| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1583975 | Materials Science and Engineering: A | 2007 | 4 Pages |
Abstract
We investigated the effects of additives to the etching solution of 1 M hydrochloric acid on the electrochemical etching behavior for aluminum electrolytic capacitors, using scanning and transmission electron microscopy, and AC impedance spectroscopy. For the addition of 1 M sulfuric acid or 5% ethylene glycol to the hydrochloric acid solution, the distribution of etch tunnels was more uniform with high density of etch pits compared with that without addition. The highest specific surface area was obtained from the electrolyte with 5% ethylene glycol additive. The correlation of internal morphologies of etched foils with impedance parameters was interpreted by impedance techniques.
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Physical Sciences and Engineering
Materials Science
Materials Science (General)
Authors
Han-Jun Oh, Jong-Ho Lee, Hong-Joo Ahn, Yongsoo Jeong, No-Jin Park, Seong-Su Kim, Choong-Soo Chi,