Nonlinear Dielectric Properties of Anodic Aluminum Oxide Films

Hasebe, Tomokazu; Alwitt, Robert S.

doi:10.1149/1.2776219

Cited by 5 publications

(3 citation statements)

References 23 publications

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“…23 for each value of 1-n in Table I. The common method estimates the dissipation factor for the Aluminum Electrolytic Capacitor, 13,15,16 taking the plot: the ESR vs Xc = 1/Cω (see the Fig. 5).…”

Section: Resultsmentioning

confidence: 99%

Dielectric Characteristics Analysis of Aluminum Electrolytic Capacitors Based on Linear Response Function

Mukaiyama

Yamamoto

2019

J. Electrochem. Soc.

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The electrical characteristics of Aluminum Electrolytic Capacitors are usually measured in frequency domain. The measured data of capacitance and dissipation or equivalent series resistance (ESR) has been treated individually for each frequency, and the “LCR” model has been developed by utilizing the measurement data in frequency domain. Therefore, these models don't show any relation between capacitance and dissipation which should follow the Kramers-Kronig relations. In this paper, we discuss the dielectric characteristics of Aluminum Electrolytic Capacitors based on the linear response theory. The complex dielectric formula based on this study can explain both the frequency and the temperature characteristic of capacitance of Aluminum Electrolytic Capacitor, and the relation between the frequency dependency of capacitance and the dissipation factor. This study is based on the hypothesis that the linear response function of the dielectric of Aluminum Electrolytic Capacitor should be expressed as the -nth powers of the ratio of time to the relaxation saturation time τdi. Only the two parameters: 1- n and τdi can give the exact calculation formula to both the capacitance and the dissipation factor of the dielectric behavior of Aluminum Electrolytic Capacitors.

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Section: Resultsmentioning

confidence: 99%

Dielectric Characteristics Analysis of Aluminum Electrolytic Capacitors Based on Linear Response Function

Mukaiyama

Yamamoto

2019

J. Electrochem. Soc.

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“…The electric field changes also produce electrostriction of the anodic oxide film. Hasebe and Alwitt reported electrostrictive behavior of anodic aluminum oxide films [30,31]. If the titanium anodic oxide film is brittle, this electrostriction of the anodic film may produce nanoor microcracks inside the film.…”

Section: Effect Of Temperature and Applied Potential On Repassivationmentioning

confidence: 99%

Effect of Potential, Temperature, and Fluoride Ions on the Repassivation Kinetics of Titanium in Phosphate Buffered Saline Solution with the Photon Rupture Method

et al. 2009

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The effect of the applied potentials, temperature, and F − ions on the localized repassivation kinetics of titanium was investigated by the photon rupture method, PRM, and electrochemical techniques in phosphate buffered saline solution. The log I versus log t plots after laser beam irradiation showed a rapid increase, then a decrease with a slope of about −1.5, which is steeper than that expected from high field oxide film formation theory, suggesting that the repassivation of titanium is a combination of electrochemical and chemical reactions. The repassivation current increases with increases in the applied potential and addition of F − ions, while solution temperature does not influence the repassivation kinetics. The effect of F − ions on the repassivation kinetics can be explained by localized pH changes caused by very rapid dissolution of titanium when titanium was exposed to PBS solution.

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“…Anodizing is a very important surface finishing of aluminum and its alloys for corrosion protection, [1][2][3] electronic devices, 4,5 and micro-/nano-fabrication. [6][7][8][9] Anodic aluminum oxide formed by anodizing has typically been classified into two different groups with distinct nanomorphology characteristics: barrier and porous oxides.…”

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Highly Ordered Anodic Alumina Nanofibers Fabricated via Two Distinct Anodizing Processes

Nakajima

Kikuchi

Natsui

2015

ECS Electrochemistry Letters

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Fabrication of high-density, highly ordered anodic alumina nanofibers was demonstrated via two distinct anodizing processes: porous and fibrous oxide formations. Highly ordered aluminum dimple arrays were fabricated via sulfuric/oxalic acid anodizing and selective porous alumina dissolution. Subsequent pyrophosphoric acid anodizing using the nanostructured aluminum surface caused anodic alumina nanofibers to grow preferentially at the six apexes of the ordered hexagonal aluminum dimples under the appropriate electrochemical conditions. Well-defined, high-density, highly ordered anodic alumina nanofibers with 37-75 nm periodic spacing and at densities of 1.4-5.6 × 10 14 m −2 were successfully fabricated on the aluminum surface via two distinct anodizing processes. © The Author(s) 2015. Published by ECS. This is an open access article distributed under the terms of the Creative Commons Attribution Non-Commercial No Derivatives 4.0 License (CC BY-NC-ND, http://creativecommons.org/licenses/by-nc-nd/4.0/), which permits non-commercial reuse, distribution, and reproduction in any medium, provided the original work is not changed in any way and is properly cited. For permission for commercial reuse, please email: oa@electrochem.org. [DOI: 10.1149/2.0021505eel] All rights reserved.Manuscript submitted February 11, 2015; revised manuscript received February 27, 2015. Published March 17, 2015 Anodizing is a very important surface finishing of aluminum and its alloys for corrosion protection, 1-3 electronic devices, 4,5 and micro-/nano-fabrication.6-9 Anodic aluminum oxide formed by anodizing has typically been classified into two different groups with distinct nanomorphology characteristics: barrier and porous oxides.10,11 An anodic barrier oxide can be obtained by anodizing in neutral solutions, and it possesses a thin, compact amorphous layer.12,13 In contrast, an anodic porous oxide can be formed by anodizing in acidic solutions and consists of numerous thick nanoscale hexagonal cells with nanopores at the center.14-16 Notably, self-ordering of the hexagonal cells can be achieved at the maximum voltage required to induce a high current density without burning, resulting in the formation of highly ordered porous alumina. [17][18][19][20][21][22] Anodic alumina possessing nanopores with a wide range of diameters, from tens to several hundreds of nanometers, is assembled during these anodizing techniques. [23][24][25] Porous oxide films with nanopores can also be formed on the aluminum substrate via anodizing in alkaline solutions, but it is difficult to obtain a well-ordered porous oxide film. [26][27][28] Because the nanomorphology of an anodic oxide is essentially limited to barrier or porous oxides, the discovery of an additional anodic oxide with different nanofeatures would expand the applicability of anodizing.Very recently, we reported a third-generation anodic oxide, anodic alumina nanofibers, fabricated via anodizing in concentrated pyrophosphoric acid. 29 During this anodizing process, alumina nanofibers measur...

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Nonlinear Dielectric Properties of Anodic Aluminum Oxide Films

Cited by 5 publications

References 23 publications

Dielectric Characteristics Analysis of Aluminum Electrolytic Capacitors Based on Linear Response Function

Dielectric Characteristics Analysis of Aluminum Electrolytic Capacitors Based on Linear Response Function

Effect of Potential, Temperature, and Fluoride Ions on the Repassivation Kinetics of Titanium in Phosphate Buffered Saline Solution with the Photon Rupture Method

Highly Ordered Anodic Alumina Nanofibers Fabricated via Two Distinct Anodizing Processes

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