Optical properties of anodic aluminum oxide films on Al1050 alloys

Shih, Teng Shih; Wei, Pai Sheng; Huang, Yung Sen

doi:10.1016/j.surfcoat.2007.12.002

Cited by 40 publications

(16 citation statements)

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“…What is more, additions of various modifiers to well know electrolytes [21] or to the new ones are recently reported in numerous papers [20,[22][23][24]. Usually the anodized aluminium is high purity (99.99%), but there are many papers about anodized aluminum alloys [21,[25][26][27][28][29], because they are generally less expensive and more accessible then highpurity aluminum.…”

Section: Introductionmentioning

confidence: 99%

Characterization of nanopores arrangement of anodic alumina layers synthesized on low-(AA1050) and high-purity aluminum by two-step anodizing in sulfuric acid with addition of ethylene glycol at low temperature

2016

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In this work the anodic aluminum oxide (AAO) was produced by two-step self-organized anodization of two classes purity aluminum in 0.3 M sulfuric acid aqueous solution with addition of ethylene glycol as the solution modifier. The arrangement analysis method based on fast Fourier transforms was applied to characterize the porous arrays ordering. The quality, arrangement, circularity and regularity of nanoporous AAO formed on the low-purity (AA1050) and high-purity aluminum were investigated in details. It was found that the regularity of the nanopores ordering obtained on low-purity aluminum at applied experimental conditions was extraordinarily high while compared to the data published previously. The relation between the structural features of nanopores as well as aluminum concaves ordering obtained in two-step anodization process depending on the step of reaction, was analyzed. It was proven that purity of anodizing aluminum influence the interpore distance, wherein the purer aluminum the smaller interpore distance. The observed phenomenon was discussed in details in accordance with intrinsic mechanism. Furthermore, there are no simple relations between regularity ratio of obtained nanostructures and the step of anodizing.

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Section: Introductionmentioning

confidence: 99%

Characterization of nanopores arrangement of anodic alumina layers synthesized on low-(AA1050) and high-purity aluminum by two-step anodizing in sulfuric acid with addition of ethylene glycol at low temperature

2016

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“…[1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19] However, few studies have been conducted on the anodization of low-purity aluminum. [21][22][23][24][25][26][27][28][29] Fabrication of anodic alumina membranes from low-purity aluminum foil is not trivial and often requires specific conditions, different from those typically applied to the anodization of high-purity aluminum. 29 Herein, we use two different aluminum foils which are high purity (99.999%) and relatively low purity (99.8%) to fabricate a porous alumina membrane.…”

Section: Introductionmentioning

confidence: 99%

Effect of Aluminum Purity on the Pore Formation of Porous Anodic Alumina

Kim¹,

Lee

2014

Bulletin of the Korean Chemical Society

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Anodic alumina oxide (AAO), a self-ordered hexagonal array, has various applications in nanofabrication such as the fabrication of nanotemplates and other nanostructures. In order to obtain highly ordered porous alumina membranes, a two-step anodization or prepatterning of aluminum are mainly conducted with straight electric field. Electric field is the main driving force for pore growth during anodization. However, impurities in aluminum can disturb the direction of the electric field. To confirm this, we anodized two different aluminum foil samples with high purity (99.999%) and relatively low purity (99.8%), and compared the differences in the surface morphologies of the respective aluminum oxide membranes produced in different electric fields. Branched pores observed in porous alumina surface which was anodized in low-purity aluminum and the size; dimensions of the pores were found to be usually smaller than those obtained from high-purity aluminum. Moreover, anodization at high voltage proceeds to a significant level of conversion because of the high speed of the directional electric field. Consequently, anodic alumina membrane of a specific morphology, i.e., meshed pore, was produced.

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“…Almost always, a high purity aluminum foil (min 99.99% of Al) is used as a substrate for anodization. There are only a few reports on anodizing of the AA1050 alloy (99.5% of Al) [21][22][23][24][25][26][27][28][29]. From an economical point of view, this material is very interesting because of its reasonable price -a thousand times cheaper than a high purity Al.…”

Section: Introductionmentioning

confidence: 99%