Can aluminum foil be used for electrolytic capacitor sintering?
Conclusion Anode foil for aluminum electrolytic capacitor was prepared by powder additive manufacturing technology. Based on the TG-DTG analysis, the sintering process was designed. Moreover, the effects of aluminum powder particle size and sintering temperature on electrical properties were investigated.
How to prepare anode foil for electrolytic capacitors?
Anode foil for electrolytic capacitors were prepared using AM technology. The relationship between microstructure and electrical properties is studied. Sintering neck and particle size are the key factors affecting properties. The optimum preparation conditions are 630 °C and 5-6 μm.
Why do we need anodic foil manufacturing technology?
With the continuous updating and iteration of electronic products, new anodic foil manufacturing technology is urgently needed to achieve the miniaturization and light weight of aluminum electrolytic capacitors by means of improving the effective specific surface area of the anodic foil.
What is the specific capacitance of anode foil?
The specific capacitance increased firstly and then decreased as the powder diameter rose. The best electrical properties of the prepared anode foil were obtained when the sintering temperature was 630 °C and the powder diameter was 5– 6 μm, which was equivalent to the performance of traditional etched foil.
How to prepare anode foil?
The anode foil preparation process is shown in Fig. 1. Firstly, the aluminum slurry is prepared. Briefly, the mixed solvent with dispersant is used to disperse the high-purity aluminum powder and the mixture is stirred in a planetary gravity mixer, which is denoted as A. PVB and DBP are dissolved in the same solvent, which is denoted as B.
What is the performance of aluminum electrolytic capacitors?
The performance of aluminum electrolytic capacitors largely depends on the specific surface area of the anode foil. A high specific surface area is commonly obtained by electrochemical etching, so that high-density etched tunnels (>10 7 /cm 2) are formed on aluminum foil [, , ].
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