Structure-Related Optical Characteristics of Thin Metallic Films in the Visible and Ultraviolet

Surface irregularities and crystalline order strongly influence both the scattered light and absorption of metallic films. These effects extend through all spectral regions but are particularly important in the visible and ultraviolet. Scattered light arises from several scattering mechanisms. Macroscopic irregularities such as dust, scratches and particulates are typically much less important than are microirregularities only a few tens of angstroms in height but covering the entire surface. For metals such as silver and aluminum, which have plasma edges in the ultraviolet, the excitation of surface plasmons resulting from these microirregularities causes additional incoherently reemitted or “scattered” light. Surface plasmon excitation also causes increased absorption in some wavelength regions. These effects are enhanced by dielectric overcoating layers, which both increase the absorption and scattering and shift the wavelength at which the peak occurs. Surface plasmon excitation is particularly important in the ultraviolet region, where the dielectric overcoating applied to prevent formation of an oxide film on aluminized mirrors, for example, can significantly change the mirror reflectance. Plasmon excitation is made possible by a momentum conserving process associated with material inhomogeneities and hence can presumably be caused by crystalline disorder in the metal surface as well as surface irregularities. If the disorder is present on a sufficiently fine scale, it also affects the band structure of the metal and hence its optical absorption. Examples of the effect of film structure on the optical properties of evaporated and sputtered metal films will be given.     

室温硫化硅橡胶防污涂料使用寿命的试验研究

通过对运行９年的室温硫化硅橡胶防污涂料进行电气试验,试验结果表明,三级污秽地区在正常的维护条件下,涂料的耐污闪能力平均每年下降约６．５％,涂料的有效使用寿命只有７年。试验还证明,重涂室温硫化硅橡胶时无需将原有的残留物清除干净便可涂刷,同样可以达到相同效果。     

超平地坪在我国南车城轨车间的应用

以我国南车城轨车间地坪维修为例,介绍超平地坪的具体应用情况。     

保护膜制备参数对其性能影响的实验研究

以电子束蒸发法制得的ＭｇＯ保护膜为例,对保护膜制备参数,例如基板温度、沉积速率等 对保护膜表面结晶结构、形貌及成分等基本特性的影响进行了研究,为保护膜制备工艺的优化提供了指导。     

球床式高温气冷堆示范工程球形燃料元件的研制

为满足球床式高温气冷堆（HTR-PM）示范工程对球形燃料元件大批量生产、单球高铀含量和低破损率的要求,必须对10 MW高温气冷堆时期的球形燃料元件生产工艺进行改进和优化。通过对基体石墨粉、穿衣、压制、车削和热处理等关键设备及相关工艺进行重新设计和优化,建立了规模化的球形燃料元件生产工艺。采用该工艺生产的球形燃料元件,冷态性能如压碎强度、热导、磨损和腐蚀等均满足HTR-PM的技术指标,特别是球形燃料元件的平均自由铀含量与HTR-PM球形燃料元件的自由铀含量指标（6.0×10^-5）相差近1个数量级。采用优化后的规模化生产工艺,成功地研制出符合HTR-PM技术要求的球形燃料元件。     

HTR-PM燃料元件生产穿衣工艺及设备研制

自主研制了穿衣工艺所用非标设备,包括穿衣系统、滚筒筛、振选台、均匀化设备、不合格颗粒回收系统等。工艺实验结果显示,穿衣颗粒成品率高且稳定,破损率满足设计要求。设备易于操作控制,完全能满足高温气冷堆示范电站燃料元件规模生产的需要。     

介质保护膜制备参数对AC PDP放电特性的影响

以ＭｇＯ为例,对ＡＣ　ＰＤＰ中电子束蒸发介质保护膜制备的工艺参数,如成膜时基板温度、沉积速率、成膜后的热处理条件等对ＡＣＰＤＰ工作特性的影响进行了系统的研究和分析,讨论了保护膜成分、结构、形貌等对发射特性和ＡＣＰＤＰ工作特性的影响,探讨了成膜的最佳工艺,并根据在放电过程中,由离子轰击产生的 ＭｇＯ膜表面特性的变化和假设氧对 ＭｇＯ膜表面特性的作用,对观测到的放电特性对 ＡＣＰＤＰ板各种制造工艺参数的依赖性进行了解释。     

介质保护膜对AC-PDP放电特性影响测量装置的研究

本文提出并采用了测量ＡＣ ＰＤＰ放电特性和加速老化特性来探求保护膜发射和稳定性能的间接测量方法,研制了模拟ＡＣ ＰＤＰ放电特性测量装置。该装置驱动电源、放电室及真空系统组成,能够模拟ＡＣ ＰＤＰ的工作条件和过程,不仅可用来测量不同材料和不同方法、工艺制成的保护膜对ＡＣ ＰＤＰ工作电压、寿命等的影响,还可用来测量ＡＣ ＰＤＰ放电单元内所充气体的种类,气体混合比例、压力以及放电间隙的距离等参数对ＡＣ     

热处理工艺对AC PDP中MgO保护膜性能的影响

保护膜的表面特性严重影响ＡＣ ＰＤＰ的性能,本文以电子束蒸发法制得的ＭｇＯ保护膜为例,有关热处理条件对保护膜表面基本特性,如结晶结构,表面形貌及成分等的影响进行了研究。