阳极氧化铝微通道板研究的进展

微通道板(Microchannel Plates,MCP)是一种先进的电子倍增器件,在微光夜视等多个领域有着广泛的应用.传统铅硅酸盐玻璃微通道板(Lead Silicate Glass Microchannel Plates,LSG-MCP)越来越不能满足小孔径、高分辨率、环境友好等方面的要求,寻求替代产品成为研究热点.详细介绍了一种新型微通道板—阳极氧化铝微通道板(Anodic Aluminum Oxide Microchannel Plates,AAO-MCP)的研究进展,包括多孔AAO的特点、微通道的形成、功能层的制备、计算机模拟等.AAO-MCP具有孔径小、面积大、耐强磁场、工作温度范围宽等特点,应用前景广阔.最后分析了AAO-MCP存在的问题以及未来发展方向.     

电解电容器用铝箔腐蚀工艺研究

采用正交实验方法,选择腐蚀溶液的组成、腐蚀电压、腐蚀温度和时间四因素,探索影响环保型铝电解电容器用腐蚀箔性能的工艺参数。结果表明:当ψ(H2SO4∶HCl)为3∶1,电压为8V,温度为85℃,腐蚀时间85s时,可以获得高比容(0.59)高强度(弯折次数140)兼顾的性能。腐蚀溶液的组成、电压是影响腐蚀箔性能的主要因素。     

工作电解液配方的计算机辅助设计软件

介绍一种工作电解液配方的计算机辅助设计系统 WEDS,包括其系统特点、功能模块组成及主要方法原理。并给出了一个该系统的使用实例。试验表明这是一个十分有效、实用的电解液配方辅助设计。     

表观电化学参数对铝箔交流电侵蚀的影响

改变交流电密度 (J)、电解液温度 (T)及盐酸浓度 (ci)侵蚀电容器铝箔 ,并以表观电化学参数(J/ ci T)为依据 ,通过侵蚀铝箔的表面形貌和侵蚀箔比容的变化规律 ,研究了铝箔在纯盐酸中受〔Cl- 〕和〔H+ 〕影响的交流侵蚀机制。     

CA30型非固体钽电解电容器的可靠性

改善 CA30型非固体钽电解电容器结构的密封性、介质氧化膜的质量及工作电解液温度特性是提高产品质量的稳定性、可靠性及使用寿命的三个关键因素。将半密封结构改为全密封结构 ,产品质量可显著提高。     

铝电解电容器阴极箔的后处理和稳定化处理

研究硝酸后处理对阴极箔比容的影响和稳定化处理形成氧化膜的机理。硝酸浓度和温度低 ,侵蚀箔稳定化处理后氧化膜不稳定 ,容量衰减快。浓度和温度高 ,侵蚀箔容量损失大 ,侵蚀箔的初始比容低。加入硫脲和六偏磷酸钠可提高铝箔的初始比容。磷酸和钼酸钠迭加处理使侵蚀箔获得高的初始比容和低的容量衰减率 ,磷酸处理形成氧化膜可分为 Al PO4结构的表面层及 Al PO4和部分 Al被 P代替的水合氧化铝的过渡层。钼酸钠处理形成的氧化膜可分为 Al2 (Mo O4) 3结构的表面层及 A12 (Mo O4) 3和部分 Al被 Mo代替的水合氧化铝过渡层     

铝合金微波组件的感应软钎焊工艺研究

阐述了感应加热的原理和设备的人机界面特点,分析了铝合金感应软钎焊的优点,根据试验需要设计了专用工装.文中将感应加热技术应用于铝合金微波组件的软钎焊,利用感应加热速度快、加热集中和工件变形小等优点,设计相应的感应器,开展焊接温度场测试和感应软钎焊工艺研究,实现了铝合金微波组件的连接,其焊缝外观一致,内部焊缝致密,微波组件焊后变形较小.     

Zero Thermal Expansion Achieved by an Electrolytic Hydriding Method in La(Fe,Si)13 Compounds

The La(Fe,Si)₁₃‐based compounds have been recently developed as promising negative thermal expansion (NTE) materials by elemental substitution, which show large, isotropic and nonhysteretic NTE properties as well as relatively high electrical and thermal conductivities. In this paper, the La(Fe,Si)₁₃ hydrides are prepared by a novel electrolytic hydriding method. Furthermore, the thermal expansion and magnetic properties of La(Fe,Si)₁₃ hydrides are investigated by the variable‐temperature X‐ray diffraction and physical property measurement system. Fascinatingly, it is found that room‐temperature NTE properties and zero thermal expansion (ZTE) properties with broad operation‐temperature window (20–275 K) have been achieved after electrolytic hydriding. The further magnetic properties combined with theoretical analysis reveal that the improvements of NTE and ZTE properties in the La(Fe,Si)₁₃ hydrides are ascribed to the variations of magnetic exchange couplings after hydrogenation. The present results highlight the potential applications of La(Fe,Si)₁₃ hydrides with room‐temperature NTE and broad operation‐temperature window ZTE properties.     

An Omni‐Healable Supercapacitor Integrated in Dynamically Cross‐Linked Polymer Networks

Self‐healing will greatly improve the reliability of an energy‐storage device in case of physical damage, but the challenge remains in assembling such a smart device capable of repairing all its electroactive components simultaneously. Here, an omni‐healable supercapacitor that can spontaneously repair its electrolyte, electrodes, and even the interfaces between them in ambient conditions after mechanical damage is reported. The goal is achieved by integrating electrolyte and electrode materials into a dynamic poly(vinyl alcohol)‐based network cross‐linked by diol‐borate ester bonding. The capacitor fast restores its configuration, mechanical properties, and capacitive performances during all 15 breaking/healing cycles without external stimulus, regardless of the breaking positions. Interestingly, the capacitor can tolerate various physical deformations and even tailoring without performance deterioration. The investigation offers a facile and versatile strategy to construct an intrinsically self‐healable energy‐storage device that has potential application for portable/wearable electronics, smart apparels or flexible robots, and so on.