检索结果-内蒙古大学图书馆

Roles of concentration-dependent Cu doping behaviors on the thermoelectric properties of n-type Mg_(3)Sb_(1.5)Bi_(0.5)

引用

Journal of Materiomics 2024年第1期10卷 154-162页

作者： Xinxin Yang Heng Ni Xiaotong Yu Biao Cao Juanjuan Xing Qiyong Chen Lili Xi Jiandang Liu Jiye Zhang Kai Guo Jing-Tai Zhao School of Materials Science and Engineering Shanghai University99 Shangda RoadShanghai200444China Materials Genome Institute Shanghai University99 Shangda RoadShanghai200444China State Key Laboratory of Particle Detection and Electronics University of Science and Technology of ChinaHefeiAnhui230026China School of Physics and Materials Science Guangzhou UniversityGuangzhou510006China Research Center for Advanced Information Materials(CAIM) Huangpu Research&Graduate School of Guangzhou UniversitySino-Singapore Guangzhou Knowledge CityHuangpu DistrictGuangzhou510555China Key Lab of Si-based Information Materials&Devices and Integrated Circuits Design Department of Education of Guangdong ProvinceChina School of Materials Science and Engineering Guilin University of Electronic TechnologyGuilin541004China Guangxi Key Laboratory of Information Materials Guilin University of Electronic TechnologyGuilin541004China

Large Seebeck coefficients induced by high degeneracy of conduction band minimum,and low intrinsic lattice thermal conductivity originated from large lattice vibrational anharmonicity render Mg_(3)Sb_(2)as a promising n-type thermoelectric ***,we demonstrated unique concentration-dependent occupation behaviors of Cu in Mg_(3.4)Sb_(1.5)Bi_(0.49)Te_(0.01)matrix,evidenced by structural characterization and transport property *** is found that Cu atoms prefer to enter the interstitial lattice sites in Mg_(3)Sb_(2)host with low doping level(Mg_(3.4)Sb_(1.5)Bi_(0.49)Te_(0.01)+x%Cu,x<0.3%),acting as donors for providing additional electrons without deteriorating the carrier *** x is larger than 0.3%,the excessive Cu atoms are inclined to substitute Mg atoms,yielding acceptors to decrease the electron *** a result,the electrical conductivity of the Mg_(3.4)Sb_(1.5)Bi_(0.49)Te_(0.01)+0.3%Cu sample reaches 2.3×10^(4)S/m at 300 K,increasing by 300%compared with that of the pristine *** figure of merit zT values in the whole measured temperature range are significantly improved by the synergetic improvement of power factor and reduction of thermal *** average zT∼1.07 from 323 K to 773 K has been achieved for the Mg_(3.4)Sb_(1.5)Bi_(0.49)Te_(0.01)+0.3%Cu sample,which is about 30%higher than that of the Mg_(3.4)Sb_(1.5)Bi_(0.49)Te_(0.01) sample.

关键词： Mg_(3)Sb_(2) Cu doping Concentration-dependent occupation Thermoelectric properties Average zT

来源：评论

学校读者我要写书评

暂无评论

3D-printed mechanically strong and extreme environment adaptable boron nitride/cellulose nanofluidic macrofibers

引用

Nano research 2023年第5期16卷 7609-7617页

作者： Le Yu Tingting Gao Ruiyu Mi Jing Huang Weiqing Kong Dapeng Liu Zhiqiang Liang Dongdong Ye Chaoji Chen School of Resource and Environmental Sciences Hubei Biomass-Resource Chemistry and Environmental Biotechnology Key LaboratoryWuhan UniversityWuhan 430079China Key Laboratory of Textile Science and Technology Ministry of EducationCollege of TextilesDonghua UniversityShanghai 201620China Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes National Laboratory of Mineral MaterialsSchool of Materials Science and TechnologyChina University of GeosciencesBeijing 100083China State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and EngineeringDonghua UniversityShanghai 201620China Interdisciplinary Materials Research Center School of Materials Science and EngineeringTongji UniversityShanghai 201804China Institute of Functional Nano and Soft Materials(FUNSOM) Jiangsu Key Laboratory for Carbon-Based Functional Materials and DevicesSoochow UniversitySuzhou 215123China School of Textile Materials and Engineering Wuyi UniversityJiangmen 529020China

Fibrous nanofluidic materials are ideal building blocks for implantable electrode,biomimetic actuator,wearable electronics due to their favorable features of intrinsic flexibility and unidirectional ion ***,the large-scale preparation of fibrous nanofluidic materials with desirable mechanical strength and good environment adaptability for practical use remains ***,by fully taking advantage of the attractive mechanical,structural,chemical features of boron nitride(BN)nanosheet and nanofibrillated cellulose(NFC),a scalable and cost-effective three-dimensional(3D)printed macrofiber featuring abundant vertically aligned nanofluidic channels is demonstrated to exhibit a good combination of high tensile strength of 100 MPa,thermal stability of up to 230℃,ionic conductivity of 1.8×10^(−4)S/cm at low salt concentrations(<10^(−3)M).In addition,the versatile surface chemistry of cellulose allows us to stabilize the macrofiber at the molecular level via a facile postcross-linking method,which eventually enables the stable operation of the modified macrofiber in various extreme environments such as strong acidic,strong alkaline,high *** believe this work implies a promising guideline for designing and manufacturing fibrous nanodevices towards extreme environment operations.

关键词： three-dimensional(3D)printing nanofluidic boron nitride cellulose macrofiber

来源：评论

学校读者我要写书评

暂无评论

Vectorial Digitelligent Optics for High-Resolution Non-Line-of-Sight Imaging

引用

engineering 2025年第2期45卷 70-78页

作者： Yinghui Guo Yunsong Lei Mingbo Pu Fei Zhang Qi Zhang Xiaoyin Li Runzhe Zhang Zhibin Zhao Rui Zhou Yulong Fan Xiangang Luo National Key Laboratory of Optical Field Manipulation Science and Technology Institute of Optics and ElectronicsChinese Academy of SciencesChengdu 610209China State Key Laboratory of Optical Technologies on Nano-Fabrication and Micro-Engineering Institute of Optics and ElectronicsChinese Academy of SciencesChengdu 610209China Research Center on Vector Optical Fields Institute of Optics and ElectronicsChinese Academy of SciencesChengdu 610209China College of Materials Science and Opto-Electronic Technology University of Chinese Academy of SciencesBeijing 100049China Tianfu Xinglong Lake Laboratory Chengdu 610299China

Object imaging beyond the direct line of sight is significant for applications in robotic vision,remote sensing,autonomous driving,and many other *** of a non-line-of-sight(NLOS)screen is a complex inverse problem that comes with ultrafast time-resolved imager requirements and substantial computational demands to extract information from the multi-bounce scattered ***,the echo signal always suffers from serious deterioration in both intensity and shape,leading to limited resolution and image ***,we propose a concept of vectorial digitelligent optics for high-resolution NLOS imaging to cancel the wall’s scattering and refocus the light onto hidden targets for enhanced *** this approach,the polarization and wavefront of the laser spot are intelligently optimized via a feedback algorithm to form a near-perfect focusing pattern through a random scattering *** raster scanning the focusing spot across the object’s surface within the optical-memory-effect range of the wall,we obtain nearly diffraction-limited NLOS imaging with an enhanced signal-to-noise *** experimental results demonstrate a resolution of 0.40 mm at a distance of 0.35 m,reaching the diffraction limit of the ***,we demonstrate that the proposed method is feasible for various complex NLOS *** methods may open an avenue for active imaging,communication,and laser wireless power transfer.

关键词： Non-line-of-sight imaging Vectorial digitelligent optics Spatial light modulator Digital optics Wavefront shaping Metasurface

来源：评论

学校读者我要写书评

暂无评论

Theoretical and experimental study of phase transformation and twinning behavior in metastable high-entropy alloys

引用

Journal of materials science & Technology 2022年第4期99卷 161-168页

作者： Zhibiao Yang Song Lu Yanzhong Tian Zijian Gu Jian Sun Levente Vitos Shanghai Key Laboratory of Advanced High-Temperature Materials and Precision Forming School of Materials Science and EngineeringShanghai Jiao Tong UniversityShanghai 200240China Applied Materials Physics Department of Materials Science and EngineeringRoyal Institute of TechnologyStockholm SE-10044Sweden Key Laboratory for Anisotropy and Texture of Materials(Ministry of Education) School of Materials Science and EngineeringNortheastern UniversityShenyang 110819China Division of Materials Theory Department of Physics and Materials ScienceUppsala UniversityP.O.Box 516Uppsala SE-75120Sweden Research Institute for Solid State Physics and Optics Wigner Research Center for PhysicsBudapest H-1525P.O.Box 49Hungary

Combined theoretical and experimental efforts are put forward to study the critical factors influencing deformation mode transitions in face-centered cubic *** revisit the empirical relationship between the stacking fault energy(SFE)and the prevalent deformation *** ab initio calculated SFE,we establish the critical boundaries between various deformation modes in the model Cr-Co-Ni solid solution *** agreement between theoretical predictions and experimental observations are *** findings shield light on applying quantum mechanical calculations in designing transformation-induced plasticity and twinning-induced plasticity mechanisms for achieving advanced mechanical properties.

关键词： Metastable alloys Stacking fault energy Twinning Martensitic transformation Co-Cr-Ni alloys

来源：评论

学校读者我要写书评

暂无评论

Construction of room-temperature self-healing polyurethane-based phase change composites for thermal control and energy supply

引用

science China Chemistry 2025年

作者： Yuling Ouyang Xiaofei Xu Yingqian Li Defeng Cao Qingbao Guan Zhengwei You State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and Engineering Institute of Functional Materials Research Base of Textile Materials for Flexible Electronics and Biomedical Applications (China Textile Engineering Society) Shanghai Engineering Research Center of Nano-Biomaterials and Regenerative Medicine Donghua University Shandong Inov Polyurethane Co. Ltd. Suzhou Xinghua High Tech Materials Technology Co. Ltd.

Solar energy is the main cause of overheating in the cabin of cars on summer days, resulting in a large amount of fossil energy being used for temperature control in cars. However, the conversion of solar energy in a low-energy way to realize in-vehicle temperature controlling and reduce the consumption of fossil fuels remains a significant challenge. Herein, we report a roomtemperature self-healing polyurethane(PU2) with excellent mechanical strength(10.4 MPa) to fabricate an energy conversion and supply composite(ST1/PU2) via combining with phase change microcapsules(MEPCMs), which efficiently realize invehicle temperature controlling. MEPCMs display superior phase transition enthalpy of 160.0 J/g, thermal conductivity0.34 W/(m K) and encapsulation performance(71.9%) in ST1/PU2. The resultant ST1/PU2 exhibits outstanding cooling effect/thermal insulation upon a light intensity of 5.1 W/cm2, where the actual temperature was reduced by 28.5 °C compared to ***, the self-healing triboelectric nanogenerator(S-TENG) based on ST1/PU2 provides continuous electrical signals and the healed S-TENG could be 100% recovered at 50 °C in 24 h, which shows great potential to significantly prolong the service life of devices. Consequently, this work will provide a new strategy to reduce the fossil energy consumption and promote the sustainability of flexible electronics.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Enhanced Magnetic Interaction between Ga and Fe in Two-Dimensional van der Waals Ferromagnetic Crystal Fe_(3)GaTe_(2)

引用

Chinese Physics Letters 2023年第8期40卷 108-112页

作者：查鹤鸣李炜张高节刘文晶邓力玮姜琦叶茂武浩常海欣乔山 State Key Laboratory of Functional Materials for Informatics Center for Excellence in Superconducting ElectronicsShanghai Institute of Microsystem and Information TechnologyChinese Academy of SciencesShanghai 200050China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China Department of Physics and State Key Laboratory of Surfac Physics Fudan UniversityShanghai 200433China State Key Laboratory of Material Processing and Die&Mold Technology School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074China Wuhan National High Magnetic Field Center and Institute for Quantum Science and Engineering Huazhong University of Science and TechnologyWuhan 430074China Center for Transformative Science ShanghaiTech UniversityShanghai 201210China Shanghai Synchrotron Radiation Facility Shanghai Advanced Research InstituteChinese Academy of SciencesShanghai 201210China Shenzhen R&D Center of Huazhong University of Science and Technology Shenzhen 518000China School of Physical Science and Technology ShanghaiTech UniversityShanghai 201210China

Fe_(3)GaTe_(2),a recently discovered van der Waals ferromagnetic crystal with the highest Curie temperature and strong perpendicular magnetic anisotropy among two-dimensional(2D)magnetic materials,has attracted significant attention and makes it a promising candidate for next-generation spintronic *** with Fe_(3)GeTe_(2),which has the similar crystal structure,the mechanism of the enhanced ferromagnetic properties in Fe_(3)GaTe_(2)is still unclear and needs to be ***,by using x-ray magnetic circular dichroism measurements,we find that both Ga and Te atoms contribute to the total magnetic moment of the system with antiferromagnetic coupling to Fe *** first-principles calculations reveal that Fe_(3)GaTe_(2)has van Hove singularities at the Fermi level in nonmagnetic state,resulting in the magnetic instability of the system and susceptibility to magnetic phase *** addition,the calculation results about the density of states in ferromagnetic states of two materials suggest that the exchange interaction between Fe atoms is strengthened by replacing Ge atoms with Ga *** findings indicate the increase of both the itinerate and local moments in Fe_(3)GaTe_(2)in view of Stoner and exchange interaction models,which results in the enhancement of the overall magnetism and a higher Curie *** work provides insight into the underlying mechanism of Fe_(3)GaTe_(2)’s remarkable magnetic properties and has important implications for searching 2D materials with expected magnetic properties in the future.

关键词： magnetic ferromagnetic mechanism

来源：评论

学校读者我要写书评

暂无评论

Simultaneously removal of P and B from Si by Sr and Zr co-addition during Al–Si low-temperature solvent refining

引用

International Journal of Minerals,Metallurgy and materials 2023年第2期30卷 365-377页

作者： Chen Chen Jingwei Li Qiuxia Zuo Boyuan Ban Jian Chen Key Lab of Photovoltaic and Energy Conservation Materials Institute of Solid State PhysicsHFIPSChinese Academy of SciencesHefei 230031China University of Science and Technology of China Hefei 230026China School of Materials Science and Engineering Hefei University of TechnologyHefei 230009China State Key Laboratory of Mineral Processing BGRIMM Technology GroupBeijing 100160China State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization Kunming University of Science and TechnologyKunming 650504China Engineering Research Center of High Performance Copper Alloy Materials and Processing Ministry of EducationHefei University of TechnologyHefei 230009China Shandong Aluminum Vocational College Weihai 264400China

To remove the key impurity elements,P and B,from primary Si simultaneously,Sr and Zr co-addition to Al-Si alloy systems during solvent refining has been *** reacts with Al,Si,and P in the melt to form a P-containing Al_(2)Si_(2)Sr phase and Zr reacts with B to form a ZrB_(2) *** the Al-Si-Sr-Zr system,high removal fractions of P and B in the primary Si,with 84.8%-98.4%and 90.7%-96.7%,respectively,are achieved at the same time,*** best removal effect is obtained in the sample with the addition of Sr-32000+Zr-3000μg·kg^(-1),and the removal fractions of P and B in the purified Si reach 98.4%and 96.1%.Compared with the Sr/Zr single-addition,the removal effects of Sr and Zr co-addition on P and B do not show a significant downward trend,indicating that the nucleation and growth of the B/P-containing impurity phases are mutually ***,an evolution model is proposed to describe the nucleation and the growth stages of Sr/Zr-containing compound phases,which reveals the interaction between the impurity phases and the primary Si.

关键词： Al2Si2Sr phase zirconium boride phase phase directional solidification solvent refining

来源：评论

学校读者我要写书评

暂无评论

基于低成本聚噻吩给体材料的卷对卷凹版印刷有机太阳能电池（英文）

引用

science China materials 2025年第5期68卷 1435-1444页

作者：祁伟涛袁熙越刘媛琪杨书涛储芸莎钱凡闫翎鹏王振国段春晖骆群马昌期 College of Materials Science and Engineering Taiyuan University of Technology i-Lab & Printable Electronics Research Center Suzhou Institute of Nano-Tech and Nano-BionicsChinese Academy of Sciences (CAS) Institute of Polymer Optoelectronic Materials and Devices Guangdong Basic Research Center of Excellence for Energy & Information Polymer MaterialsState Key Laboratory of Luminescent Materials and DevicesSouth China University of Technology

目前有机太阳能电池（OSCs）的能量转换效率（PCE）已超过20%,但大面积低成本有机太阳能电池的发展相对滞后.实现有机太阳能电池的低成本化,需要从材料和制备工艺两个方面进行突破;其中材料方面,聚噻吩是一种低成本的给体材料;制备工艺... 详细信息

目前有机太阳能电池（OSCs）的能量转换效率（PCE）已超过20%,但大面积低成本有机太阳能电池的发展相对滞后.实现有机太阳能电池的低成本化,需要从材料和制备工艺两个方面进行突破;其中材料方面,聚噻吩是一种低成本的给体材料;制备工艺方面,凹版印刷是一种可二维图案化、高速、高精度和低成本的大面积制备方法.为了实现低成本的OSCs,本工作采用低成本的聚噻吩材料为给体材料,通过卷对卷的凹版印刷技术制备了柔性OSCs.一方面,我们通过调节活性层油墨的浓度来调控活性层油墨的粘度,明显减弱了流动条纹,获得了均匀的印刷薄膜.另一方面,我们通过温度调节,明显抑制了凹印活性层薄膜微观形貌的过度聚集,获得了较优的微观形貌.最终,通过卷对卷凹版印刷制备1 cm2的柔性OSCs,获得了10.55%的器件效率,与旋涂器件相当.该结果表明低成本的聚噻吩材料体系可以通过卷对卷凹版印刷的方法制备,且有望大幅降低有机光伏的生产成本.

关键词： flexible OSCs gravure printing active layer polythiophene viscosity

来源：评论

学校读者我要写书评

暂无评论

Finite superconducting square wire-network based on two-dimensional crystalline Mo_(2)C

引用

Chinese Physics B 2022年第9期31卷 134-140页

作者： Zhen Liu Zi-Xuan Yang Chuan Xu Jia-Ji Zhao Lu-Junyu Wang Yun-Qi Fu Xue-Lei Liang Hui-Ming Cheng Wen-Cai Ren Xiao-Song Wu Ning Kang Key Laboratory for the Physics and Chemistry of Nanodevices School of Electronics and Center for Carbon-Based ElectronicsPeking UniversityBeijing 100871China Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China State Key Laboratory for Artificial Microstructure and Mesoscopic Physics Frontiers Science Center for Nano-optoelectronicsPeking UniversityBeijing 100871China School of Materials Science and Engineering University of Science and Technology of ChinaShenyang 110016China

Superconducting wire-networks are paradigms to study Cooper pairing issues,vortex dynamics and ***,emergent low-dimensional crystalline superconductors were reported in the minimal-disorder limit,providing novel platforms to reveal vortices-related *** on superconducting loops with high-crystallinity is thus currently ***,we report fabrication and transport measurement of finite square-network based on two-dimensional crystalline superconductor Mo_(2)*** observe oscillations in the resistance as a function of the magnetic flux through the *** dips at both matching field and fractional fillings are *** and current evolutions are carried out in magnetoresistance to study vortex *** amplitude of oscillation is enhanced due to the interaction between thermally activated vortices and the currents induced in the *** driving current reduces the effective activation energy for vortex,giving rise to stronger vortex ***,by the thermally activated vortex creep model,we derive the effective potential barrier for vortex dissipation,which shows well-defined correspondence with structures in *** work shows that low-dimensional crystalline superconducting network based on Mo_(2)C possesses pronounced potential in studying the modulation of vortex arrangements and dynamics,paving the way for further investigations on crystalline superconducting network with various configurations.

关键词： superconducting wire-network crystalline superconductor vortex dynamics low temperature transport

来源：评论

学校读者我要写书评

暂无评论

solid-state Li-air batteries:Fundamentals,challenges,and strategies

引用

SmartMat 2023年第4期4卷 105-144页

作者： Yuan Rao Jiawei Yang Shiyong Chu Shaohua Guo Haoshen Zhou Jiangsu Key Laboratory of Artificial Functional Materials National Laboratory of Solid State Micro‐StructuresCollaborative Innovation Center of Advanced Micro‐StructuresCentral Universities and Frontiers Science CenterCollege of Engineering and Applied SciencesNanjing UniversityNanjingJiangsuChina Shenzhen Research Institute Nanjing UniversityShenzhenGuangdongChina

The landmark Net Zero Emissions by 2050 Scenario requires the revolution of today's energy system for realizing nonenergy-related global *** batteries with high energy density and safety are expected to realize the shift of end-use sectors toward renewable and clean sources of *** Li-ion technologies have dominated the modern energy market but face with looming challenges of limited theoretical specific capacity and high ***-air(O2)battery,characterized by energy-rich redox chemistry of Li stripping/plating and oxygen conversion,emerges as a promising“beyond Li-ion”*** view of the superior stability and inherent safety,a solid-state Li-air battery is regarded as a more practical choice compared to the liquid-state ***,there remain many challenges that retard the development of solid-state Li-air *** this review,we provide an in-depth understanding of fundamental science from both thermodynamics and kinetics of solid-state Li-air batteries and give a comprehensive assessment of the main *** discussion of effective strategies along with authoritative demonstrations for achieving highperformance solid-state Li-air batteries is presented,including the improvement of cathode kinetics and durability,solid electrolyte design,Li anode optimization and protection,as well as interfacial engineering.

关键词： interfacial engineering Li anode Li-air battery oxygen conversion solid electrolyte

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：