含ZrFeNi42合金再结晶及蚀刻性能的研究

作为电子封装工业用引线框架主要材料之一的ＦｅＮｉ４２合金应当具有良好的应用性能。本工作研究了微量添加元素Ｚｒ对ＦｅＮｉ４２合金再结晶及晶粒长大的影响。结果表明，Ｚｒ元素可以明显地提高合金的再结晶温度，并能有效地抑制合金再结晶后的晶粒长大。此外，腐蚀实验的结果表明，Ｚｒ元素的加入可以改善合金腐蚀后的表面粗糙度，这将有利于蚀刻法生产所获得的ＦｅＮｉ４２合金引线框架的质量。

显微组织对718塑料模具钢蚀刻性能的影响

在预硬型大截面718塑料模具钢上取样,热处理后得到粒状贝氏体、下贝氏体、回火马氏体、不均匀粒状贝氏体4种组织,采用光学显微镜、扫描电镜、光学轮廓仪、电化学工作站等研究了显微组织对表面蚀刻性能的影响。结果表明:在质量分数35.%NaCl溶液中,不同显微组织试样的耐蚀性能由优到劣的排序为粒状贝氏体、下贝氏体、回火马氏体、不均匀粒状贝氏体;由于组织和碳化物的分布不均匀,不均匀粒状贝氏体组织试样中的相界面增多,导致微电池反应数量增多,腐蚀加快,因此耐蚀性能最差;均匀细小粒状贝氏体组织试样则表现出更好的耐蚀性能。

铝镁含量对微晶锌板蚀刻性能的影响

文章以实验为依据，着重探求了铝镁含量对微晶锌板蚀刻性能的影响。结果表明，高铝（0．10％Al）、高镁（0．08％Mg）试样在蚀刻硝酸浓度13．0％～16．2％的范围内，能够获得大于0．05mm／min的蚀刻速度和达到60～80g／L的极限溶锌量，并同时取得理想的版面质量。这与适量的Mg2Zn11，相呈弥散状态均匀分布于细化的结晶组织中，改善了材料的蚀刻性能有关。为此，控制相应的加工条件后，企业内控标准的铝镁含量范围以0．09％～0．10％Al、0．07％～0．08％Mg为宜。

电解铜箔在印制电路板端的评估方法研究

文章概述了电子铜箔的分类,介绍了电解铜箔表面处理工艺流程及对性能的影响;从CCL组分(铜箔)级、CCL级、PCB级三个层次梳理了相关标准对铜箔性能的评价项目。结合问题案例,从PCB端重点研究了铜箔的评估方法,包括:抗剥强度,抗氧化性和微蚀性,蚀刻性及绝缘性,并分析了影响因素,提出了注意事项。

Effect of KOH treatment on structural and photovoltaic properties of ZnO nanorod arrays

ZnO nanorod arrays （NRs） were synthesized on the fluorine-doped SnO2 transparent conductive glass （FTO） by a simple chemical bath deposition （CBD） method combined with alkali-etched method in potassium hydroxide （KOH） solution. X-ray diffraction （XRD）, scanning electron microscopy （SEM） and current-voltage （I-V） curve were used to characterize the structure, morphologies and optoelectronic properties. The results demonstrated that ZnO NRs had wurtzite structures, the morphologies and photovoltaic properties of ZnO NRs were closely related to the concentration of KOH and etching time, well-aligned and uniformly distributed ZnO NRs were obtained after etching with 0.1 mol/L KOH for 1 h. ZnO NRs treated by KOH had been proved to have superior photovoltaic properties compared with high density ZnO NRs. When using ZnO NRs etched with 0.1 mol/L KOH for 1 h as the anode of solar cell, the conversion efficiency, short circuit current and open circuit voltage, compared with the unetched ZnO NRs, increased by 0.71%, 2.79 mA and 0.03 V, respectively.

Carbon monoxide oxidation on copper manganese oxides prepared by selective etching with ammonia

A series of copper manganese oxides were prepared using a selective etching technique with various amounts of ammonia added during the co-precipitation process. The effect of the ammonia etching on the structure and catalytic properties of the copper manganese oxides was investigated using elemental analysis, nitrogen physisorption, X-ray powder diffraction, scanning and transmission electron microscopy, X-ray photoelectron spectroscopy, H2 temperature-programmed reduc- tion, and Oz temperature-programmed desorption combined with catalytic oxidation of CO. It was found that ammonia can selectively remove copper species from the copper manganese oxides, which correspondingly generates more defects in these oxides. An oxygen spillover from the man- ganese to the copper species was observed by H2 temperature-programmed desorption, indicating that ammonia etching enhanced the mobility of lattice oxygen species in these oxides. The Oz tem- perature-programmed desorption measurements further revealed that ammonia etching improved the ability of these oxides to release lattice oxygen. The improvement in redox properties of the copper manganese oxides following ammonia etching was associated with enhanced catalytic performance for CO oxidation.

193 nm深紫外光刻胶用成膜树脂的研究进展

本文综述了用于193 nm深紫外光刻胶的主体成膜树脂的种类及常用合成单体的研究进展,包括聚(甲基)丙烯酸酯体系、环烯烃-马来酸酐共聚物(COMA)体系、乙烯醚-马来酸酐共聚物(VEMA)体系、降冰片烯加成聚合物体系、环化聚合物体系、有机-无机杂化树脂体系以及光致产酸剂(PAG)接枝聚合物主链型等,并分析了目前关于曝光、分辨率和抗蚀刻性能方面存在的问题及未来的发展方向。

Metal-assisted chemical etching of silicon and the behavior of nanoscale silicon materials as Li-ion battery anodes

This review outlines the developments and recent progress in metal-assisted chemical etching of silicon, summarizing a variety of fundamental and innovative processes and etching methods that form a wide range of nanoscale silicon structures. The use of silicon as an anode for Li-ion batteries is also reviewed, where factors such as film thickness, doping, alloying, and their response to reversible lithiation processes are summarized and discussed with respect to battery cell performance. Recent advances in improving the performance of silicon-based anodes in Li-ion batteries are also discussed. The use of a variety of nanostructured silicon structures formed by many different methods as Li-ion battery anodes is outlined, focusing in particular on the influence of mass loading, core-shell structure, conductive additives, and other parameters. The influence of porosity, dopant type, and doping level on the electrochemical response and cell performance of the silicon anodes are detailed based on recent findings. Perspectives on the future of silicon and related materials, and their compositional and structural modifications for energy storage via several electrochemical mechanisms, are also provided.

Facile one-pot fabrication of α-Fe_2O_3 nano-coffee beans by etching along [001] direction for high lithium storage

It is a great challenge to finely tune the morphology of iron oxides for energy storage. In this work, we introduced a facile hydrothermal method to obtain single crystalline hematite （α-Fe2O3） nano-coffee beans （NCBs） with the assistance of acetic acid. Interestingly, α-Fe2O3 nanos- tructures with this special morphology were formed under the effect of Ostwald ripening and oriented etching of H^＋ ions along [001] direction, which could be proved by the scanning electron microscope/transmission electron microscope and X-ray diffraction. After calcination at high temperature, the as-prepared α-Fe2O3 NCBs were used as potential anode ma- terials, showing a very high reversible capacity of 810 mA h g^-1 （0.2 C）, excellent cycling stability, and high-rate performance for lithium storage. Hence, in virtue of the good performances, the structural design of nanomaterials would be promoted in the fabrication of electrode materials for lithiumion batteries.