian Key Laboratory for Anisotropy and Texture of Materials(Ministry of Education) School of Materials Science and EngineeringNortheastern UniversityShenyang110819China school of Materials science and Engineering and Tianjin Key Laboratory of Composite and Functional Materials Tianjin UniversityTianjin300350China Research Centre for Metallic Wires Northeastern UniversityShenyang110819China

A Cu-10wt%Fe composite was prepared through hot-pressed sintering,and the material was subsequently solution *** hot-pressed sintered and solution treated materials were rolled and *** precipitation behavior and performance changes were systematically studied by using scanning electron microscopy and transmission electron *** contrast to the hot-pressed sintered specimen,the solution treatment significantly affects the thermal stability and properties of the Cu-10wt%Fe *** Cu-10wt%Fe composite was prepared after solid solution,cold rolling and aging at 773 K for 1 h,and it obtained excellent tensile strength of 494 MPa,uniform elongation of 16.3%,electrical conductivity of 51.1%IACs and softening temperature of 838 *** for the distinct difference in thermal stability and properties between hot-pressed sintered and solution treated specimens were *** findings provide a theoretical basis for designing high-performance Cu-based in-situ composites by post treatment.

关键词： Cu-Fe composite Hot-pressed sintering Thermal stability strength Electrical conductivity

Thermo-kinetic characteristics on stabilizing hetero-phase interface of metal matrix composites by crystal plasticity finite element method

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Journal of Materials science & Technology 2024年第2期169卷 53-67页

作者： y.B.Zhang s.J.song F.Liu state Key Laboratory of solidification Processing Northwestern Polytechnical UniversityXi’an 710072China Analytical&Testing Center Northwestern Polytechnical UniversityXi’an 710072China

Using dislocation-based constitutive modeling in three-dimension crystal plasticity finite element(3D CPFE)simulations,co-deformation and instability of hetero-phase interface in different material systems were herein studied for polycrystalline metal matrix composites(MMCs).Local stress and strain fields in two types of 3layer MMCs such as fcc/fcc Cu-Ag and fcc/bcc Cu-Nb have been predicted under simple compressive ***,more severe strain-induced interface instability can be observed in the fcc/bcc systems than in the fcc/fcc systems upon refining to metallic nanolayered composites(MNCs).By detailed analysis of stress and strain localization,it has been demonstrated that the interface instability is always accompanied by high-stress concentration,i.e.,thermodynamic characteristics,or high strain prevention i.e.,kinetic characteristics,at the hetero-phase *** then follows that the thermodynamic driving forceG and the kinetic energy barrier Q during dislocation and shear banding can be adopted to classify the deformation modes,following the so-called thermo-kinetic *** by inserting a high density of high-energy interfaces into the Cu-Nb composites,such thermo-kinetic integration at the hetero-phase interface allows a successful establishment of MMCs with the high△G-high Q deformation mode,which ensures high hardening and uniform strain distri-bution,thus efficiently suppressing the shear band,stabilizing the hetero-phase interface,and obtaining an exceptional combination in strength and *** hetero-phase interface chosen by a couple of thermodynamics and kinetics can be defined as breaking the thermo-kinetic correlation and has been proposed for artificially designing MNCs.

关键词： Thermodynamics and kinetics Physics-based constitutive modeling Hetero-phase interface Crystal plasticity finite element

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用于增强断纬自清装置可靠性的机器监测系统

国际纺织导报 2018年第7期46卷 22-24页

作者： M.saggiomo J.Klug y.s.gloy T.Gries 雷敏(译) 孟粉叶(校) 亚琛工业大学纺织技术研究所(ITA)(德国) 不详

高科技织物需有高质量的检测。织物的质量需求因其特定应用而异,如对于汽车安全气囊而言,含有疵点是不可接受的。织造过程中的断纬是织物出现疵点的一个可能原因。为在喷气织造过程中清理断纬,现代织机上普遍安装有自动清除断纬的系统,... 详细信息

高科技织物需有高质量的检测。织物的质量需求因其特定应用而异,如对于汽车安全气囊而言,含有疵点是不可接受的。织造过程中的断纬是织物出现疵点的一个可能原因。为在喷气织造过程中清理断纬,现代织机上普遍安装有自动清除断纬的系统,该系统的可靠性约为80%。尽管自动清除系统显示清除成功,但梭口内仍然有污点或断纬纱片的情况占20%。研究旨在将纬纱自动清除系统的可靠性提高至95%,以提高织造厂加工高品质科技织物的生产率。减少断纬率造成的停机时间可大幅提高喷气织机的织造效率。为增强断纬自动清除系统的可靠性,开发了一种用于检查喷气织机梭口的断纬机器监测系统。在完成自动清纱程序后,机器监测系统还会检查梭口是否清理干净。

关键词：断纬自动清除系统喷气织机可靠性织物疵点

建筑与运输行业用可循环纺织覆盖物生态设计方法

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国际纺织导报 2015年第9期43卷 48-50页

作者： U.Rübsam A.schrter y.s.gloy G.seide T.Gries 郭军亚琛工业大学纺织技术研究所

"建筑和运输行业用可循环纺织覆盖物生态设计方法(Eco Me Tex)"项目开发了一种可循环纺织地毯的生产方法,其部分研究成果可用于一种可循环再利用的地毯设计与开发,实现了可循环地毯的部分设计。研发过程研究了2种主要的生产品种,一种是... 详细信息

"建筑和运输行业用可循环纺织覆盖物生态设计方法(Eco Me Tex)"项目开发了一种可循环纺织地毯的生产方法,其部分研究成果可用于一种可循环再利用的地毯设计与开发,实现了可循环地毯的部分设计。研发过程研究了2种主要的生产品种,一种是仅以聚酰胺6(PA 6)为原料生产的机织地毯产品,另一种是增加分隔层的簇绒地毯。两种生产方式采用的原料皆为用化学方法循环处理的PA 6(Econyl)长丝,由意大利Aquafil sp A公司提供。

关键词：可循环地毯聚酰胺6 分隔层

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织造加工中的即时维修理念

国际纺织导报 2016年第11期44卷 28-30页

作者： M.saggiomo J.Heibeyn y.s.gloy T.Gries 郭文君(译) 李刚(校) 亚琛工业大学纺织研究所德国不详

任何机械生产系统都会因与磨损相关的故障等而导致必要的维修,从而降低其生产率。机器组件,如轴承出现故障,则必须停机至机器修复,因此必将影响生产进度。这些无法预料的停机可能造成不能如期完成生产,此外,停工也会给生产厂家带来损失... 详细信息

任何机械生产系统都会因与磨损相关的故障等而导致必要的维修,从而降低其生产率。机器组件,如轴承出现故障,则必须停机至机器修复,因此必将影响生产进度。这些无法预料的停机可能造成不能如期完成生产,此外,停工也会给生产厂家带来损失。如果未持续监控机器组件,则其失效通常都不可预知。维修机器所需的时间通常比更换坏组件花费的时间更多。这也是安装状态监测系统的价值所在,状态监则系统能够自动监测组件的状态并预估可能发生的故障。该系统在纺织生产上非常有用,因为纺织品是在高速条件下生产的,即时维修的理念旨在尽可能多地减少因机器维修造成的耽搁,生产过程中很小的耽搁都会对利润产生巨大的影响。

关键词：织造加工即时维修状态监测故障

用于有机板增强体的混合型碳纤维非织造布全周期项目

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国际纺织导报 2018年第9期46卷 41-42页

作者： C.Lutke y.s.gloy T.Gries A.Endres D.Teufl 贺春霞(译) 孟粉叶(校) 亚琛工业大学纺织技术研究所(ITA) 德国德国造纸研究所(PTs) 德国慕尼黑工业大学碳纤维研究中心(LCC) 德国不详

在"全周期(FullCycle)"项目(IGF-Reference 18717BG)的实施过程中,亚琛工业大学纺织技术研究所(ITA)﹑德国造纸研究所(PTs)与慕尼黑工业大学碳纤维研究中心(LCC)联合开发出用于有机板增强体的混合型碳纤维非织造布。该项目于2015年开始... 详细信息

在"全周期(FullCycle)"项目(IGF-Reference 18717BG)的实施过程中,亚琛工业大学纺织技术研究所(ITA)﹑德国造纸研究所(PTs)与慕尼黑工业大学碳纤维研究中心(LCC)联合开发出用于有机板增强体的混合型碳纤维非织造布。该项目于2015年开始实施,项目旨在将气流成网和造纸工艺结合,制备具有各向同性结构的碳纤维基混合增强型产品。

关键词：碳纤维增强结构拉伸强度固结