低辐射隔热复合镀膜玻璃的制备

采用溶胶-凝胶法成功制备了SnO2∶F/SiO2气凝胶复合镀膜玻璃,并采用扫描电子显微镜(SEM)、导热系数仪、红外光谱仪,紫外-可见光谱仪等对镀膜玻璃的微观结构、热导率、辐射率、透光率等进行了表征。结果表明,镀膜玻璃的透过率最高在75%左右;辐射率为0.53,复合镀膜玻璃与FTO玻璃相比,其热导率从3.615W/(m·K)降低到3.368W/(m·K),所得复合镀膜玻璃兼具低热导性和低辐射性。     

退火处理对Si/SiC纳米复合薄膜性能与结构的影响

我们以硅烷(SiH4)和乙烯(C2H4)为原料,采用常压热分解APCVD法制备出了Si/SiC复合镀膜玻璃,并对其进行了退火处理.本文利用多种测试技术对退火后硅镀膜玻璃的光学性能以及其组成结构、化学稳定性等方面作了系统研究,发现退火处理能在保持镀膜玻璃其它重要性能变化不大的基础之上较好地改善硅镀膜玻璃的光学性能、降低玻璃的反射率、有效地防止目前日趋严重地光污染问题,为改善SSi/SiC复合镀膜玻璃的性能、扩大其应用领域作了有益的探索.     

TiO2\FTO镀膜玻璃色饱和度的数值模拟

本文以具有较高折射率的材料——二氧化钛(TiO2)替代自身折射率较低的材料——SiCOx作为氟掺杂氧化锡(FTO)镀膜玻璃中间层薄膜,通过数值模拟计算的方法主要研究了TiO2\FTO镀膜玻璃的表面色饱和度控制表现,并与传统的SiCOx\FTO镀膜玻璃就色饱和度控制表现进行了对比,结果发现TiO2\FTO镀膜玻璃具有更加优异的表面色饱和度控制表现,适合进行实际应用推广。     

磁控溅射镀膜技术在建材及民用工业中的应用

本文扼要阐述了磁控溅射镀膜技术在建材及民用工业中的应用前景及特点，所需设备类型及镀膜过程中应注意的若干问题，并对若干种镀膜玻璃的膜系及镀膜玻璃的性能要求与测试等问题进行了介绍。     

高可见光透过、高紫外截止镀膜玻璃的制备

为了提高镀膜玻璃的可见光透过率, 本研究通过反胶束溶液刻蚀法制备出一种新型玻璃基板, 即表面多孔玻璃。玻璃表面形成了蜂窝状的多孔膜层, 减小了对可见光的反射率, 从而使可见光平均透过率提高了7%。通过一系列射频磁控溅射实验, 探索了可见光平均透过率高, 紫外阻隔率最高的最佳工艺条件。在此条件下, 分别在制备的表面多孔玻璃和普通玻璃上镀CeO₂/TiO₂防紫外线膜, 并采用紫外-可见分光光度计、SEM、XRD、XPS等测试手段对样品进行了分析表征。结果表明, 在相同的镀膜条件下, 当镀膜后表面多孔玻璃与镀膜普通玻璃的紫外光阻隔率均为99%时, 表面多孔玻璃镀膜后的可见光平均透过率为85%, 而普通玻璃镀膜后的可见光平均透过率仅为79%。此外, 玻璃表面上的孔结构还提高了薄膜与基板的接触面积, 使膜基结合力提高2倍左右。     

低辐射镀膜玻璃及其应用

本文介绍了低辐射镀膜玻璃的隔热功能、隔热原理、结构特征和测试方法以及各种制备方法 ,讨论了低辐射镀膜玻璃在节能领域的应用前景。     

温度自适应红外热成像系统用硫系玻璃表面镀膜的研究进展

硫系玻璃具有透过谱段范围宽、折射率温度系数低等优点,是新一代温度自适应红外热成像光学系统的核心元件材料,应用前景十分广阔。为了满足不同服役环境的使用需求,须通过表面镀膜方式提升硫系玻璃的透过率和力学性能。介绍了国内外硫系玻璃表面镀膜的研究进展,在前期研究的基础上,总结归纳目前硫系玻璃镀膜存在的问题,并对硫系玻璃表面镀膜未来的发展方向做出预测。     

高温真空镀膜夹具的设计

对于要求整面镀膜的大规格玻璃面板,镀膜环境为高温的情况下,采用传统夹子夹持的方法,不能满足大规格玻璃整面镀膜的需要。提出一种新的思路,并设计了新夹具解决此问题。应用玻璃基片及金属材料热膨胀系数不同的特性,设计铝合金与耐热钢组合的夹具抵消高温引起的变形,利用玻璃基片的倒边来支承玻璃。     

空心玻璃微珠表面包覆改性及其应用

本文主要综述了空心玻璃微珠表面镀膜的类型及镀膜方法,经表面包覆改性可提高空心玻璃微珠的性能或使其具有新的性能,拓宽了其应用领域,同时也探讨了空心玻璃微珠表面包覆改性及其应用的发展趋势。     

透明导电氧化物镀膜玻璃的光伏应用前景

一、透明导电氧化物镀膜玻璃简介1.透明导电氧化物镀膜玻璃的定义透明导电氧化物镀膜(Transparent Conductive Oxide,TCO)玻璃,是在平板玻璃表面通过物理或者是化学镀膜的方法均匀镀上一层透明导电氧化物薄膜,主要包括铟(In)、锡(Sn)、锌(Zn)和镉(Cd)氧化物及     

Evaluation of optical and thermal properties of coatings for energy efficient windows

Over the past couple of decades a number of coated glazing products have appeared on the market, converting the window from an energy drain to a possible resource in the building's energy supply system. In this paper the light transmittance, total solar energy transmittance, and thermal transmittance of coated glazing currently available on the market and future dynamic electrochromic coatings are reviewed and their function in heating or cooling dominated climates discussed. Electrochromic coatings can switch between a transparent state and an absorbing or reflecting state when a small electrical potential is applied, and hence adapt their optical properties to the present condition. Energy balance calculations for the window component stress the importance of selecting the window depending on climate. In a heating dominated climate a low-e coating with a high g-value can result in a net energy gain on a south facing façade and thus be better than an ideal wall.     

Selectively coated high efficiency glazing for solar-thermal flat-plate collectors

In order to increase the efficiency of solar-thermal flat-plate collectors at temperatures above 100 °C or with low solar irradiation, we implement a double glazing with a low-emitting (low-e) coating on the inner pane to improve the insulation of the transparent cover. Since commercially available low-e glazing provides only insufficient solar transmittance for the application in thermal flat-plate collectors we are developing a sputter-deposited low e-coating system based on transparent conductive oxides which provides a high solar transmittance of 85% due to additional antireflective coatings and the use of low-iron glass substrates. Durability tests of the developed coating system show that our low e-coating system is well suitable even at high temperatures, humidity and condensation.     

Influence of cathode voltage on electrical property and crystal structure of sputter-deposited Ag thin films

The resistivity and crystal structure of Ag thin films were investigated as a function of the cathode voltage during the Ag sputter deposition. Low emissivity (low-e) coatings with a layered construction of glass/dielectric/Ag/dielectric were deposited by magnetron sputtering. It was found that the Ag layers in the low-e coatings showed lower resistivity when lower cathode voltage was applied. Furthermore, the X-ray diffraction measurement revealed that the crystallite of the Ag layer became larger with the decrease of the cathode voltage. It can be seen from these results that the Ag deposition resulting from low cathode voltage contributes to preferred crystal growth of the Ag layer. This improvement of the Ag crystallinity can be explained by the decrease in the kinetic energy of the Ar atoms backscattered on the Ag sputter target surface.     

Durability of doped zinc oxide/silver/doped zinc oxide low emissivity coatings in humid environment

The relationship between internal stress of doped zinc oxide films and durability of doped zinc oxide/silver/doped zinc oxide low emissivity (low-e) coatings in humid environment was investigated. Aluminum, titanium, tin, chromium, silicon, gallium, magnesium, boron, barium, and calcium were chosen as a doping element in sputtering targets. Ratios of dopant/zinc in the oxide targets were 4/96-5/95 at.%. Films were formed by radio frequency sputtering. Doping of barium and calcium to the zinc oxide film led to a large increase in the internal stress. Doping of the other elements resulted in decreasing the internal stress. It was concluded that durability of the low-e coatings in humid environment closely correlated with the internal stress of the oxide layers.     

广州某办公楼外窗对空调冷负荷的影响分析

采用DeST软件对广州某普通办公楼8种类型外窗在不同遮阳措施条件下的空调冷负荷进行了模拟分析。分析表明：增加浅色窗帘遮阳,并更换原建筑外窗普通6mm单层玻璃为镀Low-e膜中空玻璃（低透型）或中空玻璃后,节能率可分别达到13.9%和10.4%,节能效果显著。这对广州地区普通办公楼外窗的设计有一定的指导作用。     

基于智能复合镀膜设备的控制系统设计

本文结合复合镀膜设备及镀膜工艺特点,详细分析了复合镀膜设备镀膜工艺流程以及过程中容易产生能耗和污染的问题.并在此基础上,根据设备真空系统、工装和水冷系统、控制系统以及设备各个源的协同作用进行了系统设计,通过PLC和LabVIEW软件协同设计和实现了智能复合镀膜设备自动控制系统,以保证镀膜设备和工艺生产的稳定性及可靠性,...     

对土壤湿度具有自调节功能的导水涂层纤维的研究

蓄水渗膜是一种用于荒漠化地区生态恢复、抗旱节水造林的新材料技术。本文对用于蓄水渗膜的导水纤维进行了研究。导水涂层纤维是由植物纤维及其表面制备的具有分子导水功能的涂层组成。采用Perkl Elmer Diamond SⅡ综合热分析仪、Cambridge Instrument STEREOSCAN360扫描电镜、XSP-9F型光学显微镜和显微图像分析仪、M30快速水分测定仪对设计的导水涂层纤维的涂层材料脱附水特征、可控缓释水特性做了分析研究;将导水涂层纤维复合薄膜包装水后进行了现场试验研究。结果表明,通过对导水涂层纤维的涂层材料成分和导水涂层纤维密度的调整,可实现蓄水渗膜的合理的渗水速度及对土壤湿度的自调节功能,保证了树苗的扎根存活率。     

Vacuum glazing: Current performance and future prospects

The development of vacuum glazing is a significant advance in the area of low heat loss glazing systems with great potential to reduce building heating and when combined with solar control glazing, cooling loads. The basic concept of vacuum glazing is reviewed and the procedures and research undertaken in the development of both high-temperature and low-temperature sealing of vacuum glazing are outlined. The achieved thermal performance of current laboratory systems and those that are now commercially available are presented. The potential levels of performance that may be achieved using high-performance low-emittance (low-e) coatings and tempered glass are reported. Research into window systems that incorporate vacuum glazing to achieve improved thermal performance is also outlined.     

A material point method model and ballistic limit equation for hyper velocity impact of multi-layer fabric coated aluminum plate

A multi-layer fabric coated aluminum plate is usually used in the hard upper torso of space suit to protect astronauts from getting hurt by space dust. In this paper, the protective performance of the multi-layer fabric coated aluminum plate is investigated. To establish its ballistic limit equation, thirteen hyper velocity impact tests with different impact velocities (maximum velocity is 6.19 km/s) and projectile diameters have been conducted. To provide data for impact velocity higher than 6.2 km/s which is hard to be obtained by tests due to the limitations of test equipment capacity, a material point method (MPM) model is established for the multi-layer fabric coated aluminum plate and validated/corrected using the test results. The numerical results obtained using the corrected MPM model for impact velocity higher than 6.2 km/s are used together with the test results to develop the ballistic limit equation. The corrected MPM model and the ballistic limit equation developed for the multi-layer fabric coated aluminum plate provide an effective tool for the space suit design.     

The Development of a Unique Buffered Matrix Aspirin Tablet

Aspirin is used widely as an analgetic, antipyretic, and antirheumatic agent. The major disadvantage of aspirin therapy is gastrointestinal irritation caused by direct contact of the solid aspirin crystals and the gastric mucosa which causes gastrointestinal bleeding. Buffered aspirin tablets have been developed to reduce gastrointestinal bleeding. However, these multilayer tablets have proven to be, at times, ineffective.

A compressed buffered aspirin tablet was formulated which was composed of aqueous-based polymer coated aspirin crystals, a buffering system, a hydrophilic gel-forming matrix material, a binder, and a hydrophobic lubricant. The aspirin crystals were coated with an aqueous-based polymer to reduce aspirin degradation caused by the tablet components. The Glatt GPCG5 fluid bed with a top spray apparatus was used to coat 3 to 6 percent wt./wt. polymer onto aspirin crystals.

The coated aspirin crystals were incorporated with the tablet components and directly compressed using conventional tablet technology and equipment. Aspirin was released rapidly from the eroding matrix. Erosion was achieved due to the gel formation of Methocel K100LV which protects the tablet interior from dissolving and disintegrating upon initial wetting and hydration. The buffering system created a microenvironment of pH 5 within and around the eroding tablet matrix to aid in increasing aspirin solubility. The prototype formulation was scaled-up to large processing equipment and tablet stability was evaluated.