化学法制备石墨烯基透明导电薄膜的研究进展

石墨烯作为一种新型的二维纳米材料,具有优异的透光率和导电性。与传统的铟锡氧化物(ITO)相比,石墨烯具有更高的导电性、较好的柔韧性和丰富的资源,因此石墨烯在透明导电薄膜领域有着较好的应用前景。主要对国内外近3年来化学法制备石墨烯基透明导电薄膜的最新研究成果进行综述。并以成膜方法的不同为区分,重点介绍了真空抽滤法、旋涂法、自组装、Langmuir-Blodgett(LB)法、喷涂法制备石墨烯基透明导电薄膜的最新研究成果。同时,对薄膜的硝酸处理、掺杂进行了介绍。最后,就目前化学法制备石墨烯基透明导电薄膜所面临的问题进行了讨论,并对石墨烯透明导电薄膜的未来发展进行了展望。     

还原氧化石墨烯基纳米银线透明导电薄膜研究进展

透明导电薄膜已广泛应用于印刷电子领域,传统的透明导电薄膜氧化铟锡（ITO）因其高脆性低柔韧性而不能满足高速发展的柔性电子行业;纳米银线（AgNWs）和石墨烯均具有良好光学性能、导电性能以及机械性能,使其能成为制备透明导电薄膜的理想材料。综述了近年来还原氧化石墨烯（rGO）基AgNWs透明导电薄膜的研究进展。介绍了柔性导电薄膜的关键参数及rGO/AgNWs透明导电薄膜的成膜工艺;归纳了影响rGO/AgNWs透明导电薄膜光电性能的主要因素和相关研究;阐述了rGO/AgNWs透明导电薄膜在印刷电子领域的应用现状,并展望了rGO/AgNWs透明导电薄膜的未来发展趋势。     

石墨烯透明导电薄膜技术的专利分析

以Innography专利数据库收录的全球石墨烯透明薄膜技术领域的专利文献为研究对象,通过对专利申请的年度变化、国家、专利权人、专利发明人和国际专利分类号等内容的分析,揭示石墨烯透明导电薄膜技术的发展现状与趋势,为我国石墨烯透明导电薄膜领域的技术创新和战略发展提供参考。     

石墨烯透明导电薄膜可控制备及实用性研究

新型二维材料石墨烯,因其优异特性被认为是众多领域的理想新型功能材料,其产业化应用是当前及未来的重要研究课题之一。综述了针对性提高石墨烯导电薄膜透光率和导电性能的可控制备的最新研究进展,包括可控制备大尺寸、大面积石墨烯,以及通过掺杂或与其他材料形成复合材料等方法有效提高石墨烯薄膜的光电性能,并对石墨烯透明导电薄膜电极在触摸屏、显示屏等的实用化应用进行了探讨和展望。     

液面沉积法制备透明柔性石墨烯导电薄膜

透明导电薄膜在现代电子领域有着非常广泛的应用。我们利用简单的液面沉积法在柔性基底PET上成功制备了氧化石墨烯薄膜,在室温下经过碘化氢(HI)蒸汽还原后得到石墨烯透明导电薄膜。利用各种表征手段(SEM、TEM、AFM、吸收光谱(UV-Vis)和电阻分析(四探针法))系统的研究了不同沉积层数的石墨烯薄膜的透光性和导电性之间的关系:随着石墨烯沉积层数的增加,导电薄膜的导电性上升,但薄膜的透光率下降。在透光率(λ=550nm)为82.22%时,导电薄膜的方块电阻为620Ω/□。     

石墨烯散热薄膜研究进展（英文）

由于石墨烯具有优异的导热与导电性能,已被认为是最理想的散热材料之一,受到学术界与产业界的广泛关注。在本综述中,我们总结了石墨烯薄膜在热管理领域的研究现状,介绍了还原氧化石墨烯薄膜,机械剥离石墨烯薄膜以及石墨烯基复合薄膜的制备及其应用性能。进一步地,对石墨烯薄膜在导热、导电应用过程中的关键因素进行分析,总结石墨烯薄膜在散热领域未来实现产业化应用所面临的挑战。     

基于石墨烯透明导电薄膜的智能调光膜

<正>一、大面积低成本生产的石墨烯透明导电薄膜石墨烯作为一种有着特殊性能的材料,目前已应用于透明导电电极、触控屏、太阳能电池、锂电池、超级电容器、导热薄膜、海水淡化、环境污染治理等领域(见图1),被人们寄予了厚望。欧盟于2013年初启动的超大规模石墨烯旗舰计划中,透明导电膜研究是其中的重要内容之一。与此同时,许多世界级企业如美国IBM、德国BASF、韩国三星等纷纷投入巨资开展石墨烯透     

磁控溅射镍膜催化生长石墨烯及迁移表征

在Si/SiO2衬底上将磁控溅射镍膜作为催化剂,利用化学气相沉积制备了大面积连续的石墨烯薄膜,得到的石墨烯为1～15层.将石墨烯薄膜迁移到玻璃衬底和Si/SiO2衬底上,测量了薄膜的可见光透过率和薄膜电阻,并讨论了石墨烯作为透明导电电极在光电器件上的应用.     

纳米材料

正大面积单晶石墨烯薄膜快速制备技术取得突破据报道,近期,北京市科技计划课题"大面积单晶石墨烯薄膜快速制备技术研究"验收通过专家组验收。石墨烯材料性质优异,可用于构筑高性能微纳电子器件和柔性透明导电薄膜,同时也能作为优异的支撑、封装和阻隔材料。大面积高质量的石墨烯薄膜是这些高端应用的材料基础。作为制备大面积高质量石墨烯薄膜材料的首选方法,化学气相沉积法制备的石墨烯薄膜存在畴区尺寸小、晶界和缺陷密度高、大     

透明导电薄膜材料的研发态势

简述了透明导电薄膜材料的研究现状与发展趋势，特别是对目前研究比较活跃的透明导电氧化物(TCO)及金属基复合多层透明导电膜的研究动态，材料设计原理及其应用进行了重点介绍，并就透明导电薄膜材料目前存在的问题及发展方向进行了分析讨论。     

Insertion of triangulated surfaces into a meccano tetrahedral discretization by means of mesh refinement and optimization procedures

In this paper, we present a new method for inserting several triangulated surfaces into an existing tetrahedral mesh generated by the meccano method. The result is a conformal mesh where each inserted surface is approximated by a set of faces of the final tetrahedral mesh. First, the tetrahedral mesh is refined around the inserted surfaces to capture their geometric features. Second, each immersed surface is approximated by a set of faces from the tetrahedral mesh. Third, following a novel approach, the nodes of the approximated surfaces are mapped to the corresponding immersed surface. Fourth, we untangle and smooth the mesh by optimizing a regularized shape distortion measure for tetrahedral elements in which we move all the nodes of the mesh, restricting the movement of the edge and surface nodes along the corresponding entity they belong to. The refining process allows approximating the immersed surface for any initial meccano tetrahedral mesh. Moreover, the proposed projection method avoids computational expensive geometric projections. Finally, the applied simultaneous untangling and smoothing process delivers a high‐quality mesh and ensures that the immersed surfaces are interpolated. Several examples are presented to assess the properties of the proposed method.     

Certification Institutions Expected to Update and Transfer Information on Present Standards

Standards are the basis for production enterprises to organize production, ex-factory inspection, trade (delivery) and technical exchanges, product certification, quality arbitration and supervision.……     

Flow calorimeter for enthalpy increment measurements on condensed gases

A flow calorimeter for enthalpy increment measurements on condensed gases is presented. A better knowledge of the properties of the liquefied natural gas is needed, and therefore a liquid loop has been designed for our flow calorimeter. The fluid loop in the calorimeter is designed in order to avoid the two-phase region, since two phases would give compositional disturbances in the measurements. The avoidance of the two-phase region is made possible by increasing the pressure of the test fluid after the measurement section, then heating the fluid at super-critical pressure past the critical point. Finally, the fluid is throttled to the low-pressure gas state at the inlet condition of the compressor that circulates the fluid. To perform the pressure increase, a new cryogenic pump has been designed. To evaluate the new equipment, measurements were taken on liquid ethane over the temperature range 146–256 K at pressure between 0.9 and 5.1 MPa.     

From Industry 4.0 to Research 4.0. Development of High Performance Fibers in the Light of Digitization

We associate a variety of innovations with the term ＂Industry 4.0＂. The pioneer of many 4.0 modifications forms the basisfor the trend towards the integrated di...     

Refrigerators Enter a New Era of Health Preservation Frestech initiates the establishment of China's first standard for household sterilization refrigerators

On November 30, 2007, the China Association for Standardization (CAS) held a press conference at Beijing Diaoyutai State Guest House. Leaders from the China Household Electric Appliance Research Institute, the China Household Electric Appliance Association, and the China Consumers' Association attended and made speeches.……     

Optimum-Simulation von Ernteprozessen

Zusammenfassung Bei der Gestaltung von Ernteprozessen — beispielsweise des Prozesses Mähdrusch, Körnertransport und -abnahme — als transportverbundene Fließarbeitsverfahren mit mindestens zwei verschiedenen Arbeitsmitteln gibt es einen großen Optimierungsspielraum. Solche Prozesse sind mehrstufige Bedienungsprozesse mit gemischter Anordnung der Bedienungseinrichtungen. Außerdem besitzen sie stark ausgeprägte räumliche Aspekte. Es wird vor allem gezeigt, welche Merkmale solcher Prozesse in Simulationsmodellen abgebildet sein müssen, welche Zielgrößen in Abhängigkeit von welchen Einflußgrößen unter Berücksichtigung welcher Prozeßbedingungen ermittelt werden sollten und wie der Bewertungsprozeß zur Ermittlung der gewünschten Informationen gestaltet werden muß.     

Roman iron and steel: A review

ABSTRACT

The production of ferrous metal increased during the Roman Late Republican period, Principate and Empire. The direct bloomery process was used to extract the metal from its ores using slag-tapping and slag-pit furnaces. The fuel was charcoal and an air blast was introduced by bellows-operated tuyères. Iron formed as a bloom, often as a spongy mass of metal, which contained impurities from the smelting process, including unreacted ore, fuel, slag and fragments from the furnace walls, while the metal was often inhomogeneous with varied carbon contents. Blooms were either smithed directly into bars or ingots or they were broken up, which also allowed the removal of gross impurities and a selection of pieces with similar properties to be made. These could then be forge-welded together and formed into characteristically shaped ingots. Making steel in the furnace seems to have been achieved: it depended on the ore and the furnace and conditions within it. Surface carburization was also carried out. Iron and steel were used extensively in construction and for tools and weapons. Fire welding was often used to add pieces of steel to make the edges of tools and weapons, which could be heat-treated by quenching to harden them.     

A study of centrifugal cast high boron high speed steel

In the present study a high‐boron high speed steel (HSS) roll material was designed. Many expensive alloy elements have been substituted by cheap boron alloy, and high‐boron high speed steel roll has been manufactured by centrifugal casting method. The microstructures, mechanical properties and wear resistance of centrifugal casting high‐boron high speed steel roll have been investigated by optical microscopy (OM), scanning electron microscopy (SEM), and X‐ray diffraction (XRD) analysis, hardness test, impact test and wear test. The results indicated that the solidification microstructures of high‐boron high speed steel roll consisted of M₂(B,C), (W,Mo)₂(B,C), M₃(B,C), M₂₃(B,C)₆ type borocarbides and martensite, a small amount of retained austenite. Borocarbides were continuously distributed over the grain boundary. After quenching from 1050 °C, local broken network appeared in partial borocarbides, and fine secondary borocarbide precipitated from the matrix. After tempering from 525 °C, the amount of precipitated borocarbide increased significantly. After heat treatment, the hardness of high‐boron high speed steel roll excelled 60 HRC, and its impact toughness excelled 8.0 J/cm². The single groove steel rolling amount of high‐boron high speed steel rolls increases by 500% than that of bainite cast iron roll, when the rolls are used in K₁ mill housing of bar mill.     

Brainstorming for ISO Strategy 2016-2020

正Responding to ISO’s appeal for survey for the to-be-developed ISO Strategy Plan for 2016-2020,SAC hosted a special workshop over the needs and comments of various fi elds on June 8 in Beijing.The workshop was attended by ISO President-elect and Ansteel General Manager Zhang Xiaogang,SAC Vice-Administrator Yu Xinli,and 30 experts from