New Fabrication of Multiple-Layer Microcoil Using Anodic Oxidized Aluminum

1999 ◽  
Vol 11 (5) ◽  
pp. 431-435
Author(s):  
Kenichi Muraki ◽  
◽  
Katsutoshi Kuribayashi
Keyword(s):  
Anodic Oxidation ◽  
Potential Application ◽  
High Potential ◽  
Oxidation Time ◽  
Promising Candidate ◽  
Simple Process ◽  
Low Resistance ◽  
Power Stations ◽  
Multiple Layer ◽  
Sputter Deposited

A multiple-layer microcoil is a promising candidate for micromagnetic sensors for probing cracks in pipes in power stations and plants. We proposed fabrication of multiple-layer microcoils combining Al anodic oxidation and photolithography, and conducted experiments with the following results: 1) Sputter-deposited Al was anodically oxidized and thickness of Al2O3 formed controlled by anodic-oxidation time. 2) A pattern with Al and Al2O3 was made by masking Al with photoresist to prevent anodic oxidation. 3) A multiple-layer Al and Al2O3 was fabricated by combining Al anodic oxidation and photolithography. 4) As these results shown, multiple-layer microcoils having both high inductance and low resistance were fabricated as proposed using a simple process and having a high potential application to smaller multiple-layer microcoils.

Processing and microstructure characterization of a novel porous hierarchical TiO2 structure

2009 ◽  
Vol 24 (5) ◽  
pp. 1683-1687 ◽  
Author(s):  
G.A. Crawford ◽  
N. Chawla ◽  
J. Ringnalda
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Anodic Oxidation ◽  
Potential Application ◽  
Surface Characterization ◽  
Porous Coating ◽  
Bioactive Coating ◽  
Transmission Electron ◽  
Uniform Diameter

We report on a novel biocompatible hierarchical TiO2 porous coating on the surface of Ti, processed via anodic oxidation. The coating consists of large (∼1–20 μm) pores on the microscale and nanotubes (∼50 nm diameter) on the nanoscale. This structure is exciting because of its potential application as a bioactive coating for Ti bone implants. Surface characterization of the coating showed nanotubes of relatively uniform diameter. The interface between TiO2 nanotubes and Ti, studied by transmission electron microscopy, was incoherent. The tubes were also somewhat interconnected.

scholarly journals A novel donor–π–acceptor halochromic 2,6-distyrylnaphthalene chromophore: synthesis, photophysical properties and DFT studies

RSC Advances ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 168-176
Author(s):  
Farhad Panahi ◽  
Ali Mahmoodi ◽  
Sajjad Ghodrati ◽  
Fazlolah Eshghi
Keyword(s):  
White Light ◽  
Potential Application ◽  
High Performance ◽  
Light Emission ◽  
Photophysical Properties ◽  
White Light Emission ◽  
High Potential ◽  
Dft Studies ◽  
Ph Responsive

A new pH-responsive fluorescence chromophore with white light emission at pH = 3 was synthesized which has high potential application in the preparation of high-performance lighting devices.

scholarly journals Enhanced Saccharification of Purple Alfalfa via Sequential Pretreatment with Acidified Ethylene Glycol and Urea/NaOH

Processes ◽  
2021 ◽  
Vol 10 (1) ◽  
pp. 61
Author(s):  
Bo Fan ◽  
Lin Zhang ◽  
Zhengyu Tang ◽  
Liang Chen ◽  
Yu-Cai He
Keyword(s):  
Ethylene Glycol ◽  
Significant Influence ◽  
Potential Application ◽  
Reducing Sugars ◽  
High Potential ◽  
Lignocellulosic Material ◽  
Enzymatic Digestibility ◽  
Cellulose Accessibility ◽  
Hemicellulose Removal ◽  
High Yields

Purple Alfalfa is an inexpensive, abundant, readily available lignocellulosic material. This work was attempted to develop an efficient combination pretreatment by sequential HClO4–ethyl glycol–H2O (1.2:88.8:10, w/w/w) extraction at 130 °C in 0.5 h and urea/NaOH (urea 12 wt%, NaOH 7 wt%) soaking at −20 °C for 0.5 h for the pretreatment of purple alfalfa. The porosity, morphology, and crystallinity of pretreated purple alfalfa were characterized with SEM, FM, XRD, and FTIR. This combination pretreatment had a significant influence on hemicellulose removal and delignification. The above changes could enhance cellulose accessibility to enzymes and improve the enzymatic digestibility of cellulose. High yields of reducing sugars from pretreated purple alfalfa were obtained at 93.4%. In summary, this combination pretreatment has high potential application in the future.

scholarly journals Influence Of Fabrication Condition on the Microstructural and Optical Properties of Lead-Free Ferroelectric Bi\(_{0.5}\)Na\(_{0.5}\)TiO\(_{3}\) Materials

2016 ◽  
Vol 26 (1) ◽  
pp. 51 ◽  
Author(s):  
Le Thi Hai Thanh ◽  
Nguyen Hoang Tuan ◽  
Luong Huu Bac ◽  
Dang Duc Dung ◽  
Phung Quoc Bao
Keyword(s):  
Optical Properties ◽  
Potential Application ◽  
Piezoelectric Properties ◽  
Sol Gel ◽  
Ferroelectric Materials ◽  
Precursor Concentration ◽  
Lead Free ◽  
Promising Candidate ◽  
Fabrication Condition ◽  
Ferroelectric And Piezoelectric Properties

Lead-free ferroelectric materials have attracted considerable attention due to the increasing potential application in environmental benign materials. Among lead-free ferroelectric materials, the Bi0.5Na0.5TiO3 (BNT) materials were more studied because it exhibited the good ferroelectric and piezoelectric properties which could be promising candidate materials replacing Pb(Zr,Ti)O3. In this work, the lead-free ferroelectric BNT materials were synthesized by sol-gel method. The effects of fabrication process to microstructural and optical properties were studied which includes Na precursor concentration and calcining temperature. The result indicated that the Na precursor concentration were higher 40 mol.% and the calcining temperatures

Development of Iron‐Rich Layers during Anodic Oxidation of Sputter‐Deposited Al‐4 atom % Fe Alloy

1999 ◽  
Vol 146 (7) ◽  
pp. 2502-2507 ◽  
Author(s):  
H. Habazaki ◽  
K. Takahiro ◽  
S. Yamaguchi ◽  
K. Shimizu ◽  
P. Skeldon ◽  
...  
Keyword(s):  
Anodic Oxidation ◽  
Sputter Deposited

scholarly journals Effect of the Electrolyte Temperature and the Current Density on a Layer Microhardness Generated by the Anodic Aluminium Oxidation

2015 ◽  
Vol 2015 ◽  
pp. 1-9 ◽  
Author(s):  
Emil Spišák ◽  
Miroslav Gombár ◽  
Ján Kmec ◽  
Alena Vagaská ◽  
Erika Fechová ◽  
...  
Keyword(s):  
Growth Rate ◽  
Chemical Composition ◽  
Anodic Oxidation ◽  
Current Density ◽  
Vickers Microhardness ◽  
Surface Current ◽  
Oxidation Time ◽  
Electrolyte Temperature ◽  
Current Densities ◽  
Oxalic Acids

The paper investigates the influence of the chemical composition and temperature of electrolyte, the oxidation time, voltage, and the current density on Vickers microhardness of aluminium oxide layers, at the same time. The layers were generated in the electrolytes with different concentrations of sulphuric and oxalic acids and surface current densities 1 A·dm−2, 3 A·dm−2, and 5 A·dm−2. The electrolyte temperature varied from −1.78°C to 45.78°C. The results have showed that while increasing the electrolyte temperature at the current density of 1 A·dm−2, the increase in the layer microhardness values is approximately by 66%. While simultaneously increasing the molar concentration of H2SO4in the electrolyte, the growth rate of the microhardness value decreases. At the current density of 3 A·dm−2, by increasing the electrolyte temperature, a reduction in the microhardness of the generated layer occurs with the anodic oxidation time less than 25 min. The electrolyte temperature is not significant with the changing values of the layer microhardness at voltages less than 10.5 V.

Anodic Oxidation Parameters on Al-Cu Alloy Anodizing Film's Electrochemical Ability by EIS

2006 ◽  
Vol 11-12 ◽  
pp. 665-668
Author(s):  
Chao Guo ◽  
Yu Zuo ◽  
Jing Mao Zhao ◽  
Xu Hui Zhao ◽  
Jin Ping Xiong
Keyword(s):  
Anodic Oxidation ◽  
Porous Layer ◽  
Current Density ◽  
Barrier Layer ◽  
Oxidation Time ◽  
Equivalent Circuits ◽  
Anodic Current Density ◽  
Anodic Current ◽  
Cu Alloy ◽  
Oxidation Parameters

EIS is used in this paper to study the effects of anodic oxidation parameters on the film’s ability, and multi-layer equivalent circuits are proposed. The oxidation time has great effect on porous layer, the porous layer’s impedance increases as the anodic oxidation time prolong; anodic current density has effect on both barrier layer and porous layer, higher current density gets higher impedance values in both barrier layer and porous layer; anodic oxidation temperature has great effect on barrier layer, when the temperature decreases, the barrier layer’s impedance increases.

Preparation and properties of the anodized film on Fe-Cr-Al alloy surface

2020 ◽  
Vol 67 (4) ◽  
pp. 379-386
Author(s):  
Jialin Yang ◽  
Yunting Guo ◽  
Wei Zai ◽  
Siyuan Ma ◽  
Liang Dong ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Ethylene Glycol ◽  
Anodic Oxidation ◽  
Current Density ◽  
Oxidation Process ◽  
Electrochemical Impedance ◽  
Oxidation Mechanism ◽  
Oxidation Time ◽  
Al Alloy ◽  
Content Type

Purpose This paper aims to find a way to improve the surface insulation, corrosion resistance and mechanical properties of Fe-Cr-Al electrothermal alloy, exploring the best oxidation condition and analyzing the oxidation mechanism. Design/methodology/approach Electrochemical workstation was used for anodic oxidation, and the effect of current density, ethylene glycol concentration and oxidation time on properties of the film were investigated by resistivity test, scanning electron microscope, electrochemical tests (potentiodynamic polarization and electrochemical impedance spectroscopy) and mechanical tests, and the oxidation process was analyzed by X-ray photoelectron spectroscopy (XPS). Findings According to the potential-time curves of anodic oxidation and the analysis of XPS, the whole oxidation process can be divided into four stages. When the current density is 0.8 A/dm2, the ethylene glycol concentration is 10%, and the oxidation time is 60 min, the film has the best corrosion protection, mechanical properties and surface morphology. The resistivity of the samples is about 13 orders magnitude than that of the matrix. Originality/value In this paper, a protective electrically insulating film was prepared by anodic oxidation in an alkaline electrolyte solution. The oxidation conditions were optimized and the oxidation mechanism was analyzed.

scholarly journals Metal-substrate-supported tungsten-oxide nanoarrays via porous-alumina-assisted anodization: from nanocolumns to nanocapsules and nanotubes

2016 ◽  
Vol 4 (21) ◽  
pp. 8219-8232 ◽  
Author(s):  
Alexander Mozalev ◽  
Maria Bendova ◽  
Francesc Gispert-Guirado ◽  
Zdenek Pytlicek ◽  
Eduard Llobet
Keyword(s):  
Tungsten Oxide ◽  
Anodic Oxidation ◽  
Porous Alumina ◽  
Metal Substrate ◽  
Oxide Semiconductor ◽  
Sputter Deposited

Arrays of tungsten-oxide semiconductor nanorods, nanocapsules, and nanotubes are synthesized via anodic oxidation of Al/W layers sputter-deposited on substrates.

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