Abstract
A DSC method for evaluating the surface area of etched Al foils for use in high performance electrolytic capacitors is presented. A linear relationship between the etching degree (effective surface area) and the thermal resistance of the sample is obtained by means of DSC, based on the transient phenomenon. This method using the transient state in DSC measurement is not only novel, but also rapid and simple in evaluating the surface area of an etched aluminum foil. The method is effective even when the Al foil has a naturally oxidized surface.
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The authors wish to thank to Mr. Adachi and Mr. Koike of ELNA Co., Ltd. for supplying us with etched aluminum foils. This work is partially supported by the Research Fund of North Shore College of SONY Institute. R. O. whishes to express her gratitude to the support.
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Ozao, R., Ogura, H., Ochiai, M. et al. DSC of etched aluminum foils for use in electrolytic capacitors. Journal of Thermal Analysis 49, 1305–1314 (1997). https://doi.org/10.1007/BF01983688
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DOI: https://doi.org/10.1007/BF01983688