电解电容器负极引出部位发生跳火的理论研究

研究了在特大纹波电流下电解电容器发生负极跳火的现象。通过对电容器的充放电过程模型进行分析,指出跳火的根本原因在于电容器负极铆接或冷压焊接的引出部位容量很小,会产生反向的电压并逐渐对引出部位进行电压化成,因此产生负极跳火现象。采用负极引出贴箔或增容处理工艺,可有效避免负极跳火,135℃,2000h试验后电容器的失效率为0。     

通信用锂密封蓄电池

针对通信电源中目前使用阀控式铅酸蓄电池受高温影响，严重缩短使用寿命的缺点，介绍国外最近开发的锂聚合物密封蓄电池的工作原理、结构和性能，以及在通信电源中的现场试点应用。     

瞄准国际先进水平，创新“连体机”设备，解决原箔氧化难题——记联合铜箔（惠州）有限公司开发和量产薄铜箔（18μm，12μm，10μm）产业化示范工程项目

联合铜箔(惠州)有限公司按国家“863”计划进行了高档铜箔的开发,研制了独创性“连体机”,采用了逆向溶铜工艺,生箔与后处理先进技术,研制成功18μm,12μm和10μm等薄铜箔并投入了量产化。产品质量全面达到IPC有关技术标准,性能价格比高,是优良的进口替代产品。     

Structure and corrosion resistance of nickel foils deposited in a vertical gravity field

The effects of vertical gravity fields on the structural characteristics of electrodeposited Ni foils were investigated in a centrifuge. Analysis by atomic force microscopy (AFM) shows that the surface roughness of Ni foils reduces from 37.6 nm to 8.1 nm with the increase of gravity coefficient (G) from 1 to 354. Furthermore, the roughness of Ni foils deposited at G = 62 evolves much more slowly than that deposited at G = 1. The study of the textural perfection by X-ray diffractiometry (XRD) reveals that the degree of (2 0 0) preferred orientation parallel to the substrate plane is lowered by the vertical gravity field. Randomly oriented deposits are obtained in the vertical gravity field while deposits with uniaxial texture are obtained in the natural gravity field. Due to these variations in the structure, the Ni foils obtained in the vertical gravity field exhibit improved corrosion resistance.     

Pre-equilibrium effects in the formation of meta stable states

Isomeric yield ratios have been measured for⁹³Nb(α, 2n)^95m,g Tc reaction in the energy range 25–60 MeV. The ratios were compared with theoretical values obtained by means of two models one based on compound nucleus mechanism only and the other including pre-equilibrium effects. The trend of experimental ratios is better reproduced by the latter model, although there remains some discrepancy as to the magnitude at higher energies.     

国产及进口高压电容器铝箔的电子显微研究

针对高压箔尚未根本国产化的问题，对日本、法国和国产铸轧电容铝箔进行了成分和显微分析。实验表明大量的（１００）晶面，适量的位错蚀坑、低杂质含量尤其是Ｆｅ元素量是提高高压铝箔比容的关键因素。结合生产实际分析了解决的途径。     

浅谈铜箔设备的发展

文章重点介绍电解铜箔设备的发展历史及未来的发展趋势。     

电解铜箔透光点产生原因分析

介绍电解铜箔透光点产生的各种原因及对策。     

电容器用铝箔隧道孔生长机理研究进展

综述了近年来国内外对铝箔电化学侵蚀机理的研究成果,指出了必须对铝箔隧道孔生长机制有更透彻的了解,需要控制隧道孔生长模式以便最大限度地拓展铝箔比表面积。结合实际研究结论,介绍了铝箔电化学脉冲侵蚀新模型。     

Heterogeneous flame propagation in the self-propagating high-temperature synthesis (SHS) process in multi-layer foils for three components system: Theory and experimental comparisons

A theory for the heterogeneous flame propagation in the self-propagating high-temperature synthesis (SHS) process that proceeds in multi-layer foils, consisting of alternating layers of constituents, has been extended to three-component systems, by describing a premixed mode of bulk flame propagation supported by a non-premixed reaction that proceeds at the layer surface of a constituent with higher melting-point. The formulation allows for finite rate Arrhenius reaction at the layer surface, temperature-sensitive Arrhenius mass diffusion in the liquid phase, and existence of intermixed region between constituent layers. It is confirmed that thickness ratio of the constituent layers is related to mixture ratio and that thickness ratio of the intermixed region and the constituent layer is related to degree of dilution. Results show that the burning velocity first increases, reaches the maximum, and then decreases rapidly, with decreasing alloy layer thickness, that the decrease in the burning velocity can be attributed to the increase in the substance in the intermixed region between constituent layers, playing a role of diluent, and that the increase in the activity and/or amount of the less-active component in the alloy suppresses the burning velocity. A preheating effect for the burning velocity is also predicted. In experimental comparisons, it has been demonstrated that the analytical results agree with available experimental data in the literature, indicating that the present formulation has captured the essential features of the adiabatic, heterogeneous SHS process.