水溶性薄膜收卷过程中的张力控制

基于水溶性薄膜的一系列特性及生产要求,对其进行张力分析,并介绍了相应的张力控制特点,以实现生产过程中张力稳定控制.     

自持金刚石厚膜上沉积ZnO薄膜的研究

ZnO/金刚石结构的表面声学波滤波器的性能主要取决于沉积ZnO薄膜的质量.本文用金属有机化合物气相沉积两步生长法在自持化学气相沉积金刚石厚膜的成核面上制备了ZnO薄膜,并用X射线衍射谱,扫描电子显微镜和室温光荧光谱对薄膜质量进行了表征.结果表明得到的ZnO薄膜取向一致,表面较均匀,光学质量良好.     

a-Si:H薄膜结构对多晶硅薄膜性能的影响

用a一Si:H薄膜经退火晶化成的多晶硅薄膜,其晶化温度、晶粒尺寸和电性能与薄膜的初始结构有密切关系,而a-Si:H薄膜的初始结构依赖于沉积条件.用PCVD方法高速沉积的a-Si:H薄膜,经550℃的低温退火,可以制备平均晶粒尺寸为几百nn,最大晶粒尺寸为2μ,电导率为1.62(Ω·on)-1的优质多晶硅薄膜.     

通过氧化Cu膜制备Cu_2O薄膜

通过热蒸镀Cu膜并在空气中退火制备Cu2O薄膜,利用X射线衍射(XRD)、能量分散X射线谱(EDX)和原子力显微镜(AFM)研究了已沉积和不同温度退火薄膜的晶体结构、成份和表面形貌。结果表明,Cu膜在200℃退火30分钟可以得到具有单一成份的Cu2O薄膜。四探针测量得到所制备的Cu2O薄膜电阻率为0.22Ωcm。用紫外可见光分光光度计(UV-vis)研究了Cu2O薄膜的光学特性,得出其光学带隙为2.4eV。     

Optimization of the Electrical Performance of Polymeric Films

In the present study, an attempt is made to optimize the electrical performance of the thin polymeric films through optimization techniques. The study is conducted in two phases: (1) laboratory experiments and (2) through numerical optimization. For laboratory analysis, thin and transparent films are prepared using polyethersulfone (PES) as host material and meta-nitroaniline (MNA) as guest materials. A set of nine film samples are prepared by the solution casting method in the laboratory using different concentrations of MNA. The electrical properties capacitance, conductance, and dissipation factor of films are measured by Aligent Impedance Analyzer. These characteristics are then optimized mathematically. For this purpose, initially single-objectives are considered for optimizing the electrical properties individually, and later a multiobjective model is considered for analyzing the properties simultaneously. The algorithms employed are metaheuristics: genetic algorithms, particle swarm optimization, differential evolution, and its variant modified differential evolution along with fmincon (a MATLAB toolbox) for single-objective optimization and multiobjective differential evolution algorithm and nondominated sorting genetic algorithm-II for multiobjective optimization.     

Determination of the Thermal Diffusivity of Edible Films

One of the most important factors in the preparation of edible films regards the choice of ingredients. Edible films are commonly prepared with single or mixed high-molecular-weight compounds like proteins and gums. In the present work, protein and gum-based edible films were prepared and their thermal diffusivity determined by photoacoustics. The films were prepared with different concentrations of four basic ingredients: whey protein concentrate, mesquite gum, sodium alginate, and -carrageenan. In single-component films, the highest thermal diffusivity was found in mesquite gum (1.97×10^–7m²s^–1), followed by sodium alginate, whey protein concentrate, and -carrageenan samples. In composed films, the highest thermal diffusivity was obtained in a ternary film made of mesquite gum, whey protein concentrate, and sodium alginate in identical parts (5.20×10^–7m²s^–1).     

TiO2薄膜发展现状及APCVD制备掺氮TiO2性能研究

概述了TiO2的国内外发展现状,从原理、改性等方面详细介绍了TiO2的光催化特性,并对TiO2的制备方法进行了总结概括.用APCVD法所做的气体流量系列掺氮TiO2样品进行测试分析发现,氮已经掺入TiO2中,氮的掺杂改善了薄膜表面的亲水性能.     

气凝胶薄膜制备的研究进展

气凝胶薄膜作为一种具有独特特性的薄膜材料,在光学、热学、声学、微电子等领域受到广泛关注。概述了气凝胶薄膜的溶胶制备和溶胶镀膜制备工艺,对比了气凝胶溶胶的酸催化、碱催化和酸碱两步催化等制备方法;介绍了浸渍提拉法、旋转镀膜法等溶胶镀膜方法;综述了溶胶制备和镀膜等工艺条件对气凝胶薄膜结构和性能的影响及其研究进展,指出酸碱两步法和金属等杂化是提高气凝胶薄膜性能的有效途径;最后展望了气凝胶薄膜材料的发展和应用前景。     

双层预制膜对CIGS薄膜结构和形貌的影响

采用中频交流磁控溅射方法,在玻璃基底上依次沉积了Mo、CuIn、CuGa薄膜,制备了CuInGa（CIG）双层预制膜,采用固态硒化法制备获得了Cu（In1-xGax）Se2（CIGS）吸收层薄膜,考察了CuGa层制备过程中工作气压的改变,对CIGS薄膜结构和形貌的影响。采用SEM和EDS观察和分析了薄膜的表面形貌和成分,采用XRD表征了薄膜的组织结构。结果表明,改变溅射制备CuGa层的工作气压,所获得的CIG双层预制膜均由Cu11In9、CuIn和CuGa组成。在溅射制备CuGa层的工作气压为1．0Pa的条件下所获得的CIG双层预制膜经过硒化后,获得的CIGS薄膜致密。采用不同结构的双层预制膜,在不同的硒化时间下制备的CIGS薄膜,均具有黄铜矿相结构,薄膜具有（112）面的择优取向。     

碳气凝胶薄膜制备研究进展

简介了碳气凝胶材料的物理化学性质,阐述了碳气凝胶及其薄膜的潜在应用,综述了碳气凝胶薄膜的制备现状.联系结构特征,分析了影响碳气凝胶膜化制备的主要因素.对比无机气凝胶薄膜,提出了新的可能的制备方法.     

组合薄膜制备技术在热电材料中的应用

"组合技术"是现代的新材料开发的手段。介绍了一些新的组合技术,如:"组合激光分子束外延技术"和"组合激光溅射制膜技术",并采用"组合激光溅射制膜技术",成功制备了高质量La1-xCexVO3(0≤x≤1)成分梯度薄膜。采用组合热电测量系统和组合XRD系统测量了La1-xCexVO3(0≤x≤1)成分梯度薄膜的热电性能和晶体结构。"组合激光溅射制膜技术"被证明是非常高效、精确的新材料薄膜研究方法,具有光明的前景。     

SQUIDs on the Base of Strained YBCO Films

Strained films of YBCO in which stresses caused by mismatching of film and substrate lattices and thermal expansion coefficients are frozen by quenching are grown on substrates LAO (1 0 0) by laser ablation method. Critical current in these films is suppressed about 2–3 orders of magnitude. The strained films have unusual temperature dependences with the minimum at the temperature range of 55–57~K. In spite of granular films with the same critical current the strained films are stable to thermocycles. DC-SQUIDs are manufactured on the base of the strained films with the sensitivity by flux up to 4.5 mk ₀/ Hz.     

Physics of Thin Films

The formulae for the reflection of a periodic system of thin films (S-polarization) valid in the soft X-ray region, based on Ewald's dynamical theory of diffraction, are presented. Model caluclations for some mirrors are presented and the results compared with the classical (Fresnel) formulae.     

大分子自组装功能膜的结构及界面层表征

介绍了四种常用分子方法在自组装功能膜结构及其界面层表征中的新进展，红外的光谱是常用结构分析方法，运用掠角射红外光谱及衰减全反身红外光谱可以分析自组装薄膜表面、界面结构以及分子链段的取向；ＸＰＳ分析可以确定薄膜的化学组成；电镜的运用使直接观察体系的形态，形貌成为可能；ＥＳＲ是研究滞物在溶液中自组装成胶束过各有力工具。     

Optical Properties of Polyimide Films in the Infrared

The objective of this study is to determine the infrared optical constants of polyimide films in the spectral range between 2000 and 7000 cm^-1using a five-oscillator Lorentz model. Model parameters are presented, in addition to the derived values of the complex refractive index and dielectric constant. The parameters were obtained using electromagnetic theory for thin films to model reflectivity data from two film samples with different thicknesses (5.17 and 12.4 m) on gold substrates examined at two incident angles. Measurements were taken using a polarizable reflectometer device in a Fourier transform infrared (FTIR) spectrometer. The real part of the refractive index, n, is shown to be about 1.67, while the imaginary part, k, is less than 0.01 over the spectral range examined. Results are consistent with findings of other experimentalists, and new data presented here show that polarization effects on thin film layers are predictable from the proposed model.     

影响印刷制版软片显影效果的因素

本文阐述了影响印刷制版软片显影效果的若干重要因素，如：显影液的配方、显影时间、显影温度、显影液的搅拌、补充液的重要性等，以及显影过程需要注意的一些基本问题。     

一种新型PDLC薄膜电-光性能的研究

选用丙烯酸胆固醇酯/甲基丙烯酸β-羟乙酯/液晶复合体系,在紫外光照射下制备聚合物分散液晶薄膜.研究了两种丙烯酸酯类单体的配比对聚合物分散液晶薄膜的电-光性能的影响规律,由此确定了制备综合电-光性能优异的PDLC薄膜材料的最佳制备条件.