| dc.description.abstract | The project aimed at studying the cathode foil of aluminum (1000 series) electrolytic capacitor. In addition to the composition, it also investigated the difference of stablizing treatment.
First of all, adjusted the composition of ingot, and determined the chemical composition by ICP-AES technique. Second, the process of making Al-foil was homogenizaion treatment of ingot, hot rolling (t=6mm), then directly cold rolling to 60μm. Finally, Al-foil was carried out different stablizing treatment. The texture of Al-foil was analyzed by pole figure, and microstructure observation was used by transmission electron microscope (TEM).
During the chemical corrosion, the rate of weight loss was controlled to 30%. To discuss the effect of capacitance caused by corrosion structure, the morphology of etched surface and cross section was observed by scanning electron microscope (SEM) and optical microscope (OM).
The experiment was shown it can get highest capacitance which use 80℃×1.0hr stablizing treatment after cold rolling. About adding element, the result of adding 0.3% Cu is better when making stablizing treatment. But without making stablizing treatment, the capacitance of adding 0.15%Cu is highest. Adding Si element, the corrosion morphology is completely different. The corrosion structure changes from sponge shape to surface etching, causes the capacitance decreases substantially. | en_US |