溶胶-凝胶法制备ITO薄膜及其光电性能的研究

采用溶胶-凝胶工艺,用提拉法在玻璃基底上制备了ITO透明导电薄膜。使用四探针测试仪和紫外可见光分光光度计测量薄膜的方阻和透过率,并采用XRD、SEM等测试手段对薄膜的晶体结构、表面形貌进行了表征。结果表明,掺锡比例和热处理温度对薄膜的导电性具有重要影响,在掺Sn量为15%(原子分数比)、450℃热处理时薄膜的方阻最小;薄膜的透过率曲线随掺锡比例的增加向紫外方向移动。随着热处理时间、镀膜层数的增加,薄膜的方阻先减小,最后趋于一稳定值,在可见光范围内薄膜的透过率变化较小。     

采用近红外光谱技术检测蜂蜜中蔗糖含量的研究

利用近红外透射光谱快速测量蜂蜜中的蔗糖含量,采用偏最小二乘方(PLS)回归,建立光谱测量值与化学值之间的校正模型,找出二者的相关性,探讨近红外检测技术应用于蜂蜜品质分析的可能性。     

基于动态粒子参数选择的水雾透过率计算

为了研究多次散射效应对辐射在雾中传输特性的影响,提出了一种多粒子雾层模型,该模型中雾滴粒子为半径不同的球形水滴粒子。雾滴粒子半径被分为多个区间,计算了不同半径区间内雾滴粒子的传输近似光学参数。提出了一种基于动态粒子参数选择的蒙特卡罗法,并模拟0.85μm和4μm辐射在重度平流雾、中度平流雾、重度辐射雾和中度辐射雾中的传输。分析了传输距离对透过率和计算时间的影响,并与传统的蒙特卡罗法的计算结果进行比较。结果表明:相比于4μm辐射,0.85μm辐射在雾中的透射能力更强;基于动态粒子参数选择的蒙特卡罗法与传统蒙特卡罗法计算得到的透过率随传输距离的变化曲线具有相同的趋势,传输距离为150 m时,两种方法对0.85 μm和4 μm辐射在重度平流雾中的透过率的绝对误差分别为0.0483和0.0015;传输距离为400 m时,相较于传统的蒙特卡罗法,基于动态粒子参数选择的蒙特卡罗法对4 μm辐射在重度平流雾中的传输计算效率可提升44%。基于动态粒子参数选择的蒙特卡罗法计算雾中的远距离辐射传输,可有效缩短计算时间。该研究结果对雾天的目标识别与探测有重要意义。     

Growth and characterizations of CdGeAs2 single crystal by descending crucible with rotation method

By the method of descending crucible with rotation, crack-free CdGeAs2single crystals of U15 mm 950 mm were grown in a furnace with three independen heating zones after optimizing the temperature field, and the descending and rotational speed to meet the need of CdGeAs2crystal growth. The properties of as-grown crysta were characterized by a variety of techniques. The results of X-ray diffraction(XRD) show that there are two cleavage faces, which are(110) and(101). The peaks are in high intensity and good symmetry, which demonstrates that the crystal is integral in structure and well crystallized. The energy-dispersive spectrometry results indicate that the wafer of the CdGeAs2crystal is closer to the stoichiometry The IR transmittance of the wafer is *48.6 % at 5.5 lm, and the maximum value is up to 51.6 % in the range of2.3–18.0 lm. Etch pits of(001) face are observed and the density of the etch pits is evaluated to be 1 9 105cm-2.     

改进的Malkmus带模式晴空大气透射率计算方法(英文)

Malkmus带模式在气候研究以及遥感应用中具有较高的应用价值,然而其计算精度不高。针对该问题,引入修正量对Malkmus模型进行改进。实验采用HITRAN2008谱线数据和美国空军地球物理实验室(AFGL)提供的6种大气模式计算垂直路径大气分子的透射率数据。在不同的大气模式下,以MODTRAN计算结果为参考标准,利用最小二乘拟合得到修正量并将其用于大气透射率补偿。相对于传统Malkmus模型,改进模型的透射率精度提高了1~2个数量级。结果表明,本方法不仅能有效地提高模型计算精度,而且适用于不同的大气模式和大气分子。     

Optical,electrical and morphological properties of transparent binary doped polyaniline thin films synthesized by in situ chemical bath deposition

The development of polymeric thin films has attracted attention in the optoelectronics field due to their transparency. The aim of the research presented was to obtain transparent polyaniline thin films by easy in situ oxidative polymerization of aniline with ammonium persulfate in the presence of a binary doping agent–poly(vinyl alcohol) mixture. Poly(acrylic acid), 2‐acrylamido‐2‐methyl‐1‐propanesulfonic acid or sodium dodecylsulfate were mixed with hydrochloric acid to form the binary doping agents. Polyaniline thin films were produced during aniline polymerization on Corning glass slides immersed in the mixture in order to study their optical, electrical and morphological properties. The optical absorption coefficient and the energy band gap were evaluated by optical transmission of the films in the UV‐visible spectral region. The optical absorption coefficient of all polyaniline films was of the order of 10⁴ cm^?1 with a maximum transmittance up to 80% at 550 nm. In order to investigate the effect of the mixture on the surface morphology and roughness of the films, atomic force microscopy was used. In general, surface roughness was reduced threefold by adding a mixture and optical transmission was increased by 20–30% without significantly affecting the absorption coefficient and the band gap of polyaniline. Islands and needle‐like structures on the film surfaces were obtained from various mixtures affecting the conductivity; for example, 0.17 S cm^?1 was obtained from needle‐like morphology, while 1.9 × 10^?4 S cm^?1 was obtained from island morphology. Raman spectroscopy studies confirmed the presence of poly(vinyl alcohol) in the thin films. Copyright © 2011 Society of Chemical Industry     

退役炮弹发射药在涂料中的应用

以退役炮弹发射药为原料,全部或部分代替传统的硝基纤维素(NC)应用在硝基漆系列产品中,除产品性能达到原标准外,也大幅降低了生产成本,既节省了能源又具有良好的经济效益。     

14 kHz～18 GHz夹网电磁屏蔽视窗的研制

通过分析、比较不同制作工艺、不同目数的屏蔽玻璃的屏蔽效能测试结果，并结合电磁屏蔽原理，研制出了全新的165目屏蔽网，它完全满足GJB5729--2006中B级标准值的要求，可应用于对低频指标有高标准要求的场合。     

陶瓷金卤灯发展的关键——多晶氧化铝陶瓷泡壳（上）

本文简述了陶瓷金卤灯的特征特性，分析了灯对陶瓷材料的要求，对比了某些陶瓷材料的结构成分及对陶瓷灯的影响，对国产陶瓷材料及泡壳进行了分析研究并给出了部分分析结果。