Anodizing Properties of High Dielectric Oxide Films Coated on Aluminum by Sol-Gel Method

被引：8
作者：
Sang-Shik Park
Byong-Taek Lee
机构：
[1] Sangju National University,Department of Materials Science and Engineering
[2] School of Advanced Materials Engineering,undefined
[3] Kongju National University,undefined
来源：
Journal of Electroceramics | 2004年 / 13卷
关键词：
Al electrolytic capacitor; sol-gel; anodizing; ZrO; Nb; O;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
In order to obtain the high capacitance in aluminum electrolytic capacitor, ZrO2 and Nb2O5 films were coated on aluminum foils by sol-gel method, and then the properties of anodized films were examined. The triple layer of ZrO2/Al-Zr(Nb)Ox/Al2O3 was formed on aluminum substrates after anodizing of ZrO2(Nb2O5)/Al film. The thickness of Al2O3 layer decreased with increasing the annealing temperature due to the densification of ZrO2 film and the capacitance of ZrO2 coated aluminum foil annealed at low temperature was higher than that at high temperature. The increase of capacitance was due to the high capacitance of ZrO2 film annealed at low temperature. The capacitance of ZrO2 and Nb2O5 coated aluminum increased about 3 and 1.7 times compared to that of Al2O3 layer anodized with 400 V, respectively. From these results, the aluminum foils with composite oxide layers are found to be applicable to the aluminum electrolytic capacitor.
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页码：111 / 116
页数：5
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