Effect of Preparation Conditions on the Performance of Anodic Aluminum Oxide Films

2012 ◽  
Vol 164 ◽  
pp. 223-226
Author(s):  
Xiao Zhen Liu ◽  
Jun Hua Yang ◽  
Gang Wang ◽  
Ling Ling Song ◽  
Ge Shi Zhuang
Keyword(s):  
Acid Solution ◽  
Aluminum Oxide ◽  
Sulphuric Acid ◽  
Anodic Aluminum Oxide ◽  
Sulphuric Acid Solution ◽  
Anodization Voltage ◽  
Anodization Time ◽  
Anodic Aluminum ◽  
Preparation Conditions ◽  
Anodization Method

Neodymium salt was used as additives in preparing anodic aluminum oxide (AAO) films to improve its performance. AAO films were prepared by anodization method from a 15 vol. % sulphuric acid solution containing neodymium salt. The effects of anodization voltage, anodization temperature and anodization time on microhardness and thickness of AAO films were researched, respectively. The thickness of AAO film increases with the increase of anodization voltage, the microhardness of AAO film decreases with the increase of anodization voltage in 19 V～23 V. The thickness of AAO film increases with the increase of anodization temperature, the microhardness of AAO film decreases with the increase of anodization temperature in 11 °C～19°C. The thickness of AAO film increases with the increase of anodization time, the microhardness of AAO film decreases with the increase of anodization time in 30 min～3 h. When the anodizing parameters: anodization voltage: 22 V, temperature: 15°C, anodization time: 2 h, the thickness and microhardness of AAO film is as high as 135μm and 305.4 HV.

Research on Effect of Erbium Salt in the Anodization of Aluminum

2011 ◽  
Vol 413 ◽  
pp. 300-303
Author(s):  
Xiao Zhen Liu ◽  
Liang Wei Zhu ◽  
Gang Wang ◽  
Ling Ling Song ◽  
Xiao Yun Tang
Keyword(s):  
Heat Treatment ◽  
Acid Solution ◽  
Aluminum Oxide ◽  
Heat Treatment Temperature ◽  
Anodic Aluminum Oxide ◽  
Sulphuric Acid Solution ◽  
Treatment Temperature ◽  
Anodic Aluminum ◽  
First Time ◽  
Anodization Method

Erbium salt was used as additives for the first time in preparing anodic aluminum oxide (AAO) films to improve its performance. AAO films were prepared from a 15 vol. % sulphuric acid solution containing erbium salt by anodization method; the effects of concentration of erbium on microhardness and thickness of AAO film were researched, respectively. The effect of heat treatment temperature on structure of AAO film was researched. AAO films were characterized by XRD, EDAX and SEM techniques, respectively. The microhardness and thickness of AAO film were 378.5HV and 82μm respectively, which were higher 12.99% and 17.14% than those of the film prepared in electrolyte of nothing addition erbium salt respectively. The aperture of AAO film was more uniform and the surface of AAO film was smoother than those of films prepared in electrolyte of nothing addition erbium salt. The apertures of AAO film were in 25~30nm. There was not erbium in AAO film. AAO films were amorphous when heat treatment temperatures of AAO film were below 800°C, when heat treatment temperature of AAO film were 850°C and 1000°C respectively, and AAO films were γ-Al2O3and α-Al2O3film respectively.

Effect of Neodymium Salt in the Anodization of Aluminum in Sulphuric Acid

2011 ◽  
Vol 415-417 ◽  
pp. 1895-1898 ◽  
Author(s):  
Xiao Zhen Liu ◽  
Jian Qiang Gen ◽  
Ai Bing Yu ◽  
Gang Wang ◽  
Ling Ling Song ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Acid Solution ◽  
Sulphuric Acid ◽  
Heat Treatment Temperature ◽  
Anodic Aluminum Oxide ◽  
Sulphuric Acid Solution ◽  
Treatment Temperature ◽  
Anodic Aluminum ◽  
First Time ◽  
Anodization Method

Neodymium salt was used as additives for the first time in preparing anodic aluminum oxide (AAO) films to improve its performance. AAO films were prepared by anodization method from a 15 vol. % sulphuric acid solution containing neodymium salt; the effects of concentration of neodymium on microhardness and thickness of AAO film were researched, respectively. The effect of heat treatment temperature on structure of AAO film was researched. AAO films were characterized by XRD, EDAX and SEM techniques. The microhardness and thickness of AAO film were 377.2HV and 85μm respectively, which were higher 12.60% and 21.43% than those of the film prepared in electrolyte of nothing addition neodymium salt, respectively. The surface of AAO film was smoother and the aperture of AAO film was more uniform than those of films prepared in electrolyte of nothing addition neodymium salt. The apertures of AAO film were in 25～30nm. There was not neodymium in AAO film. AAO films were amorphous when heat treatment temperatures of AAO film were below 800°C, heat treatment temperature of AAO film were 850°C and 1000°C respectively, AAO films were γ-Al2O3and α-Al2O3film respectively.

Effect of Praseodymium Salt on Properties of Anodic Aluminum Oxide Films

2011 ◽  
Vol 399-401 ◽  
pp. 847-850 ◽  
Author(s):  
Xiao Zhen Liu ◽  
Zhao Xin Liu ◽  
Ai Bing Yu ◽  
Gang Wang ◽  
Ling Ling Song ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Aluminum Oxide ◽  
Sulphuric Acid ◽  
Heat Treatment Temperature ◽  
Anodic Aluminum Oxide ◽  
Sulphuric Acid Solution ◽  
Treatment Temperature ◽  
Anodic Aluminum ◽  
Α Al2o3 ◽  
First Time

Praseodymium salt was used as additives for the first time in preparing anodic aluminum oxide (AAO) films to improve its performance. AAO films were prepared by anodization method from a 15 vol.% sulphuric acid solution containing praseodymium salt. The effects of Pr concentration on microhardness and thickness of AAO film were investigated, respectively. The effect of heat treatment temperature on structure of AAO film was investigated. AAO films were characterized by XRD, EDAX and SEM techniques. AAO films showed higher microhardness and thickness, the surface of AAO film was smoother and the aperture of AAO film was more uniform than those of films prepared in 15 vol. % sulphuric acid anodization solution. The microhardness and thickness of AAO film were 355.7HV and 84μm respectively. The apertures of AAO film were in 25～30nm. There was not praseodymium in AAO film. AAO films were amorphous when heat treatment temperatures of AAO film were below 800°C. When heat treatment temperature of AAO film were 850°C and 1000°C respectively, AAO films were γ-Al2O3 and α-Al2O3 film respectively.

Preparation and Effect of Heat Treatment Temperature on the Crystal Phase of Anodic Aluminum Oxide Films

2014 ◽  
Vol 577 ◽  
pp. 11-14
Author(s):  
Xiao Zhen Liu ◽  
Xiao Hui Yan ◽  
Gang Wang ◽  
Xiao Zhou Liu ◽  
Jie Chen ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Aluminum Oxide ◽  
Anodic Aluminum Oxide ◽  
Sulphuric Acid Solution ◽  
Treatment Temperature ◽  
Anodic Aluminum ◽  
Heat Treated ◽  
Mixed Film ◽  
Xrd Techniques ◽  
Anodization Method

The anodic aluminum oxide (AAO) films were prepared by anodization method from the 15 vol. % sulphuric acid solution, and prepared AAO films were heat-treated in the ranges of 25~1000°C. AAO films were characterized by EDAX, SEM and XRD techniques, respectively. The crystal phases of prepared AAO film is amorphous. The apertures of AAO film are in 25~30 nm. AAO films are amorphous when heat treatment temperatures of AAO films are below 800 °C. After the AAO film being heat-treated in the ranges of 850°C~900 °C, the heat-treated AAO film are γ-Al2O3film. When the AAO film is heat-treated at 950 °C, the part of γ-Al2O3change into α-Al2O3, and the heat-treated AAO film are mixed film of γ-Al2O3and α-Al2O3. After the AAO film being heat-treated at 1000 °C, the heat-treated AAO film is α-Al2O3film.

Nanoporous Anodic Aluminum Oxide (AAO) Thin Film Fabrication with Low-Grade Aluminium

2016 ◽  
Vol 872 ◽  
pp. 152-156
Author(s):  
Peerawith Sumtong ◽  
Apiluck Eiad-Ua ◽  
Khattiya Chalapat
Keyword(s):  
Aluminum Oxide ◽  
Anodic Aluminum Oxide ◽  
Pore Diameter ◽  
Average Pore Diameter ◽  
Process Conditions ◽  
Low Grade ◽  
Average Pore ◽  
Aluminium Substrate ◽  
Anodization Time ◽  
Anodic Aluminum

Anodic aluminum oxide (AAO) is well known for its nanoscopic structures and its applications in microfluidics, sensors and nanoelectronics. The pore density, the pore diameter, and the interpore distance of an AAO substrate can be controlled by varying anodization process conditions. In this research, the self-organized two-step anodization is carried out with a low-grade (Al6061) aluminium substrate using a 40V voltage at the temperature of 2 to 5 °C. Three experiments are done with the anodization time of 24 hours, 48 hours and 72 hours. The structural features of AAO are characterized by a field emission electron microscope (FE-SEM). The data from FE-SEM show that the average pore diameter increases with the anodization time, and that the Al6061 aluminium substrate can be used to fabricate a nanoporous AAO film with an average pore diameter smaller than 17 nanometers.

Fabrication of Crystallized Porous Anodic Aluminum Oxide under Ultra-High Anodization Voltage

2018 ◽  
Vol 165 (13) ◽  
pp. E623-E627 ◽  
Author(s):  
Shize Li ◽  
Yi Li ◽  
Shiyu Jin ◽  
Jingcheng Wu ◽  
Zhengxiang Li ◽  
...  
Keyword(s):  
Aluminum Oxide ◽  
Anodic Aluminum Oxide ◽  
Anodization Voltage ◽  
Porous Anodic Aluminum Oxide ◽  
Anodic Aluminum

Optical constants of anodic aluminum oxide films formed in oxalic acid solution

2008 ◽  
Vol 516 (21) ◽  
pp. 7689-7694 ◽  
Author(s):  
Jian Wang ◽  
Cheng-Wei Wang ◽  
Yan Li ◽  
Wei-Min Liu
Keyword(s):  
Oxalic Acid ◽  
Acid Solution ◽  
Aluminum Oxide ◽  
Anodic Aluminum Oxide ◽  
Optical Constants ◽  
Oxide Films ◽  
Oxalic Acid Solution ◽  
Anodic Aluminum

Optimal Processing for Hydrophobic Nanopillar Polymer Surfaces Using Nanoporous Alumina Template

2013 ◽  
Vol 646 ◽  
pp. 84-89
Author(s):  
Chui Yu Chiu ◽  
Yi Lin ◽  
Yu Chi Tseng ◽  
Yung Kang Shen
Keyword(s):  
Thin Film ◽  
Aluminum Oxide ◽  
Anodic Aluminum Oxide ◽  
Hydrophobic Surface ◽  
Processing Parameters ◽  
Contact Angles ◽  
Anodic Aluminum ◽  
Nanoporous Anodic Aluminum Oxide ◽  
Nanoporous Anodic Aluminum ◽  
Anodization Method

Nanoporous anodic aluminum oxide (AAO) templates are fabricated using an anodization method. The mean diameters of nanoporous anodic aluminum oxide templates are 100 nm and 200 nm by various processing parameters of the anodization method. A molded plastic thin film nanostructure is fabricated by nanoimprinting using the AAO template as a mold. The surface properties of the molded plastic thin film are discussed using various nanoimprinting process parameters. Contact angles of the molded plastic thin film with the nanostructure exceed those without the nanostructure. The molded plastic thin films with a nanostructure and a hydrophobic surface are formed, and their contact angles exceed 90°.

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