我国首次合成纳米级金刚石晶体薄膜

深圳市雷地科技实业有限公司在常温下生产的金刚石膜是国际上首次发现的纳米级金刚石材料,这是我国新材料领域的重大突破,这一成果将使金刚石膜材料的应用前景更加广阔。 纳米级金刚石晶体膜除具有金刚石的高硬度、化学惰性等优良性能外,还具有自然清洁、自然灭菌、耐磨损、冷阴极场发射及阻隔热辐射等纳米材料性     

类金刚石膜研究进展

类金刚石膜具有高硬度、高热导率、低摩擦因数、良好的耐磨性能和化学惰性等优异的物化性能,在热沉、微电子、抗核加固、生物和汽车工业等领域具有重大的应用前景,近年来吸引了众多研究和关注。文章综述了类金刚石膜的研究进展和膜的成核机理,展示了类金刚石的应用前景,为该材料的研究和工业化应用提供思路和参考。     

我国首次合成纳米级金刚石晶体薄膜

香港城市大学国际首家“超金刚石及先进膜研究中心”检测发现 ,深圳市雷地科技实业有限公司在常温下生产的金刚石膜是国际上首次发现的纳米级金刚石材料 ,这是我国新材料领域的重大突破 ,这一成果将使金刚石膜材料的应用前景更加广阔。纳米级金刚石晶体膜除具有金刚石的高硬度、化学惰性等优良性能外 ,还具有自然清洁、自然灭菌、耐磨损、冷阴极场发射及阻隔热辐射等纳米材料性能 ,应用这一新材料将成功推出最新的高科技产品——场发射平面显示器 ,其清晰度将比目前显示技术提高数千倍。用这种材料生产建筑玻璃 ,具有很好的自然清洁和隔热节…     

金刚石薄膜场发射特性研究现状

金刚石薄膜具有负电子亲合能、高热导率和极强的化学惰性等优势，作为场发射材料引起了广泛关注。回顾了金刚石薄膜的分类，介绍了氢化金刚石薄膜具有的负电子亲合能特性，分析了金刚石薄膜场发射特性的影响因素，列举了场发射特性的优化方向，并总结了文献中报道的金刚石薄膜与其他材料复合获得的场发射阴极的性能，对于分析和改进金刚石薄膜器件场发射性能具有重要意义。     

宁波材料所金属掺杂DLC复合薄膜材料体系研究取得系列进展

正类金刚石薄膜材料(diamond-like carbon,简称DLC)作为一类非晶碳膜材料的统称,主要由sp3键(金刚石相)和sp2键(石墨相)的三维交叉网络混合而成,依制备方法不同可含有一定量氢,具有高硬度、低摩擦系数、高红外透光性、良好化学惰性和生物相容性等诸多优异性能,在海洋、航空航天、生物医用、微机电、汽车等领域具有广阔应用前景。     

金刚石薄膜研究的进展

一、概况金刚石墨膜可以充分发挥金刚石优异的性能,可广泛应用于力学、热学、电子学、光学等多项尖端技术领域,如刀具、集成电路和激光的散热片,红外窗口、高温半导体等,是一种很有发展前途的新型的功能材料。由于在许多不同材料上可以以气相沉积金刚石薄膜,这种涂覆技术的进展更激起了大家的兴趣,具有各种形态和不同物理性质的金刚石薄膜已经获得成功,在某些情况下,已经确定了生产金刚石涂层零件的技术     

镁合金表面类金刚石膜的研究进展

类金刚石碳（DLC）膜具有高硬度、低摩擦系数、强化学惰性及生物相容性好等优异性能，镁合金表面制备DLC膜可极大地改善基体的使用性能。综述了采用不同制备技术在镁基体表面获得的多种DLC膜系的抗磨损及耐腐蚀性能，并展望了DLC膜表面改性镁合金的医用前景，指出镁合金表面制备DLC膜是其表面改性技术中具有前景的一个研究方向。     

三种生物碳素材料表面的血小板粘附研究

介绍了生物碳素材料的血液相容性的研究概况 ,研究了血小板在石墨、金刚石膜和类金刚石膜材料表面的粘附行为 ,结果表明 ,血小板粘附后的形态指数大小为 :石墨 >金刚石膜 >类金刚石膜。从一定角度定性地得出 :类金刚石膜的血液相容性优于金刚石膜 ,金刚石膜的血液相容性优于石墨     

刀具涂层材料的使用概况

综述了目前常用的刀具涂层材料及其性能特点，着重介绍三元复合膜，金刚石膜，ｃ－ＢＮ膜以及固体润滑膜等新型膜材料的性能特点以及它们在刀具表面的应用情况。     

非晶金刚石膜在口腔医学材料中的应用

采用带过滤的阴极真空等离子电弧镀膜技术,对口腔牙用聚甲基丙烯酸甲酯(PMMA)树脂及纯钛材料进行了表面镀覆非晶金刚石膜的改性处理,获得了镀覆非晶金刚石膜的PMMA树脂和镀覆非晶金刚石膜的纯钛口腔牙用材料。通过细胞培养和动物实验,考察了非晶金刚石膜的生物相容性。采用HA-1型涂层附着力划痕试验仪研究了非晶金刚石膜与PMMA树脂和与纯钛的结合力及镀覆非晶金刚石膜PMMA树脂和镀覆非晶金刚石膜纯钛的耐磨性能。在人工唾液中模拟口腔环境进行电化学分析测试了镀覆非晶金刚石膜纯钛材料的耐腐蚀性能。借助SEM观察了镀覆非晶金刚石膜纯钛材料的表面形貌。实验结果显示:非晶金刚石膜细胞毒性评级为0级,溶血率为3.08%,短期全身毒性试验为阴性;PMMA树脂经极化预处理后可镀覆结合力为(10.86±0.79)N的非晶金刚石膜;镀覆非晶金刚石膜纯钛表面自腐蚀电位和过钝化电位正移。表明非晶金刚石膜作为生物材料,其生物安全性、耐腐蚀性及镀膜结合强度达到口腔医用材料的要求。     

PVC个性人像证卡打印片的研制

证卡产品涉及公安、银行、社保、电信、旅游、购物消费等各行业,是国家金卡工程的重要成果。由天津海华科技发展有限公司研制开发成功的PVC个性人像证卡打印片,是一种防水性好,适于喷墨打印和数字印刷的新型制卡材料。本文介绍了该产品的研制情况,详细阐述了其研制技术路线、技术特点、研制结果及国内同类产品的对比结果。证卡打印片打印性能和物理性能接近或达到国际同类产品水平,填补了国家空白。     

Thin film deposition for permeability increase of gas being implanted (theoretical consideration)

A theoretical model has been developed for diffusive permeation of gas injected by ion bombardment through thin metallic targets, including membranes with thin films deposited onto the surface. The film material differs from the substrate material. Calculations for gas atom distribution in the film and substrate have been carried out, as well as gas fluxes to the source and sink sides in such a system in a quasi-stationary régime. The possibility of a permeability increase is revealed under implantation of gas ions both with low (～ keV) and higher energies (of the order of tens of keV) by deposition onto an irradiated target surface having a film of material with a lower diffusion coefficient for the gas being implanted than the substrate material itself. It has been shown that the most significant effect may be obtained under relatively high energy implantation for deposited film thicknesses markedly less than the mean ion range, and where the film permeability (diffusion coefficient and/or gas solubility) is much smaller than that of the substrate material itself. Periodic or simultaneous with implantation film renewal on the target surface has been suggested to compensate for sputtering.     

Processing of graphene nanoribbon based hybrid composite for electromagnetic shielding

The advent of graphene heralded by the recent studies on carbon based conducting polymer composites has been a motivation for the use of graphene as an electromagnetic interference (EMI) shielding material. One of the variants of graphene, graphene nanoribbon (GNR) shows remarkably different properties from graphene. The EMI shielding effectiveness of the composite material mainly depends on fillers’ intrinsic conductivity, dielectric constant and aspect ratio. We have synthesized graphene nanoribbon (GNR) – Polyaniline (PANI) – epoxy composite film for effective shielding material in the X-band frequency range of 8.2–12.4 (GHz). We have performed detailed studies of the EMI shielding effect and the performance of the composite and found that the composite shows ∼−40 dB shielding which is sufficient to shield more than 95% of the EM waves in X Band. We checked the shielding effectiveness of the composite film by varying the GNR percentage and the thickness of the film. The strength properties of the synthesized composited were also studied with a aim to have a material having both high strength and EMI shielding properties.     

钛酸锶钡(BST)薄膜的组成、结构与性能研究进展

钛酸锶钡 (BST)薄膜是一种重要的铁电薄膜 ,应用广泛 ,是高新技术研究的前沿和热点之一。简要介绍了BST薄膜的制备方法和应用 ,对此薄膜的基片、电极、晶界、界面、热处理、膜厚及组成、结构、性能等方面作了重点讨论 ,提出了研究中需要解决的一些问题     

铁电材料介电非线性研究进展

铁电材料是一类重要的功能材料,介电(电压)非线性是近年来高新技术研究的前沿和热点之一.综述了关于铁电材料介电非线性的临界尺寸、晶粒尺寸效应、膜厚效应、模型和介质移相器等方面的最新研究进展,提出了研究中需要解决的一些问题.     

可食性绿色包装膜的研究进展

目的 探索“智慧课堂”教学模式对高校专业课程教学改革与人才培养的影响。方法 以《食品添加剂》课程教学为例,分析了传统课程教学的现状与存在问题,探讨了将智慧树运营服务平台应用于课程教学的方法,提出“智慧课堂”教学的优势所在和总体思路,并对其解决方法予以阐述,还通过调查问卷对教学改革结果予以反馈。结果 61.9%的调查对象认为通过“智慧课堂”教学方式能获得问题分析能力的提升;58.73%的调查对象认为能获得总结凝练与自主学习能力的提升;52.38%的调查对象更乐意采用线上线下混合式教学;57.14%的调查对象觉得《食品添加剂》课程分值分配比例很合理,并有61.9%受访者表示非常乐意接受该教学模式。结论 实践证明,“智慧课堂”教学模式能提高学生对课程学习的兴趣和主动性,达到理论学习与人才培养的双重目标,值得应用推广。     

可食性大豆分离蛋白膜的制备及其性能研究

目的 论述可食性绿色包装膜的种类、技术及其研究进展,为该类材料的开发和应用提供有力的技术支持和科学依据。方法 以可食性膜材料为研究对象,分别对可食性多糖膜、可食性蛋白质膜、可食性脂质膜、可食性复合薄膜的种类、性能、制备方法及在包装的应用现状进行分析。结果 对可食性绿色包装膜开发和性能的研究越来越深入,并已取得了一些成果,但仍存在性能缺陷,因而限制了其广泛应用。结论 可食性绿色包装膜的研究和应用是世界食品科技发展的重要方向,目前从材料的研发到实际应用于包装中仍需大量的实验和分析。开发性能优异且对自然环境和人体健康无害的可食性薄膜材料,不仅符合包装材料研究的主要趋势,且具有广阔的应用前景和市场价值。     

氟化类金刚石膜结构、性能及应用

氟化类金刚石膜是基于传统类金刚石膜的基础上发展起来的一种改性材料,该膜具有许多良好的性能,包括疏水性能、电学性能、光学性能、机械性能、热稳定性以及生物相容性,因此引起了人们的极大关注.本文介绍了氟化类金刚石膜的结构、性能、应用领域和发展趋势.     

High roughness Ag back reflector on a metal underlayer for thin film solar cell applications

The roughness development of Ag film was investigated for potential as a back reflector material in thin film solar cells on flexible stainless steel (STS) substrates. The influence of metal underlayers was evaluated in order to obtain a rough Ag film at a low deposition temperature (≤400 °C). By depositing Ag on a 100 nm Al underlayer to induce Ag–Al alloying, the film roughness was increased three times more than that of Ag films on bare STS at 400 °C. The Ag film deposited on an Al underlayer at 350 °C exhibited 75 nm roughness and uniformly distributed crystallites, which was effective for visible light scattering. The Ag–Al alloy phase was also controlled using the thickness ratio of Ag and Al. The present work clearly demonstrated that an Ag back reflector film with a higher roughness could be fabricated through inserting a metal underlayer at a deposition temperature much lower than the 500 °C that has been reported in earlier works.     

Thin‐Film Transistors

Thin‐film transistors (TFTs) matured later than silicon integrated circuits, but in the past 15 years the technology has grown into a huge industry based on display applications, with amorphous and polycrystalline silicon as the incumbent technology. Recently, an intense search has developed for new materials and new fabrication techniques that can improve the performance, lower manufacturing cost, and enable new functionality. There are now many new options – organic semiconductor (OSCs), metal oxides, nanowires, printing technology as well as thin‐film silicon materials with new properties. All of the new materials have something to offer but none is entirely without technical problems.