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摘要铝电解电容器的最主要原材料为阳极铝箔，所以想要提高铝电解电容器的性能，必须设法提高阳极铝箔的比表面积。传统的铝箔隧道腐蚀工艺为将铝箔直接放入腐蚀液中进行电化学腐蚀，由于发孔地点的随机性，导致形成的隧道孔非常无序且大小不一致，难以实现铝箔比表面积的增加的可控性；本文试图将工艺改进为先在铝箔表面通过阳极氧化生成有序多孔阳极氧化铝模板(Porous Anodic Alumina, PAA)，利用其高度有序的孔洞结构定向引导铝箔表面隧道孔的腐蚀，使形成的隧道孔更加有序、可控，阳极铝箔的比表面积增大，从而更好的提高电解电容器的性能。结果表明，通过向制备PAA模板的电解液中加入聚合物来扩大PAA模板的孔间距，更有利于铝箔的电化学腐蚀。28570
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关键词 铝电解电容器 阳极铝箔 PAA模板 聚合物溶液 电化学腐蚀
毕业论文设计说明书外文摘要
Title Study on anodic oxidation and corrosion technology in polymer solution
Abstract
The main raw material of aluminum electrolytic capacitor is anode foil. So if you want to improve the performance of the aluminum electrolytic capacitor, you must increase the surface area of anode foils. The traditional process of tunnel corrosion on aluminum foil is put the aluminum foil directly into the etching solution for electrochemical corrosion. Because of the randomness of the hole location, the tunnels formed very disorderly and inconsistent size, so you can’t control the increase of the surface area of anode foils. This article attempts to improve the process for creating a layer of porous anodic alumina (PAA) template by anodic oxidation on aluminum foil surface first, using its highly ordered porous structure on aluminum foil surface to guide the form of the tunnels, make the tunnels more orderly and increase of the surface area of anode foils, then improve the performance of electrolytic capacitors better. The results show that by adding polymer to the electrolyte, we can expand the distance of the holes in the PAA template, which is more conducive to the electrochemical corrosion.
Keywords Aluminum electrolytic capacitor Anode foils PAA template Polymer solution Electrochemical corrosion
目 次
1 引言 1
1.1 课题背景与研究意义 1
1.2 PAA模板的制备工艺 1
1.3 电解电容器用阳极铝箔的腐蚀技术 4
1.4 本文的主要研究目的与研究内容 6
2 PAA模板的制备和扩孔工艺的研究 7
2.1 实验试剂与设备 7
2.2 实验方法与步骤 7
2.3 结果与讨论 9
2.4 本章小结 16
3 PAA模板在电化学腐蚀工艺中导向作用的研究 17
3.1 实验试剂与设备 17
3.2 实验方法与步骤 17
3.3 结果与讨论 18
3.4 本章小结 18
4 电化学腐蚀后铝箔电容量表征 19
4.1 实验试剂与设备 19
4.2 实验方法与步骤 19
4.3 结果与讨论 20
4.4 本章小结 21
结论 22
致谢 23
参考文献 24
1 引言
1.1 课题背景与研究意义