Anodizing properties of high dielectric oxide films coated on aluminum by sol-fel method

Sang Shik Park; Byong Taek Lee

doi:10.1007/s10832-004-5085-z

Anodizing properties of high dielectric oxide films coated on aluminum by sol-fel method

Sang Shik Park
, Byong Taek Lee

Kongju National University

Research output: Contribution to journal › Article › peer-review

46 Scopus citations

Abstract

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)O _x /Al ₂O₃ was formed on aluminum substrates after anodizing of ZrO₂(Nb₂O₅)/Al film. The thickness of Al ₂O₃ 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.

Original language	English
Pages (from-to)	111-116
Number of pages	6
Journal	Journal of Electroceramics
Volume	13
Issue number	1-3
DOIs	https://doi.org/10.1007/s10832-004-5085-z
State	Published - Jul 2004

Keywords

Al electrolytic capacitor
Anodizing
Nb O
Sol-gel
ZrO

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title = "Anodizing properties of high dielectric oxide films coated on aluminum by sol-fel method",

abstract = "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)O x /Al 2O3 was formed on aluminum substrates after anodizing of ZrO2(Nb2O5)/Al film. The thickness of Al 2O3 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.",

keywords = "Al electrolytic capacitor, Anodizing, Nb O, Sol-gel, ZrO",

author = "Park, \{Sang Shik\} and Lee, \{Byong Taek\}",

year = "2004",

month = jul,

doi = "10.1007/s10832-004-5085-z",

language = "English",

volume = "13",

pages = "111--116",

journal = "Journal of Electroceramics",

issn = "1385-3449",

publisher = "Springer Netherlands",

number = "1-3",

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TY - JOUR

T1 - Anodizing properties of high dielectric oxide films coated on aluminum by sol-fel method

AU - Park, Sang Shik

AU - Lee, Byong Taek

PY - 2004/7

Y1 - 2004/7

N2 - 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)O x /Al 2O3 was formed on aluminum substrates after anodizing of ZrO2(Nb2O5)/Al film. The thickness of Al 2O3 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.

AB - 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)O x /Al 2O3 was formed on aluminum substrates after anodizing of ZrO2(Nb2O5)/Al film. The thickness of Al 2O3 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.

KW - Al electrolytic capacitor

KW - Anodizing

KW - Nb O

KW - Sol-gel

KW - ZrO

UR - https://www.scopus.com/pages/publications/17044366953

U2 - 10.1007/s10832-004-5085-z

DO - 10.1007/s10832-004-5085-z

M3 - Article

AN - SCOPUS:17044366953

SN - 1385-3449

VL - 13

SP - 111

EP - 116

JO - Journal of Electroceramics

JF - Journal of Electroceramics

IS - 1-3

ER -

Anodizing properties of high dielectric oxide films coated on aluminum by sol-fel method

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Keywords

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