Effect of citric acid on microstructure and electrochemical characteristics of high voltage anodized alumina film formed on etched Al Foils

被引：32

作者：

Ban Chao-lei ^{[1
,2
]}

He Ye-dong ^{[2
]}

Shao Xin ^{[1
]}

机构：

[1] Liaocheng Univ, Sch Mat Sci & Technol, Liaocheng 252059, Peoples R China

[2] Univ Sci & Technol Beijing, Beijing Key Lab Corros Eros & Surface Technol, Beijing 100083, Peoples R China

来源：

TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA | 2011年 / 21卷 / 01期

关键词：

citric acid; anodized oxide film; Al foil; Al electrolytic capacitor; electrochemical performance; AMMONIUM ADIPATE SOLUTION; GROWTH;

D O I：

10.1016/S1003-6326(11)60689-4

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

Aluminum capacitor foils with a tunnel etch structure were reacted with boiling water and then anodized at 530 V in boric acid solution or boric acid+citric acid mixed solution. The microstructure and crystallinity of the resulting anodized film were examined by TEM and XRD. The special capacitance, resistance and withstanding voltage of the film were explored with electrochemical impedance spectroscopy (EIS), LCR meter and small-current charging. The results show that the high voltage anodized oxide film consists of an inner layer with high crystallinity and an outer layer with low crystallinity. However, the crystallinity of the film formed in boric acid+citric acid mixed solution is higher than that of the film formed in only boric acid solution, leading to an increase in film's field strength and special capacitance. Meanwhile, there are more defects from phase transformation in the out layer of the film formed in boric acid+citric acid mixed solution than in that of film formed in only boric acid solution, leading to a decrease in film's resistance and withstanding voltage.

引用

页码：133 / 138

页数：6

共 16 条

[1] Control of pit initiation sites on aluminum foil using colloidal crystals as mask [J].

Asoh, Hidetaka ;

Nakamura, Koji ;

Ono, Sachiko .

ELECTROCHIMICA ACTA, 2007, 53 (01) :83-86

[2]

Ban Chao-lei, 2008, Chinese Journal of Nonferrous Metals, V18, P2190

[3] Controlling limiting length of tunnels on Al foil electroetched in HCl-H2SO4 solution [J].

Ban Chao-lei ;

He Ye-dong .

TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA, 2009, 19 (03) :601-605

[4]

Ban Chao-lei, 2007, Electronic Components & Materials, V26, P59

[5] Effect of heat-treatment on characteristics of anodized aluminum oxide formed in ammonium adipate solution [J].

Chang, JK ;

Lin, CM ;

Liao, CM ;

Chen, CH ;

Tsai, WT .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 2004, 151 (03) :B188-B194

[6] Microstructure and electrochemical characteristics of aluminum anodized film formed in ammonium adipate solution [J].

Chang, JK ;

Liao, CM ;

Chen, CH ;

Tsai, WT .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 2003, 150 (06) :B266-B273

[7]

CHANG JK, 2003, ELECTROCHEMISTRY, V9, P139

[8] Transition of hydrated oxide layer for aluminum electrolytic capacitors [J].

Chi, Choong-Soo ;

Jeong, Yongsoo ;

Ahn, Hong-Joo ;

Lee, Jong-Ho ;

Kim, Jung-Gu ;

Lee, Jun-Hee ;

Jang, Kyung-Wook ;

Oh, Han-Jun .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2007, 449 :314-317

[9]

Ding Jia, 2009, Electronic Components & Materials, V28, P82

[10] Formation of Al2O3-BaTiO3 composite thin film to increase the specific capacitance of aluminum electrolytic capacitor [J].

Du, Xianfeng ;

Xu, Youlong .

THIN SOLID FILMS, 2008, 516 (23) :8436-8440

← 1 2 →