Improvement of pore distribution uniformity of nanoporous anodic aluminum oxide with pulse reverse voltage on low-and-high-purity aluminum foils

Chen-Kuei Chung, W. T. Chang, M. W. Liao, H. C. Chang

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Many conventional anodic aluminum oxide (AAO) templates were performed using direct current anodization (DCA) at low temperature (0-5°C) to avoid Joule-heat-dissolution effect at relatively high temperature of 20-25°C. In this article, a small pulse reverse voltage added to normal-positive pulse anodization which is called hybrid pulse anodization (HPA) has been investigated for improving pore distribution uniformity of AAO at high temperature. The nanoporous AAO films were synthesized with both low-purity (99) and high-purity (99.997) aluminum (Al) foils in 0.3 M oxalic acid by different voltage modes of HPA and DCA for comparison. The pore distribution uniformity can be much improved by small pulse reverse voltage in 3 h duration anodization compared to DCA method. The small pulse reverse voltage presented the high uniformity of 88 and 91 for both low and high purity Al due to nearly zero cathodic current for reducing Joule-heat-dissolution. The effect of Al purity and voltage mode on uniformity improvement was further discussed.

Original languageEnglish
Pages (from-to)104-107
Number of pages4
JournalMaterials Letters
Volume88
DOIs
Publication statusPublished - 2012 Dec 1

Fingerprint

Aluminum foil
Aluminum Oxide
foils
purity
aluminum oxides
aluminum
porosity
Aluminum
Oxides
Electric potential
electric potential
pulses
direct current
Dissolution
dissolving
Oxalic Acid
Oxalic acid
heat
oxalic acid
Temperature

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering
  • Mechanics of Materials

Cite this

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title = "Improvement of pore distribution uniformity of nanoporous anodic aluminum oxide with pulse reverse voltage on low-and-high-purity aluminum foils",
abstract = "Many conventional anodic aluminum oxide (AAO) templates were performed using direct current anodization (DCA) at low temperature (0-5°C) to avoid Joule-heat-dissolution effect at relatively high temperature of 20-25°C. In this article, a small pulse reverse voltage added to normal-positive pulse anodization which is called hybrid pulse anodization (HPA) has been investigated for improving pore distribution uniformity of AAO at high temperature. The nanoporous AAO films were synthesized with both low-purity (99) and high-purity (99.997) aluminum (Al) foils in 0.3 M oxalic acid by different voltage modes of HPA and DCA for comparison. The pore distribution uniformity can be much improved by small pulse reverse voltage in 3 h duration anodization compared to DCA method. The small pulse reverse voltage presented the high uniformity of 88 and 91 for both low and high purity Al due to nearly zero cathodic current for reducing Joule-heat-dissolution. The effect of Al purity and voltage mode on uniformity improvement was further discussed.",
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Improvement of pore distribution uniformity of nanoporous anodic aluminum oxide with pulse reverse voltage on low-and-high-purity aluminum foils. / Chung, Chen-Kuei; Chang, W. T.; Liao, M. W.; Chang, H. C.

In: Materials Letters, Vol. 88, 01.12.2012, p. 104-107.

Research output: Contribution to journalArticle

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AU - Chung, Chen-Kuei

AU - Chang, W. T.

AU - Liao, M. W.

AU - Chang, H. C.

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AB - Many conventional anodic aluminum oxide (AAO) templates were performed using direct current anodization (DCA) at low temperature (0-5°C) to avoid Joule-heat-dissolution effect at relatively high temperature of 20-25°C. In this article, a small pulse reverse voltage added to normal-positive pulse anodization which is called hybrid pulse anodization (HPA) has been investigated for improving pore distribution uniformity of AAO at high temperature. The nanoporous AAO films were synthesized with both low-purity (99) and high-purity (99.997) aluminum (Al) foils in 0.3 M oxalic acid by different voltage modes of HPA and DCA for comparison. The pore distribution uniformity can be much improved by small pulse reverse voltage in 3 h duration anodization compared to DCA method. The small pulse reverse voltage presented the high uniformity of 88 and 91 for both low and high purity Al due to nearly zero cathodic current for reducing Joule-heat-dissolution. The effect of Al purity and voltage mode on uniformity improvement was further discussed.

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