检索结果-内蒙古大学图书馆

3D printing of Nd: YAG transparent composite ceramics

Ceramics International 2025年

作者： Ji, Haohao Xie, Mengmeng Liu, Yu Chen, Nianjiang Wang, Shiwei Liu, Dianzi Gao, Wenlan Wang, Haoran Dong, Yanhao Zhang, Jian State Key Laboratory of High Performance Ceramics and Superfine Microstructure Shanghai Institute of Ceramics Chinese Academy of Sciences Shanghai200050 China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences Beijing100049 China School of Mechanical Engineering Jiangnan University Jiangsu Wuxi214122 China Science and Technology on Solid-State Laser Laboratory Beijing100015 China School of Engineering University of East Anglia NorwichNR4 7TJ United Kingdom State Key Laboratory of New Ceramics and Fine Processing School of Materials Science and Engineering Tsinghua University Beijing100084 China

The application of 3D printed transparent composite ceramics with designable gain profile in solid-state lasers has garnered increasing interest. Problems including the poor performance of slurries, defects generated in the green bodies during printing and the uncontrolled densification process between ceramics with different components have deteriorated the optical quality of transparent composite ceramics prepared by direct ink writing (DIW), leading to the limitations on the realization of high-power laser outputs. To solve this problem, a systematic investigation of Nd: YAG transparent composite ceramics was conducted throughout the fabrication process, including DIW with the capability of dual-material switching, vacuum sintering and hot isostatic pressing (HIP). First, the ceramic slurries with good printability and high solids loading were formulated by adjusting the dispersant and thickener contents. The sintering behaviors of undoped YAG and Nd: YAG ceramics were investigated to enhance the optical quality of transparent composite ceramics. The Nd ions diffusion distances of the interface between undoped YAG and Nd: YAG regions in the vertical and horizontal composite ceramics were tested and calculated to be 50.1 μm and 43.5 μm, respectively. Finally, the laser measurement of the YAG/0.3 at. % Nd: YAG/YAG transparent composite ceramic with the dimension of 3 × 3 × 4 mm3 indicated that the maximum output power of 2.15 W with the slope efficiency of 40.2 % was achieved at the absorbed pump power of 5.70 W. © 2025 Elsevier Ltd and Techna Group S.r.l.

关键词： solid state lasers

来源：评论

学校读者我要写书评

暂无评论

Effect of Acid Treatment on Electrocatalytic Performance of PtNi Catalyst

引用

Chemical Research in Chinese Universities 2021年第3期37卷 686-695页

作者： GUO Ruihua QIAN Fei AN Shengli ZHANG Jieyu CHOU Kuo-Chih YE Jinyu ZHOU Zhiyou School of Materials and Metallurgy Inner Mongolia University of Science and TechnologyBaotou014010P.R.China Inner Mongolia Key Laboratory of Advanced Ceramics and Device School of Materials and MetallurgyInner Mongolia University of Science and TechnologyBaotou014010P.R.China School of Materials Science and Engineering Shanghai UniversityShanghai200072P.R.China Collaborative Innovation Center of Chemistry for Energy Materials State Key Laboratory of Physical Chemistry of Solid SurfacesCollege of Chemistry and Chemical EngineeringXiamen UniversityXiamen361005P.R.China

In this paper,we describe the synthesis of the AC-PtNi/G catalysts with graphene as the carrier,via the alcohol reduction and the sulfuric acid *** prepared catalysts were microscopically characterized by X-ray diffractometry(XRD),X-ray photoelectron spectroscopy(XPS),scanning electron microscopy(SEM),electron spectroscopy(EDAX),and transmission electron micros-copy(TEM).We tested the electrochemical performance of the prepared catalysts using an electrochemical workstation and in situ infrared spectroscopy(FTIR).The results showed that the acid-treated AC-PtNi/G catalysts had a more uniform dispersion and with the increased of treatment time,the particle size of the catalyst became *** the electrocatalytic performance of the AC-PtNi/G-48h catalyst treated with sulfuric acid for 48 h was significantly better than that of the untreated PtNi/G *** electrochemically active surface area was 76.63 m^(2)/g,and the peak current density value for catalytic oxidation of ethanol was 1218.83 A/g,which was 10 times that of ordinary commercial Pt/C *** steady-state current density value of 1100 s was 358.77 A/g,and it has excellent anti-CO toxicity *** was determined that a sulfuric acid treatment controlled catalyst particle size and increased the electrocatalytic activity of the catalytic oxidation of ethanol.

关键词： Platinum Graphene Acid treatment Particle size Electrocatalytic oxidation

来源：评论

学校读者我要写书评

暂无评论

70 Gbps PAM-4850-nm oxide-confined VCSEL without equalization and pre-emphasis

引用

Journal of Semiconductors 2024年第5期45卷 5-7页

作者： Anjin Liu Bao Tang Zhiyong Li Wanhua Zheng Key Laboratory of Optoelectronic Materials and Devices Institute of SemiconductorsChinese Academy of SciencesBeijing 100083China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China Accelink technologies co. LtdWuhan 430205China Key Laboratory of Solid-State Optoelectronics Information Technology Institute of SemiconductorsChinese Academy of SciencesBeijing 100083China

Directly modulated 850-nm vertical-cavity surface-emitting lasers(VCSELs)with the advantages of low cost,high modulation speed,good reliability,and low power consumption,are the key sources in the optical interconnects with multimode fibers for the supercomputers,data centers,and machine learning applications[1−3].Typically,non-return-tozero(NRZ)modulation format is used.

关键词： return confined fibers

来源：评论

学校读者我要写书评

暂无评论

A novel coral-like garnet for high-performance PEO-based all solid-state batteries

引用

science China materials 2022年第2期65卷 364-372页

作者： Jun Cheng Guangmei Hou Qing Sun Qiong Chen Deping Li Jianwei Li Zhen Zeng Kaikai Li Qunhui Yuan Jiajun Wang Lijie Ci State Key Laboratory of Advanced Welding and Joining School of Materials Science and EngineeringHarbin Institute of Technology(Shenzhen)Shenzhen 518055China Research Center for Carbon Nanomaterials Key Laboratory for Liquid-Solid Structural Evolution&Processing of Materials(Ministry of Education)School of Materials Science and EngineeringShandong UniversityJinan 250061China MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage School of Chemistry and Chemical EngineeringHarbin Institute of TechnologyHarbin 150001China

As one of the most promising next-generation energy storage devices,the lithium-metal battery has been extensively ***,safety issues and undesired lithium dendrite growth hinder its *** application of solid-state electrolytes has attracted increasing attention as they can solve safety issues and show great potential to inhibit the growth of lithium *** oxide(PEO)-based electrolytes are very promising due to their enhanced safety and excellent ***,they suffer from low ionic conductivity at room temperature and cannot effectively inhibit lithium dendrites at high temperatures due to the intrinsic semicrystalline properties and poor mechanical *** this work,a novel coral-like Li_(6.25)Al_(0.25)La_(3)Zr_(2)O_(12)(C-LALZO)is synthesized to serve as an active ceramic filler in *** PEO with LALZO coral(PLC)exhibits increased ionic conductivity and mechanical strength,which leads to uniform deposition/stripping of lithium *** Li symmetric cells with PLC do not cause a short circuit after cycling for 1500 h at 60℃.The assembled LiFePO_(4)/PLC/Li batteries display excellent cycling stability at both 60 and 50℃.This work reveals that the electrochemical properties of the composite electrolyte can be effectively improved by tuning the microstructure of the filler,such as the C-LALZO architecture.

关键词： coral-like garnet composite solid-state electrolyte all-solid-state battery

来源：评论

学校读者我要写书评

暂无评论

Nir-Light-Induced Plasmonic Liquid Metal/Ionic Liquid/Mxene Polyurethane Films with Excellent Antifouling and Self-Healing Properties

SSRN

引用

SSRN 2024年

作者： Wang, Peng Yuan, Haohang He, Baoluo Guo, Ruisheng Liu, Shujuan Ye, Qian Zhou, Feng Liu, Weimin State Key Laboratory of Solidification Processing Center of Advanced Lubrication and Seal Materials School of Materials Science and Engineering Northwestern Polytechnical University Xi'An710072 China State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemical Physics Chinese Academy of Sciences Lanzhou730000 China

The potential of polyurethane (PU) in engineering applications has been well-documented. Beyond possessing exceptional mechanical properties, highly sought-after PU should also demonstrate potent bactericidal effects and self-healing capabilities. Herein, a novel vinyl based ionic liquid [VEMIM+] [Cl-] (IL) was in situ polymerized and then were assembled onto the surface of liquid metal (GLM) nanodroplets to prepare GLM-IL by sonicating bulk GLM with IL. Subsequently, large-sized Ti3C2Tx (MXene) was modified with GLM-IL nanodroplets, which act as an efficient photon captor and photothermal converters and can be further composited with PU film (GLM-IL/MXene/PU). Notably, the composite film significantly increases ∼117 °C after 200 mW/cm2 light irradiation. This is attributed to the ultra-high photothermal conversion efficiency of MXene and the excellent plasma effect of GLM-IL. Compared with pure PU, the GLM-IL/MXene/PU film show 50% improvements in tensile strength and above 85.8% healing efficiency with local temperature increase. Additionally, the as-prepared GLM-IL/MXene/PU film reveals satisfactory antifouling properties (99.7% in bacterial reduction and 80.3% in microalgae reduction). Furthermore, a stretchable sensor based on the GLM-IL/MXene/PU film was constructed and evaluated, confirming its ability to stably detect small physiological signals and large movements in the human body. © 2024, The Authors. All rights reserved.

关键词： Gallium

来源：评论

学校读者我要写书评

暂无评论

Electrical switchable room-temperature magnetic skyrmions in multiferroic MXene

引用

Physical Review B 2023年第5期108卷 054440-054440页

作者： Liming Wang Yonglong Ga Peng Li Dongxing Yu Jiawei Jiang Jinghua Liang Shouguo Wang Hongxin Yang Anhui Key Laboratory of Magnetic Functional Materials and Devices School of Materials Science and Engineering Anhui University Hefei 230601 China National Laboratory of Solid State Microstructures School of Physics Collaborative Innovation Center of Advanced Microstructures Nanjing University Nanjing 210093 China Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences Ningbo 315201 China

Two-dimensional (2D) transition metal carbides and nitrides (MXene) host a plethora of interests, e.g., energy storage and conversions, and intriguing quantum phenomena ranging from electronic topological properties to superconductivity. However, topological magnetism is still a missing piece in MXenes. Here, via first-principles calculations, we validate the existence of significant Dzyaloshinskii–Moriya interaction (DMI) in 2D multiferroic MXenes, where the magnitude of DMI scales with the strength of electric dipole of the MXenes. Moreover, using atomistic spin model simulations, we demonstrate that room-temperature (RT) magnetic skyrmions can be spontaneously stabilized at monolayer Co2CF2. The chirality of DMI can be tuned via ferroelectricity effect and, consequently, the skyrmions. We further show that a proper van der Waals substrate can effectively enhance the magnetic anisotropy of Co2CF2 through interlayer charge transfer, while the tunable DMI and RT skyrmions can also be maintained. These results prove that MXenes and their heterostructure can be promising candidates in fabricating ultrathin skyrmionic devices and pave the way for the RT electrically controllable skyrmions toward spintronic applications.

关键词： Dzyaloshinskii-Moriya interaction Skyrmions 2-dimensional systems MAX phase compounds Multiferroics

来源：评论

学校读者我要写书评

暂无评论

High thermoelectric performance in metallic NiAu alloys

arXiv

引用

arXiv 2023年

作者： Garmroudi, Fabian Parzer, Michael Riss, Alexander Bourgès, Cédric Khmelevskyi, Sergii Mori, Takao Bauer, Ernst Pustogow, Andrej Institute of Solid State Physics TU Wien Vienna1040 Austria National Institute for Materials Science Tsukuba Japan Research Center for the Computational Materials Science and Engineering TU Wien Vienna1040 Austria National Institute for Materials Science Tsukuba Japan Graduate School of Pure and Applied Sciences University of Tsukuba Tsukuba Japan

Thermoelectric (TE) materials seamlessly convert thermal into electrical energy and vice versa, making them promising for applications such as power generation or cooling. Although historically the TE effect was first discovered in metals, state-of-the-art research mainly focuses on doped semiconductors with large figure of merit, zT, that determines the conversion efficiency of TE devices. While metallic alloys have superior functional properties, such as high ductility and mechanical strength, they have mostly been discarded from investigation in the past due to their small Seebeck effect. Here, we realize unprecedented TE performance in metals by tuning the energy-dependent electronic scattering. Based on our theoretical predictions, we identify binary NiAu alloys as promising candidate materials and experimentally discover colossal power factors up to 34 mWm−1K−2 (on average 30 mWm−1K−2 from 300 to 1100 K), which is more than twice larger than in any known bulk material above room temperature. This system reaches a zT up to 0.5, setting a new world record value for metals. NiAu alloys are not only orders of magnitude more conductive than heavily doped semiconductors, but also have large Seebeck coefficients originating from an inherently different physical mechanism: within the Au s band conduction electrons are highly mobile while holes are scattered into more localized Ni d states, yielding a strongly energy-dependent carrier mobility. Our work challenges the common belief that good metals are bad thermoelectrics and presents an auspicious paradigm for achieving high TE performance in metallic alloys through engineering electron-hole selective s–d scattering. Copyright © 2023, The Authors. All rights reserved.

关键词： Gold alloys

来源：评论

学校读者我要写书评

暂无评论

Optoelectronic properties of nanotubes based on tungsten disulfide

Optoelectronic properties of nanotubes based on tungsten dis...

引用

2022 IEEE Photonics Society Summer Topicals Meeting Series, SUM 2022

作者： Paukov, Maksim I. Goldt, Anastasia E. Komandin, Gennady A. Syuy, Alexander V. Yakubovskiy, Dmitriy I. Polyakov, Alexander Y. Tenne, Reshef Zak, Alla Novikov, Sergey Nasibulin, Albert G. Arsenin, Alexey V. Volkov, Valentin Burdanova, Maria G. Center for Photonics and 2D Materials Moscow Institute of Physics and Technology Dolgoprudny Russia Skolkovo Institute of Science and Technology Moscow Russia Prokhorov General Physics Institute Russian Academy of Science Moscow Russia Department of Physics Chalmers University of Technology Gothenburg Sweden Weizmann Institute of Science Department of Molecular Chemistry and Materials Science Rehovot Israel Faculty of Science Holon Institute of Technology Holon Israel School of Chemical Engineering Aalto University Espoo Finland Institute of Solid State Physics Russian Academy of Sciences Chernogolovka Russia

Inorganic nanotubes (NT), such as WS2NT, have unique properties making them promising candidates for op-toelectronic devices. Herein, we performed optical absorption, Raman, and time-domain terahertz spectroscopy of W... 详细信息

ISBN: (数字)9781665434898

ISBN: (纸本)9781665434898

关键词： Light absorption

来源：评论

学校读者我要写书评

暂无评论

Intrinsic Electronic Properties of BN Encapsulated, van der Waals Contacted MoSe2 FETs

arXiv

引用

arXiv 2023年

作者： Shao, Yinjiang Zhou, Jian Xu, Ning Chen, Jian Watanabe, Kenji Taniguchi, Takashi Shi, Yi Li, Songlin School of Electronic Science and Engineering National Laboratory of Solid-State Microstructures Collaborative Innovation Center of Advanced Microstructures Nanjing University Nanjing210023 China National Institute for Materials Science Ibaraki Tsukuba305-0044 Japan

Two-dimensional (2D) semiconductors have attracted considerable interest for their unique physical properties. Here, we report the intrinsic cryogenic electronic transport properties in few-layer MoSe2 field-effect transistors (FETs) that are simultaneously van der Waals contacted with gold electrodes and are fully encapsulated in ultraclean hexagonal boron nitride dielectrics. The FETs exhibit electronically favorable channel/dielectric interfaces with low densities of interfacial traps (10 cm-2), which lead to outstanding device characteristics at room temperature, including a near-Boltzmann-limit subthreshold swings (65 mV/dec), a high carrier mobility (68 cm2 V−1 s−1), and a negligible scanning hysteresis (2. The results provide insightful information on the device physics in van der Waals contacted and encapsulated 2D FETs. © 2023, CC BY-NC-SA.

关键词： Field effect transistors

来源：评论

学校读者我要写书评

暂无评论

A-site doped LaFeO3 perovskite for highly active O3 catalytic decomposition

引用

materials Today Communications 2024年 40卷

作者： Guan, Jian Lu, Lingling Guo, Yacong Fan, Guijun Yu, Hang Zhu, Qiuyi Ma, Guojun Han, Ning Chen, Yunfa Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences Beijing100049 China State Key Laboratory of Mesoscience and Engineering Institute of Process Engineering Chinese Academy of Sciences Beijing100190 China Key Laboratory of Science and Technology on Particle Materials Institute of Process Engineering Chinese Academy of Sciences Beijing100190 China Key Laboratory for Mechanics in Fluid Solid Coupling Systems Institute of Mechanics Chinese Academy of Sciences Beijing100190 China

Nowadays, the treatment of ozone has become critically important due to the health risks caused by even minimal amount of ozone in the ambient air. In this work, LaFeO3 doped with Mg, Ca, Sr and Ce on A-site are synthesized by sol-gel method and adopted as a highly active ozone decomposition catalyst. The results show that the Ce doped LaFeO3 exhibits the highest catalytic activity with the optimal doping concentration marked as La0.5Ce0.5FeO3. It reaches high conversion efficiency of 97 % and 90 % to 1000 ppm ozone at high weight hourly space velocity of 720,000 and 1440,000 mL g−1 h−1, which is one of the highest in the literature. The distortion of [FeO6] octahedra reached the maximum when the doping amount of Ce was 0.5 as revealed by X-ray diffraction and Rietveld fitting. The high ozone catalytic activity could be assigned to the easy electron loss from eg orbit caused by high crystal field splitting energy, abundant oxygen vacancies resulting from the biggest distortion of [FeO6] octahedra and quick transfer between Fe2+ and Fe3+. © 2024

关键词： Ozone

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：