共查询到18条相似文献,搜索用时 109 毫秒
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磁控溅射中的海绵卷绕设备研究 总被引:1,自引:1,他引:0
在大量试验的基础上,总结了磁控溅射中海绵的传动特性,设计了微张力海绵卷绕系统,建立了传动控制的数学模型,经大量试验和使用证明,该设计满足了磁控溅射中海绵卷绕的要求。 相似文献
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国外高真空卷绕镀膜设备发展现状 总被引:1,自引:1,他引:0
从设备总体、卷绕系统、真空系统、蒸发源系统和电气控制系统等方面综合介绍国外主要的高真空卷绕镀膜设备制造公司LS、GVE、GVT和ULVAC的包装装饰用设备发展现状。 相似文献
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卷绕式镀膜机传动系统有交流电机驱动方式和直流电机驱动方式两种,直流电动机由于转矩特性好、调速容易,在卷绕式镀膜机卷绕系统中应用广泛.在卷材张力值较小运行时,传动系统出现运行不稳定的现象.本文对引起不稳定的因素进行了分析,此原因为直流电动机电枢电流不连续.用Matlab对分析的结果进行了仿真.运行结果表明,串入续流电抗器后,卷绕系统运行稳定. 相似文献
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从设备总体,卷绕系统,真空系统,蒸发源系统和电气控制系统等方面介绍国外主要的高真空卷绕镀膜设备制造公司LS、GVE、GVT和ULVAC的包装装饰用设备发展现状。 相似文献
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本文通过对H4811Ⅱ型卷绕真空镀膜机的研制介绍,着重叙述了该机卷绕系统的设计,说明了该机可广泛应用在锦纶布、涤纶布等化纤纺织品带材及塑料薄膜和纸等带材上蒸镀金属薄膜,是一种适用于新的专利技术的大型多功能卷绕真空镀膜设备。 相似文献
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《真空》2016,(1)
本文从系统结构、参数控制和镀膜方式等综述了真空卷绕镀膜技术研究进展。按结构可分为单室、双室和多室真空卷绕系统,后两者可解决开卷放气问题并分别控制卷绕和镀膜室各自真空度。卷绕张力控制分锥度、间接和直接控制模型,锥度控制模型可解决薄膜褶皱和径向力分布不均的问题;间接张力控制无需传感器,可用内置张力控制模块的矢量变频器代替;直接张力控制通过张力传感器精确测量张力值,但需惯性矩和角速度等多种参数。真空卷绕镀膜主要有真空蒸发、磁控溅射等方式,可用于制备新型高折射率薄膜、石墨烯等纳米材料和柔性太阳能电池等半导体器件。针对真空卷绕镀膜技术研究现状及向产业化过渡存在的问题,最后作了简要分析与展望。 相似文献
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Cao Yong Luo Penghui Xu Yang Zhang Cong Tian Chang You Yuanqi Tian Meiling Wang Liqiong Zhou Shenggang 《Journal of Materials Science: Materials in Electronics》2021,32(16):21297-21307
Journal of Materials Science: Materials in Electronics - In this paper, a hydrothermal synthesis method synthesized a foamed nickel (NF)-supported Ag-doped Ag2S@MoS2 hydrogen evolution catalyst.... 相似文献
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The biosorption process for the removal of nickel(II) by loofa sponge-immobilized biomass of Chlorella sorokiniana (LIBCS), a newly developed immobilized biosorbent, was characterized. Effects of environmental factors on metal uptake capacity of LIBCS were studied and compared with free biomass of C. sorokiniana (FBCS). Nickel(II) removal by LIBCS was found to be influenced by pH of the solution, initial metal concentration, and biomass concentration. The biosorption of nickel(II) ions by both LIBCS and FBCS increased as the initial concentration of nickel(II) ions increased in the medium. No loss to biosorption capacity of LIBCS for nickel(II) was found due to the presence of loofa sponge, indeed as compared to FBCS an increase of 25.3% was noted in the biosorption capacity of LIBCS. Maximum biosorption capacities for FBCS and LIBCS were found as 48.08 and 60.38 mg nickel(II)/g, respectively, whereas the amount of nickel(II) ions adsorbed on the plain loofa sponge was 6.1mg/g. During these biosorption studies, LIBCS exhibited excellent physical and chemical stability without any significant release/loss of microalgal biomass from loofa sponge matrix. The kinetics of nickel(II) removal was extremely fast reaching at equilibrium in about 15 min for LIBCS and 20 min for FBCS. The biosorption equilibrium was well described by the Langmuir and Freundlich adsorption isotherms. The biosorption capacities were found to be solution pH dependent and the maximum adsorption was found at a solution pH 4-5. The LIBCS could be regenerated using 75 mM HCl, with up to 98% recovery. The LIBCS were shown to be robust and stable with little decrease in the nickel(II) uptake capacity when used in consecutive seven biosorption-desorption cycles. Continuous removal of nickel(II) from electroplating effluent by LIBCS packed in fixed bed column bioreactor confirm the possibility of developing a biological treatment process for the removal of toxic metals from authentic wastewater. 相似文献
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《Materials Science & Technology》2013,29(7):985-986
AbstractA preliminary experimental investigation has been carried out on an isotropic three dimensional reticulated foamed metal with high porosity under biaxial tensile loading. The approximate relationship between tensile strength of these materials and their porosity has been evaluated under equal-speed biaxial tension loading. The mathematical formula is proved to be in a good agreement with the experimental data for nickel foam. 相似文献
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通过基于高孔率开口泡沫金属材料结构特点的简化结构模型和受力状态分析,建立了此类材料在循环载荷作用下的负载结构-疲劳模型,分析得出了对应疲劳性能的衡量指标。在上述模型的基础上,运用由该模型得出的高孔率开口泡沫金属疲劳性能的衡量指标,以电沉积法所得泡沫镍为例,对此类材料的疲劳性能进行了相关的实验研究。通过压-压循环和弯曲循环两种载荷作用的实验,验证了理论分析所得疲劳性能衡量指标的可行性。结果表明:泡沫镍在压-压循环载荷作用下的类应力疲劳性能随孔率增大而降低,而在弯曲循环载荷作用下的类应变疲劳性能则随孔率增大和孔径减小而提高。 相似文献
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通过LS-DYNA模拟分析泡沫铝填充多棱管的准静态过程。以柱壳比(R)作为比较具有不同截面形状的泡沫铝填多棱管的依据。通过比吸能、比力和能量吸收率,实现泡沫铝填充多棱管吸能性能的定量化比较分析。研究发现在具有相同柱壳比的条件下,泡沫铝填充四棱管的比吸能最高;泡沫铝填充八棱管的能量吸收率最高(约78%);四棱管的吸能量占泡沫铝填充四棱管总吸能量的比例最小(约57%)。不同的几何形状和结构对泡沫铝填充多棱管的吸能性能有着显著的影响。同时,对泡沫铝填充多棱管的变形模式和内在机制也做了初步的分析 相似文献